Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
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| dynamics of multiple elements in fast decomposing vegetable residues. | litter decomposition regulates the cycling of nutrients and toxicants but is poorly studied in farmlands. to understand the unavoidable in-situ decomposition process, we quantified the dynamics of c, h, n, as, ca, cd, cr, cu, fe, hg, k, mg, mn, na, ni, pb, and zn during a 180-d decomposition study in leafy lettuce (lactuca sativa var. longifoliaf) and rape (brassica chinensis) residues in a wastewater-irrigated farmland in northwestern china. different from most studied natural ecosystems, the m ... | 2018 | 29100695 |
| evaluation of leafy vegetables as bioindicators of gaseous mercury pollution in sewage-irrigated areas. | mercury (hg) can evaporate and enter the plants through the stomata of plant leaves, which will cause a serious threat to local food safety and human health. for the risk assessment, this study aimed to investigate the concentration and accumulation of total gaseous mercury (tgm) in five typical leafy vegetables (chinese chives (allium tuberosum rottler), amaranth (amaranthus mangostanus l.), rape (brassica campestris l.), lettuce (lactuca sativa l.), and spinach (spinacia oleracea l.)) grown on ... | 2018 | 29043585 |
| repellent effects of insecticides against protaphorura fimata (collembola: poduromorpha: onychiuridae). | protaphorura fimata gisin (poduromorpha: onychiuridae) is a serious pest of lettuce [lactuca sativa l. (asteraceae)] in the salinas valley of california. because p. fimata is a subterranean springtail species adapted to soil environments, individuals are assumed to be able to sense and behaviorally avoid insecticide-treated soil, and this capacity could be used strategically to control p. fimata. a series of laboratory bioassays was conducted to examine the behavior of p. fimata with respect to ... | 2018 | 29361113 |
| use of tio2 photocatalyst supported on residues of polystyrene packaging and its applicability on the removal of food dyes. | this work proposes the use of plastic residues, more specifically polystyrene packaging, to support tio2, used as a photocatalyst in the degradation of erythrosine and brilliant blue food dyes. the scanning electron microscopy and fourier transform infrared spectroscopy analyses exhibited the surface coating and the presence of tio2 in the material, respectively. the uv/h2o2/tio2((sp)supported) process was used in the preliminary study, given the high percentage of degradation, operational advan ... | 2018 | 29325487 |
| arsenic adsorption and plant availability in an agricultural soil irrigated with as-rich water: effects of fe-rich amendments and organic and inorganic fertilisers. | the use of as-rich water for irrigation in agricultural soils may result in as accumulation in soil and crops, with the consequent risk of its entry into the food chain. the effectiveness of three different fe-based materials (a commercial iron oxide (bayoxide®), lamination slag (a by-product of the hot rolling of steel) and a commercial red mud derivative (virobind™)) used as soil amendments to minimise the impact of irrigation with as-rich water in an agricultural soil-plant system was evaluat ... | 2018 | 29306143 |
| uptake and accumulation of pharmaceuticals in overhead- and surface-irrigated greenhouse lettuce. | understanding the uptake and accumulation of pharmaceuticals in vegetables under typical irrigation practices is critical to risk assessment of crop irrigation with reclaimed water. this study investigated the pharmaceutical residues in greenhouse lettuce under overhead and soil-surface irrigations using pharmaceutical-contaminated water. compared to soil-surface irrigation, overhead irrigation substantially increased the pharmaceutical residues in lettuce shoots. the increased residue levels pe ... | 2018 | 29293328 |
| assessment of genetic diversity in lettuce (lactuca sativa l.) germplasm using rapd markers. | the importance of germplasm characterization is an important link between the conservation and utilization of plant genetic resources in various breeding programmes. in the present study, genetic variability and relationships among 25 lactuca sativa l. genotypes were tested using random amplified polymorphic dna (rapd) molecular markers. a total of 45 random decamer oligonucleotide primers were examined to generate rapd profiles, out of these reproducible patterns were obtained with 22 primers. ... | 2018 | 29259884 |
| testing the toxicity of metals, phenol, effluents, and receiving waters by root elongation in lactuca sativa l. | phytotoxicity tests using higher plants are among the most simple, sensitive, and cost-effective of the methods available for ecotoxicity testing. in the present study, a hydroponic-based phytotoxicity test using seeds of lactuca sativa was used to evaluate the water quality of receiving waters and effluents near two industrial sites (soyo and daejon) in korea with respect to the toxicity of 10 metals (as, cd, cr, cu, fe, pb, mn, hg, ni, zn) and phenol, and of the receiving waters and effluents ... | 2018 | 29182968 |
| root uptake and shoot accumulation of cadmium by lettuce at various cd:zn ratios in nutrient solution. | cadmium (cd) is toxic to animals and humans after it accumulates over decades in the kidney cortex. food crops grown in cd-contaminated soils are the primary sources of excessive cd entry into humans. although plant available zn concentration in soil is an important factor which can greatly reduce cd uptake by plant roots and its translocation into the edible parts, cd:zn ratio is suggested to be a more important factor in comparison with zn concentration alone in determining cd uptake by plants ... | 2018 | 29102904 |
| influence of surface polysaccharides of escherichia coli o157:h7 on plant defense response and survival of the human enteric pathogen on arabidopsis thaliana and lettuce (lactuca sativa). | this study aimed to determine the influence of bacterial surface polysaccharides (cellulose, colanic acid, and lipopolysaccharide; lps) on the colonization or survival of escherichia coli o157:h7 on plants and the plant defense response. survival of e. coli o157:h7 were evaluated on arabidopsis thaliana and romaine lettuce as a model plant and an edible crop (leafy vegetable), respectively. the population of the wild-type strain of e. coli o157:h7 on arabidopsis plants and lettuce was significan ... | 2018 | 29173634 |
| uptake and phytotoxic effect of benzalkonium chlorides in lepidium sativum and lactuca sativa. | cationic surfactants such as benzalkonium chlorides (bacs) are used extensively as biocides in hospitals, food processing industries, and personal care products. bacs have the potential to reach the rooting zone of crop plants and bacs might thereby enter the food chain. the two most commonly used bacs, benzyl dimethyl dodecyl ammonium chloride (bdda) and benzyl dimethyl tetradecyl ammonium chloride (bdta), were tested in a hydroponic system to assess the uptake by and phytotoxicity to lettuce ( ... | 2018 | 29127920 |
| sampling plans for the thrips frankliniella schultzei (thysanoptera: thripidae) in three lettuce varieties. | the common blossom thrips, frankliniella schultzei trybom (thysanoptera: thripidae), is an important lettuce pest worldwide. conventional sampling plans are the first step in implementing decision-making systems into integrated pest management programs. however, this tool is not available for f. schultzei infesting lettuce crops. thus, the objective of this work was to develop a conventional sampling plan for f. schultzei in lettuce crops. two sampling techniques (direct counting and leaf beatin ... | 2017 | 29126240 |
| mode of managing nutrient solution based on n use efficiency for lettuce (lactuca sativa l.). | in aeroponic cultivation the nutrient solution is an essential component to achieve good production results. and nitrogen is the main constituent element of the nutrient solution and essential element in plant nutrition. therefore, the management and monitoring nutrient solution and existing nitrogen is fundamental. the experiment shows that three modes of replacing the nutrient solution and three initial ph values and their interaction significantly influenced the fresh weight and dry matter of ... | 2017 | 29123942 |
| ultrastructural and developmental evidence of phytotoxicity on cos lettuce (lactuca sativa) associated with nonylphenol exposure. | it has long been understood that the presence of endocrine disrupter chemicals (edcs) in water can affect the reproductive, behavioural and regulatory systems of different types of mammals. thus far, only a handful of studies have examined its impact on plant systems. present research is limited to the potential uptake of these chemicals by plants and the general phytotoxic effects it can elicit. the aim of this study was to determine what effect an edc has on developing plant and cell organelle ... | 2017 | 27889509 |
| shelf-life prediction models for ready-to-eat fresh cut salads: testing in real cold chain. | the aim of the study was to develop and test the applicability of predictive models for shelf-life estimation of ready-to-eat (rte) fresh cut salads in realistic distribution temperature conditions in the food supply chain. a systematic kinetic study of quality loss of rte mixed salad (lollo rosso lettuce-40%, lollo verde lettuce-45%, rocket-15%) packed under modified atmospheres (3% o2, 10% co2, 87% n2) was conducted. microbial population (total viable count, pseudomonas spp., lactic acid bacte ... | 2017 | 27745710 |
| transformation of lettuce with rol abc genes: extracts show enhanced antioxidant, analgesic, anti-inflammatory, antidepressant, and anticoagulant activities in rats. | lettuce is an edible crop that is well known for dietary and antioxidant benefits. the present study was conducted to investigate the effects of rol abc genes on antioxidant and medicinal potential of lettuce by agrobacterium-mediated transformation. transgene integration and expression was confirmed through pcr and real-time rt-pcr, respectively. the transformed plants showed 91-102 % increase in total phenolic contents and 53-65 % increase in total flavonoid contents compared to untransformed ... | 2017 | 27734289 |
| synergistic effects of light quality, carbon dioxide and nutrients on metabolite compositions of head lettuce under artificial growth conditions mimicking a plant factory. | carbon dioxide (co2), nutrient supply, and light quality are amongst the major controlling factors to improve the biomass production and nutritional outputs in plant factory. the present study employed ce-ms to investigate the effects of high co2, nutrient formulation, and led on the accumulation of primary metabolites in head lettuce. results suggested that high co2 (1000ppm) and nutrient supply enhanced both the biomass and some amino acids. hierarchical clustering analysis was used to evaluat ... | 2017 | 27719950 |
| efficiency and toxicity: comparison between the fenton and electrochemical processes. | this study aimed to determine the best method to treat a textile effluent containing the dye basic blue 99 (bb). treatments by the electrochemical and the fenton processes were compared by means of a 2(3) experimental design, and the interaction of experimental conditions for bb oxidation were determined. the electrochemical treatment gave better results in the presence of nacl as electrolyte and high current density (30 ma cm(-2)); the fenton reaction provided better results at h2o2 and fe(2+) ... | 2017 | 27642834 |
| heavy metals deposited in the culture of lettuce (lactuca sativa l.) by the influence of vehicular traffic in pernambuco, brazil. | currently one of the main sources of atmospheric pollution identified in urban centers is derived from both industrial and motor vehicle emissions. these pollutants can be adsorbed to particulate matter which is present in the air or deposited in the soil and plants, eventually reaching the human food chain. in this context, the present study aimed to determine the concentration of metals such as cu, pb, cd, ni and zn in two subspecies of lactuca sativa l. and in the soil from were lettuce sampl ... | 2017 | 27542464 |
| zn-biofortification enhanced nitrogen metabolism and photorespiration process in green leafy vegetable lactuca sativa l. | excessive rates of nitrogen (n) fertilizers may result in elevated concentrations of nitrate (no3- ) in plants. considering that many programs of biofortification with trace elements are being performed, it has become important to study how the application of these elements affects plant physiology and, particularly, n utilization in leaf crops. the main objective of the present study was to determine whether the no3- accumulation and the nitrogen use efficiency was affected by the application o ... | 2017 | 27487980 |
| deficit irrigation reduces postharvest rib pinking in wholehead iceberg lettuce, but at the expense of head fresh weight. | postharvest pinking is a serious issue affecting lettuce quality. previous studies suggested the possibility of using deficit irrigation to control discolouration; however, this approach may also affect yield. this study investigated the effect of varying irrigation deficits on iceberg lettuce (lactuca sativa l.) to determine the relationship between irrigation deficit, pinking and fresh weight. | 2017 | 27404345 |
| synthesis of copper-chelates derived from amino acids and evaluation of their efficacy as copper source and growth stimulator for lactuca sativa in nutrient solution culture. | five tetradentate ligands were synthesized from l-amino acids and utilized for the synthesis of cu(ii)-chelates 1-5. the efficacy of cu(ii)-chelates as copper (cu) source and growth stimulator in hydroponic cultivation was evaluated with lactuca sativa. their stability test was performed at ph 4-10. the results suggested that cu(ii)-chelate 3 is the most ph tolerant complex. levels of cu, zn, and fe accumulated in plants supplied with cu(ii)-chelates were compared with those supplied with cuso4 ... | 2017 | 29072914 |
| manipulation of contents of nitrate, phenolic acids, chlorophylls, and carotenoids in lettuce (lactuca sativa l.) via contrasting responses to nitrogen fertilizer when grown in a controlled environment. | this study aimed to use different nitrogen fertilizer regimes to produce butterhead lettuce with such large differences in nitrate content that they could be used as treatment and placebo to study the effect of inorganic nitrate on human health. plants were grown under controlled conditions at 27/23 °c day/night with a relatively low photosynthetically active radiation (par) of 150 μmol m-2 s-1 for 14 h day-1 and nitrogen supplies ranging from 26 to 154 ppm of n as ammonium nitrate in the fertig ... | 2017 | 29059519 |
| nature derived scaffolds for tissue engineering applications: design and fabrication of a composite scaffold incorporating chitosan-g-d,l-lactic acid and cellulose nanocrystals from lactuca sativa l. cv green leaf. | through exhaustive extraction via successive alkali and bleaching treatments cellulose was isolated from lettuce. the isolated cellulose was hydrolyzed using 64wt% h2so4 at 55°c under constant stirring for 1h to obtain cellulose nanocrystals (cncs). characterizations such as sem, tem, ftir, tga and xrd were done in order to determine differences in the physico-chemical characteristics of cellulose after each treatment step. the isolated cncs have mean dimensions of 237±26, 33±12 and 32±7nm in le ... | 2017 | 29054519 |
| experimental-design-guided approach for the removal of atrazine by sono-electrochemical-uv-chlorine techniques. | the aim of the present study was to investigate the electrochemical formation of free chlorine species (hocl/clo-) and their subsequent use for the degradation of the pesticide atrazine. initially, the process of electrochemical-free chlorine production was investigated using a bench-scale electrochemical flow-cell. the most significant variables (electrolyte concentration ([nacl]) and inter-electrode gap) of the process were obtained using a 23 factorial design and the optimum process condition ... | 2017 | 29052462 |
| synthesis of novel glycerol-derived 1,2,3-triazoles and evaluation of their fungicide, phytotoxic and cytotoxic activities. | the synthesis of a series of 1,2,3-triazoles using glycerol as starting material is described. the key step in the preparation of these triazolic derivatives is the copper(i)-catalyzed azide-alkyne cycloaddition (cuaac), also known as click reaction, between 4-(azidomethyl)-2,2-dimethyl-1,3-dioxolane (3) and different terminal alkynes. the eight prepared derivatives were evaluated with regard to their fungicide, phytotoxic and cytotoxic activities. the fungicidal activity was assessed in vitro a ... | 2017 | 28991165 |
| biochar as plant growth promoter: better off alone or mixed with organic amendments? | biochar is nowadays largely used as a soil amendment and is commercialized worldwide. however, in temperate agro-ecosystems the beneficial effect of biochar on crop productivity is limited, with several studies reporting negative crop responses. in this work, we studied the effect of 10 biochar and 9 not pyrogenic organic amendments (npoa), using pure and in all possible combinations on lettuce growth (lactuca sativa). organic materials were characterized by 13c-cpmas nmr spectroscopy and elemen ... | 2017 | 28966625 |
| potential human health risk assessment of cylindrospermopsin accumulation and depuration in lettuce and arugula. | the cyanobacterial toxin cylindrospermopsin (cyn) has become a globally important secondary metabolite due to the negative effect it has on human and animal health. as a means of evaluating the risk of human exposure to cyn, the bioaccumulation and depuration of the toxin in lettuce (lactuca sativa l.) and arugula (eruca sativa mill.) were investigated, after irrigation with contaminated water. the vegetables were irrigated for 7days with cyn (3, 5 and 10μg/l) contaminated water (bioaccumulation ... | 2017 | 28962982 |
| in vivo tracking of copper-64 radiolabeled nanoparticles in lactuca sativa. | engineered nanoparticles (nps) are increasingly used in commercial products including automotive lubricants, clothing, deodorants, sunscreens, and cosmetics and can potentially accumulate in our food supply. given their size it is difficult to detect and visualize the presence of nps in environmental samples, including crop plants. new analytical tools are needed to fill the void for detection and visualization of nps in complex biological and environmental matrices. we aimed to determine whethe ... | 2017 | 28954194 |
| optimization of animal manure vermicomposting based on biomass production of earthworms and higher plants. | the goal of this study was to optimize the mixture of swine manure (sm) and cattle manure (cm) used in the vermicomposting process, seeking to increase the manure biodegradation rate and enhance the biomass production of both earthworms and higher plants. to achieve this goal, physico-chemical parameters were determined to assess the final compost quality after 50 days of vermicomposting. the different manure ratios used to produce the composts (c) were as follows (sm:cm, % m/m basis): c1 100:0, ... | 2017 | 28933648 |
| effects of municipal solid waste- and sewage sludge-compost-based growing media on the yield and heavy metal content of four lettuce cultivars. | compost has been recently suggested as an alternative to peat for the preparation of growing substrates in soilless cultivation systems. however, some physico-chemical properties of compost may reduce plant performance and endanger the quality of productions, in particular for possible heavy metal accumulation in edible parts. this study aims at evaluating the suitability of a municipal solid waste compost (mswc) and a sewage sludge compost (ssc) as components of growing media for the soilless c ... | 2017 | 28933019 |
| study of the mechanism of remediation of cd-contaminated soil by novel biochars. | this article used novel non-magnetized and magnetized biochars prepared under a co2 atmosphere returned to cd-contaminated soil and compared these to the effects of conventional biochars prepared under a n2 atmosphere with regard to cd-contaminated soil remediation. a pot experiment with lettuce (lactuca sativa) was conducted to investigate the relative soil remediation effects of these biochars. the soil used for the pot experiment was spiked with 20 mg kg-1 cd and amended with 5% of a biochar ... | 2017 | 28914413 |
| phytotoxic triterpene saponins from bellis longifolia, an endemic plant of crete. | in a study of 62 plant species of the cretan flora for their phytotoxic activity, plants were extracted successively with ch2cl2, meoh and h2o. phytotoxicity evaluation of the 240 extracts was performed against lactuca sativa l. and agrostis stolonifera l.. the meoh extract of bellis longifolia was the most phytotoxic. bioassay-guided fractionation revealed that a fraction consisting mainly of saponins was the most effective. separation of the saponins was performed using initially a step-gradie ... | 2017 | 28892660 |
| performance of five plant species in removal of nitrogen and phosphorus from an experimental phytoremediation system in the ningxia irrigation area. | agricultural non-point source (anps) pollution is an important contributor to elevated nitrogen (n) and phosphorus (p) in surface waters, which can cause serious environmental problems. considerable effort has therefore gone into the development of methods that control the anps input of n and p to surface waters. phytoremediation has been extensively used because it is cost-effective, environmentally friendly, and efficient. the n and p loads from agricultural drainage are a potential threat to ... | 2017 | 28890992 |
| an ultra-dense integrated linkage map for hexaploid chrysanthemum enables multi-allelic qtl analysis. | we constructed the first integrated genetic linkage map in a polysomic hexaploid. this enabled us to estimate inheritance of parental haplotypes in the offspring and detect multi-allelic qtl. construction and use of linkage maps are challenging in hexaploids with polysomic inheritance. full map integration requires calculations of recombination frequency between markers with complex segregation types. in addition, detection of qtl in hexaploids requires information on all six alleles at one locu ... | 2017 | 28852802 |
| characterization of phenolic compounds in green and red oak-leaf lettuce cultivars by uhplc-dad-esi-qtof/ms using mse scan mode. | lettuce (lactuca sativa) is one of the most popular leafy vegetables in the world and constitutes a major dietary source of phenolic compounds with health-promoting properties. in particular, the demand for green and red oak-leaf lettuces has considerably increased in the last years but few data on their polyphenol composition are available. moreover, the usage of analytical edge technology can provide new structural information and allow the identification of unknown polyphenols. in the present ... | 2017 | 28833875 |
| effect of acaricidal components isolated from lettuce (lactuca sativa) on carmine spider mite (tetranychus cinnabarinus boisd.). | this study aimed to evaluate the acaricidal activity of lettuce (lactuca sativa) extracts against carmine spider mites (tetranychus cinnabarinus boisd.) and isolate the acaricidal components. acaricidal activities of lettuce extracts isolated from different parts (the leaf, root and seed) using various solvents (petroleum ether, acetone and methanol) were evaluated with slide-dip bioassay and relatively high median lethal concentration (lc50) values were detected. acetone extracts of lettuce lea ... | 2017 | 28803552 |
| comparative metagenomics reveals alterations in the soil bacterial community driven by n-fertilizer and amino 16® application in lettuce. | nutrients in the form of fertilizers and/or other additives such as amino acids, dramatically influence plant development and growth, plant nutrient composition and the level of soil pollution. moreover, the treatment of soil microbiota is emerging as a new strategy in plant breeding to achieve desirable traits. thus, integrated study of fertilizer application and soil microbiota might lead to a better understanding of soil-plant interactions and inform the design of novel ways to fertilize plan ... | 2017 | 28794989 |
| combined effects of dissolved humic acids and tourmaline on the accumulation of 2, 2', 4, 4', 5, 5'- hexabrominated diphenyl ether (bde-153) in lactuca sativa. | in order to investigate the effects of dissolved humic acid (dha) and tourmaline on uptake of 2, 2', 4, 4', 5, 5'- hexabrominated diphenyl ether (bde-153) by lactuca sativa, different fractions of dha, including dha1 and dha4, as well as different doses of tourmaline were introduced into bde-153 contaminated solutions for plant growth. the levels of bde-153 in l. sativa tissues were positively correlated with the fe levels (r2 = 0.9264) in seedings of the treatments with different doses of tourm ... | 2017 | 28787706 |
| naphthoquinone derivatives from diospyros maritima. | from the chloroform extract of the fresh fruits of diospyros maritima blume (ebenaceae), five new naphthoquinone derivatives, 2,7'-dimethyl-2',3-bijuglone (27), 2,7'-dimethyl-3,3'-bijuglone (28), 2,7'-dimethyl-6,8'-bijuglone (29), 7,7'-dimethyl-3,3'-ethylidenebijuglone (30), and 2',7-dimethyl-3,6'-ethylidenebijuglone (31), were isolated, in addition to twenty-one known naphthoquinone derivatives: plumbagin (4), droserone (5), 2,3-epoxyplumbagin (8), 3,3'-biplumbagin (9), chitranone (10), 3,8'-bi ... | 2017 | 28768928 |
| linking the morphological and metabolomic response of lactuca sativa l exposed to emerging contaminants using gc × gc-ms and chemometric tools. | the occurrence of contaminants of emerging concern (cecs) in irrigation waters (up to low μg l-1) and irrigated crops (ng g-1 in dry weight) has been reported, but the linkage between plant morphological changes and plant metabolomic response has not yet been addressed. in this study, a non-targeted metabolomic analysis was performed on lettuce (lactuca sativa l) exposed to 11 cecs (pharmaceuticals, personal care products, anticorrosive agents and surfactants) by irrigation. the plants were wate ... | 2017 | 28747703 |
| a rapid and efficient in vitro regeneration system for lettuce (lactuca sativa l.). | successful biotechnological improvement of crop plants requires a reliable and efficient in vitro regeneration system. lettuce (lactuca sativa l.), one the most important vegetable crops worldwide, is strongly genotype-dependent in terms of regeneration capacity, limiting the potential for biotechnological improvement of cultivars which show recalcitrance under currently available protocols. the effect of different nutrient sources, plant hormone combinations and activated charcoal supplementati ... | 2017 | 28736573 |
| rnai-mediated resistance to whitefly (bemisia tabaci) in genetically engineered lettuce (lactuca sativa). | rna interference (rnai)-based transgenic technologies have evolved as potent biochemical tools for silencing specific genes of plant pathogens and pests. the approach has been demonstrated to be useful in silencing genes in insect species. here, we report on the successful construction of rnai-based plasmid containing an interfering cassette designed to generate dsrnas that target a novel v-atpase transcript in whitefly (bemisia tabaci), an important agricultural pest in tropical and sub-tropica ... | 2017 | 28712067 |
| expression analysis of polyphenol oxidase isozymes by active staining method and tissue browning of head lettuce (lactuca sativa l.). | browning of plant tissue is generally considered attributable to enzymatic oxidation by polyphenol oxidase (ppo). electrophoresis followed by activity staining has been used as an effective procedure to visually detect and isolate isozymes; however, it has not been applied for examination of various ppo isozymes in lettuce. our study demonstrated that different lettuce ppo isozymes could be detected at different ph in active staining, and multiple isozymes were detected only under alkaline condi ... | 2017 | 28681699 |
| allelopathy and resource competition: the effects of phragmites australis invasion in plant communities. | phragmites australis, a ubiquitous wetland plant, has been considered one of the most invasive species in the world. allelopathy appears to be one of the invasion mechanisms, however, the effects could be masked by resource competition among target plants. the difficulty of distinguishing allelopathy from resource competition among plants has hindered investigations of the role of phytotoxic allelochemicals in plant communities. this has been addressed via experiments conducted in both the green ... | 2017 | 28664396 |
| effect of different elicitors and preharvest day application on the content of phytochemicals and antioxidant activity of butterhead lettuce (lactuca sativa var. capitata) produced under hydroponic conditions. | the effect of four elicitors on phytochemical content in two varieties of lettuce was evaluated. the best preharvest day for application of each elicitor was chosen. solutions of arachidonic acid (aa), salicylic acid (sa), methyl jasmonate (mj), and harpin protein (hp) were applied by foliar aspersion on lettuce leaves while cultivating under hydroponic conditions. application of elicitors was done at 15, 7, 5, 3, or 1 day before harvest. green lettuce showed the highest increase in phytochemica ... | 2017 | 28613869 |
| impact of solar radiation exposure on phyllosphere bacterial community of red-pigmented baby leaf lettuce. | solar radiation has been identified as a stress factor affecting phyllosphere associated bacteria colonization and survival during primary production. in the present study, the impact of different solar radiation doses on the phyllosphere microbiota of red-pigmented baby leaf lettuce cultivated in open field under commercial conditions was evaluated. four weeks before harvest, the growing field was divided into four plots; each one was consecutively covered with one-week-interval with a light-ex ... | 2017 | 28576376 |
| assessing phytotoxicity of trace element-contaminated soils phytomanaged with gentle remediation options at ten european field trials. | gentle remediation options (gro), i.e. in situ stabilisation, (aided) phytoextraction and (aided) phytostabilisation, were implemented at ten european sites contaminated with trace elements (te) from various anthropogenic sources: mining, atmospheric fallout, landfill leachates, wood preservatives, dredged-sediments, and dumped wastes. to assess the performance of the gro options, topsoil was collected from each field trial, potted, and cultivated with lettuce (lactuca sativa l.) for 48days. sho ... | 2017 | 28531917 |
| occurrence of chemical contaminants in peri-urban agricultural irrigation waters and assessment of their phytotoxicity and crop productivity. | water scarcity and water pollution have increased the pressure on water resources worldwide. this pressure is particularly important in highly populated areas where water demand exceeds the available natural resources. in this regard, water reuse has emerged as an excellent water source alternative for peri-urban agriculture. nevertheless, it must cope with the occurrence of chemical contaminants, ranging from trace elements (tes) to organic microcontaminants. in this study, chemical contaminant ... | 2017 | 28511359 |
| the rhizoctonia solani ag1-ib (isolate 7/3/14) transcriptome during interaction with the host plant lettuce (lactuca sativa l.). | the necrotrophic pathogen rhizoctonia solani is one of the most economically important soil-borne pathogens of crop plants. isolates of r. solani ag1-ib are the major pathogens responsible for bottom-rot of lettuce (lactuca sativa l.) and are also responsible for diseases in other plant species. currently, there is lack of information regarding the molecular responses in r. solani during the pathogenic interaction between the necrotrophic soil-borne pathogen and its host plant. the genome of r. ... | 2017 | 28486484 |
| genome assembly with in vitro proximity ligation data and whole-genome triplication in lettuce. | lettuce (lactuca sativa) is a major crop and a member of the large, highly successful compositae family of flowering plants. here we present a reference assembly for the species and family. this was generated using whole-genome shotgun illumina reads plus in vitro proximity ligation data to create large superscaffolds; it was validated genetically and superscaffolds were oriented in genetic bins ordered along nine chromosomal pseudomolecules. we identify several genomic features that may have co ... | 2017 | 28401891 |
| reliability of plant root comet assay in comparison with human leukocyte comet assay for assessment environmental genotoxic agents. | comet assay is an efficient test to detect genotoxic compounds based on observation of dna damage. the aim of this work was to compare the results obtained from the comet assay in two different type of cells extracted from the root tips from lactuca sativa l. and human blood. for this, spent pot liner (spl), and its components (aluminum and fluoride) were applied as toxic agents. spl is a solid waste generated in industry from the aluminum mining and processing with known toxicity. three concent ... | 2017 | 28395203 |
| promotion of germination using hydroxamic acid inhibitors of 9-cis-epoxycarotenoid dioxygenase. | abscisic acid (aba) inhibits seed germination and the regulation of aba biosynthesis has a role in maintenance of seed dormancy. the key rate-limiting step in aba biosynthesis is catalyzed by 9-cis-epoxycarotenoid dioxygenase (nced). two hydroxamic acid inhibitors of carotenoid cleavage dioxygenase (ccd), d4 and d7, previously found to inhibit ccd and nced in vitro, are shown to have the novel property of decreasing mean germination time of tomato (solanum lycopersicum l.) seeds constitutively o ... | 2017 | 28373878 |
| differential degradation and detoxification of an aromatic pollutant by two different peroxidases. | enzymatic degradation of organic pollutants is a new and promising remediation approach. peroxidases are one of the most commonly used classes of enzymes to degrade organic pollutants. however, it is generally assumed that all peroxidases behave similarly and produce similar degradation products. in this study, we conducted detailed studies of the degradation of a model aromatic pollutant, sulforhodamine b dye (srb dye), using two peroxidases-soybean peroxidase (sbp) and chloroperoxidase (cpo). ... | 2017 | 28335468 |
| phytotoxic activity and chemical composition of cassia absus seeds and aerial parts. | the present study was conducted to assess the phytotoxic potential and the phytochemical composition of cassia absus. aqueous extracts caused significant reduction in root growth of lactuca sativa. seed extract was more effective than aerial part extract. successive extractions of this plant were performed using solvents with increasing polarities. the methanolic seed extract exerted strong phytotoxic effect on seedling growth, followed by petroleum ether extract of the aerial part. the phytoche ... | 2017 | 28292195 |
| physiological mechanisms only tell half story: multiple biological processes are involved in regulating freezing tolerance of imbibed lactuca sativa seeds. | the physiological mechanisms by which imbibed seeds survive freezing temperatures in their natural environment have been categorized as freezing avoidance by supercooling and freezing tolerance by extracellular freeze-desiccation, but the biochemical and molecular mechanisms conferring seed freezing tolerance is unexplored. in this study, using imbibed lactuca sativa seeds we show that fast cooled seeds (60 °c h-1) suffered significantly higher membrane damage at temperature between -20 °c and - ... | 2017 | 28287125 |
| treated wastewater phytotoxicity assessment using lactuca sativa: focus on germination and root elongation test parameters. | sensitive and simple ecotoxicological bioassays like seed germination and root elongation tests are commonly used to evaluate the phytotoxicity of waste and industrial discharge waters. although the tests are performed following national and international standards, various parameters such as the number of seeds per dish, the test duration or the type of support used remain variable. to be able to make a correct comparison of results from different studies, it is crucial to know which parameter( ... | 2017 | 28256413 |
| standardized extract of lactuca sativa linn. and its fractions abrogates scopolamine-induced amnesia in mice: a possible cholinergic and antioxidant mechanism. | the present study was designed to evaluate the efficacy of lactuca sativa (ls) linn. (asteraceae) against scopolamine- induced amnesia and to validate its traditional claim as memory enhancer. | 2017 | 28245707 |
| molecular biogeography of prickly lettuce (lactuca serriola l.) shows traces of recent range expansion. | prickly lettuce (lactuca serriola l., asteraceae), a wild relative of cultivated lettuce, is an autogamous species which greatly expanded throughout western and northern europe during the last 2 centuries. here, we present a large-scale biogeographic genetic analysis performed on a dataset represented by 2622 individuals from 110 wild european populations. thirty-two maternally inherited chloroplast rflp-markers and 10 nuclear microsatellite loci were used. microsatellites revealed low genetic v ... | 2017 | 28172969 |
| lactucaxanthin - a potential anti-diabetic carotenoid from lettuce (lactuca sativa) inhibits α-amylase and α-glucosidase activity in vitro and in diabetic rats. | intestinal and pancreatic α-amylase and α-glucosidase inhibitors offer an approach to lower the levels of post-prandial hyperglycemia through the control of dietary starch breakdown in digestion. this study hypothesized that lactucaxanthin (lxn) in lettuce (lactuca sativa) inhibits the activity of α-amylase and α-glucosidase. in this study, the interaction of lxn with α-amylase and α-glucosidase in silico and its inhibitory effect on these enzymes were studied using in vitro and stz-induced diab ... | 2017 | 28170007 |
| chloroplast genome resources and molecular markers differentiate rubber dandelion species from weedy relatives. | rubber dandelion (taraxacum kok-saghyz, tk) is being developed as a domestic source of natural rubber to meet increasing global demand. however, the domestication of tk is complicated by its colocation with two weedy dandelion species, taraxacum brevicorniculatum (tb) and the common dandelion (taraxacum officinale, to). tb is often present as a seed contaminant within tk accessions, while to is a pandemic weed, which may have the potential to hybridize with tk. to discriminate these species at t ... | 2017 | 28152978 |
| towards new sources of resistance to the currant-lettuce aphid (nasonovia ribisnigri). | domesticated lettuce varieties encompass much morphological variation across a range of crop type groups, with large collections of cultivars and landrace accessions maintained in genebanks. additional variation not captured during domestication, present in ancestral wild relatives, represents a potentially rich source of alleles that can deliver to sustainable crop production. however, these large collections are difficult and costly to screen for many agronomically important traits. in this pa ... | 2017 | 28111522 |
| antifungal activity of umbelliferone derivatives: synthesis and structure-activity relationships. | umbelliferone was an important allelochemical with a wide spectrum bioactivity. in our previous study, c7 hydroxy in the backbone of umbelliferone was identified to be responsible for its phytotoxicity and the targeted modification of the above site could lead to the phytotoxicity loss. in view of this, a series of hydroxycoumarins and c7 o-substituted umbelliferone derivatives were efficiently synthesized to evaluate their antifungal activity against four phytopathogenic fungi. most of them, as ... | 2017 | 28089948 |
| effect of proline on biochemical and molecular mechanisms in lettuce (lactuca sativa l.) exposed to uv-b radiation. | the purpose of the present study was to evaluate the role of proline (pro) in relieving uv-b radiation-induced oxidative stress in lettuce. lettuce seedlings were exposed to 3.3 w m-2 uv-b radiation for 12 h after pre-treatment sprayed with 20 mm pro. the data for malondialdehyde (mda), hydrogen peroxide (h2o2), endogenous pro level, the activities of antioxidant enzymes [superoxide dismutase (sod), catalase (cat), ascorbate peroxidase (apx), and peroxidase (pod)], total phenolic concentration, ... | 2017 | 28070585 |
| pb low doses induced genotoxicity in lactuca sativa plants. | soil and water contamination by lead (pb) remains a topic of great concern, particularly regarding crop production. the admissible pb values in irrigation water in several countries range from ≈0.1 to ≈5 mg l-1. in order to evaluate putative effects of pb within legal doses on crops growth, we exposed lactuca sativa seeds and seedlings to increasing doses of pb(no3)2 up to 20 mg l-1. the oecd parameter seed germination and seedling/plant growth were not affected by any of the pb-concentrations u ... | 2017 | 28064118 |
| far-red light is needed for efficient photochemistry and photosynthesis. | the efficiency of monochromatic light to drive photosynthesis drops rapidly at wavelengths longer than 685nm. the photosynthetic efficiency of these longer wavelengths can be improved by adding shorter wavelength light, a phenomenon known as the emerson enhancement effect. the reverse effect, the enhancement of photosynthesis under shorter wavelength light by longer wavelengths, however, has not been well studied and is often thought to be insignificant. we quantified the effect of adding far-re ... | 2017 | 28039776 |
| a dose-response relationship for marketable yield reduction of two lettuce (lactuca sativa l.) cultivars exposed to tropospheric ozone in southern europe. | the present study investigated the response to ozone (o3) of two cultivars (cv.'romana' and cv. 'canasta') of irrigated lettuce grown in an open-top chamber (otc) experiment in mediterranean conditions. two different levels of o3 were applied, ambient o3 in non-filtered otcs (nf-otcs) and -40% of ambient o3 in charcoal-filtered otcs (cf-otcs), during four consecutive growing cycles. at the end of each growing cycle, the marketable yield (fresh biomass) was assessed while during the growing perio ... | 2017 | 28028698 |
| effect of soil biochar concentration on the mitigation of emerging organic contaminant uptake in lettuce. | although crop uptake of emerging organic contaminants (eoc) from irrigation water and soils has been previously reported, successful mitigation strategies have not yet been established. in this study, soil was amended with a wood-based biochar (bc) at two rates (0, 2.5 and 5% w/w) to evaluate the effect on mitigation of eoc uptake (i.e. bisphenol a, caffeine, carbamazepine, clofibric acid, furosemide, ibuprofen, methyl dihydrojasmonate, tris(2-chloroethyl)phosphate, triclosan, and tonalide) in l ... | 2017 | 27143287 |
| standardization of unani antidiabetic tablet - qurse tabasheer. | quality control of unani polyherbal formulations is the need of the day for better acceptance of unani medicine. qurse tabasheer (qt) is a unani polyherbal formulation containing six ingredients, tabasheer (siliceous concretions) (bambosa arundinaceae retz.), gule surkh (rosa damascena mill. flower), gulnar (punica granatum linn. flower), tukhme kahu (lactuca sativa linn. seed), tukhme khurfa (portulaca oleraceae linn. seed), and gile armani (bole) widely used in treatment of diabetes. the prese ... | 2017 | 27034607 |
| relationships between nuclear magnetic resonance parameters used to characterize weathering spilled oil and soil toxicity in central patagonia. | oil spill in the central patagonian zone was studied to evaluate if any relationship exists between the parameters used to characterize weathering spilled oil and soil toxicity for two plant species and to evaluate if the phytotoxicity to local species would be a good index for the soil contamination. nuclear magnetic resonance (nmr) structural indexes and column chromatography compositional indexes were determined to characterize the oil spill in the soil samples. bioassays were also carried ou ... | 2017 | 25145179 |
| analysis of eleven phenolic compounds including novel p-coumaroyl derivatives in lettuce (lactuca sativa l.) by ultra-high-performance liquid chromatography with photodiode array and mass spectrometry detection. | lettuce is a widely consumed vegetable and a good source of phenolic compounds. several factors (genetic, agronomical and environmental) can influence the lettuce composition; their effects are not completely defined and more studies are needed on this topic. | 2017 | 21433163 |
| phytoavailability of cadmium in long-term biosolids-amended soils. | agronomic use of biosolids has raised concern that plant availability of biosolids-cd will increase with time after cessation of biosolids application. it has been demonstrated that chemical extractability of cd is persistently decreased in biosolids-amended soils. this study was conducted to determine if cd phytoavailability in long-term biosolids-amended soils was also persistently decreased. paired control and biosolids-amended soils were collected from three experimental sites where large cu ... | 2017 | 20176825 |
| antifeedant and phytotoxic activity of cacalolides and eremophilanolides. | the antifeedant effect of six cacalolides and six eremophilanolides was tested against the herbivorous insects spodoptera littoralis, leptinotarsa decemlineata, and myzus persicae. the test compounds included several natural products isolated from senecio madagascariensis (14-isovaleryloxy-1,2-dehydrocacalol methyl ether, 4), s. barba-johannis (13-hydroxy-14-oxocacalohastine, 5; 13-acetyloxy-14-oxocacalohastine, 6) and s. toluccanus [6-hydroxyeuryopsin, 7; 1(10)-epoxy-6-hydroxyeuryopsin, 9; tolu ... | 2017 | 17708441 |
| cadmium, copper, nickel, and zinc availability in a biosolids-amended piedmont soil years after application. | concerns over the possible increase in phytoavailability of biosolids-applied trace metals to plants have been raised based on the assumption that decomposition of applied organic matter would increase phytoavailability. the objectives of this study were to assess the effect of time on chemical extractability and concentration of cd, cu, ni, and zn in plants on plots established by a single application of biosolids with high trace metals content in 1984. biosolids were applied to 1.5 by 2.3 m co ... | 2017 | 16275727 |
| inoculation density is affecting growth conditions of listeria monocytogenes on fresh cut lettuce. | listeria monocytogenes is a particular risk for the ready-to-eat food sector because of its ability to grow in various environmental conditions. in the literature, growth and survival of l. monocytogenes on food is tested using inoculation densities ranging from less than 102 to over 105 cfu g-1. inoculation densities on food have been rarely tested as a factor for growth. in this study, inoculation densities from 102 to 105 of l. monocytogenes were tested on iceberg lettuce (lactuca sativa) in ... | 2017 | 29181800 |
| evaluation of zinc oxide nanoparticles on lettuce (lactuca sativa l.) growth and soil bacterial community. | the wide spread of nanoparticles (nps) has caused tremendous concerns on agricultural ecosystem. some metallic nps, such as zinc oxide (zno), can be utilized as a nano-fertilizer when used at optimal doses. however, little is known about the responses of plant development and concomitant soil bacteria community to zno nps. the present pot experiment studied the impacts of different doses of zno nps and bulk zno (0, 1, 10, 100 mg zno/kg), on the growth of lettuce (lactuca sativa l.) and the assoc ... | 2017 | 29238929 |
| effects of glucose and ethylene on root hair initiation and elongation in lettuce (lactuca sativa l.) seedlings. | root hair formation occurs in lettuce seedlings after transfer to an acidic medium (ph 4.0). this process requires cortical microtubule (cmt) randomization in root epidermal cells and the plant hormone ethylene. we investigated the interaction between ethylene and glucose, a new signaling molecule in plants, in lettuce root development, with an emphasis on root hair formation. dark-grown seedlings were used to exclude the effect of photosynthetically produced glucose. in the dark, neither root h ... | 2017 | 29236179 |
| assembly of the lactuca sativa, l. cv. tizian draft genome sequence reveals differences within major resistance complex 1 as compared to the cv. salinas reference genome. | lettuce (lactuca sativa, l.) is an important annual plant of the family asteraceae (compositae). the commercial lettuce cultivar tizian has been used in various scientific studies investigating the interaction of the plant with phytopathogens or biological control agents. here, we present the de novo draft genome sequencing and gene prediction for this specific cultivar derived from transcriptome sequence data. the assembled scaffolds amount to a size of 2.22 gb. based on rnaseq data, 31,112 tra ... | 2017 | 29278726 |
| production and characterization of a biosurfactant produced by streptomyces sp. dpua 1559 isolated from lichens of the amazon region. | surfactants are amphipathic compounds containing both hydrophilic and hydrophobic groups, capable to lower the surface or interfacial tension. considering the advantages of the use of biosurfactants produced by microorganisms, the aim of this paper was to develop and characterize a biosurfactant produced by streptomyces sp. dpua1559 isolated from lichens of the amazon region. the microorganism was cultured in a mineral medium containing 1% residual frying soybean oil as the carbon source. the ki ... | 2017 | 29267499 |
| exogenous glycine nitrogen enhances accumulation of glycosylated flavonoids and antioxidant activity in lettuce (lactuca sativa l.). | glycine, the simplest amino acid in nature and one of the most abundant free amino acids in soil, is regarded as a model nutrient in organic nitrogen studies. to date, many studies have focused on the uptake, metabolism and distribution of organic nitrogen in plants, but few have investigated the nutritional performance of plants supplied with organic nitrogen. lettuce (lactuca sativa l.), one of the most widely consumed leafy vegetables worldwide, is a significant source of antioxidants and bio ... | 2017 | 29326732 |
| an in vivo whole-plant experimental system for the analysis of gene expression in extraradical mycorrhizal mycelium. | arbuscular mycorrhizal fungi (amf) establish beneficial mutualistic symbioses with land plants, receiving carbon in exchange for mineral nutrients absorbed by the extraradical mycelium (erm). with the aim of obtaining in vivo produced erm for gene expression analyses, a whole-plant bi-dimensional experimental system was devised and tested with three host plants and three fungal symbionts. in such a system, funneliformis mosseae in symbiosis with cichorium intybus var. foliosum, lactuca sativa, a ... | 2017 | 28573458 |
| simultaneous determination of fluoroquinolones and sulfonamides originating from sewage sludge compost. | a simultaneous method for quantitative determination of traces of fluoroquinolones (fqs) and sulfonamides (sas) in edible plants fertilized with sewage sludge was developed. the compounds were extracted from the plants by rapid and simple liquid extraction followed by extracts clean-up using solid phase extraction. the eluent additive 1,1,1,3,3,3-hexafluoro-2-propanol was used for liquid chromatographic detection to achieve separation of structurally similar antimicrobials like ciprofloxacin and ... | 2017 | 28695191 |
| removal of pesticides and ecotoxicological changes during the simultaneous treatment of triazines and chlorpyrifos in biomixtures. | biopurification systems constitute a biological approach for the treatment of pesticide-containing wastewaters produced in agricultural activities, and contain an active core called biomixture. this work evaluated the performance of a biomixture to remove and detoxify a combination of three triazine herbicides (atrazine/terbuthylazine/terbutryn) and one insecticide (chlorpyrifos), and this efficiency was compared with dissipation in soil alone. the potential enhancement of the process was also a ... | 2017 | 28494353 |
| performance of an integrated system combining microalgae and vertical flow constructed wetlands for urban wastewater treatment. | the present study investigated the performance of an integrated system, combining the sequential use of microalgae (ma) and vertical flow constructed wetland (vfcw) for the treatment of wastewaters produced at a university campus. ecotoxicity and phytotoxicity assays were performed using respectively daphnia magna and lactuca sativa, whereas the genotoxicity of the wastewaters was assessed by using d. magna and allium cepa. the results revealed that the major environmental impacts of the studied ... | 2017 | 28710729 |
| evaluation of toxic and genotoxic potential of a wet gas scrubber effluent obtained from wooden-based biomass furnaces: a case study in the red ceramic industry in southern brazil. | red ceramic industry in southern brazil commonly uses wood biomass as furnace fuel generating great amounts of gas emissions and ash. to avoid their impact on atmospheric environment, wet scrubbing is currently being applied in several plants. however, the water leachate formed could be potentially toxic and not managed as a common water-based effluent, since the resulting wastewater could carry many toxic compounds derived from wood pyrolysis. there is a lack of studies regarding this kind of e ... | 2017 | 28551583 |
| efficacy of combination treatment with sodium metasilicate and sodium hypochlorite for inactivation of norovirus on fresh vegetables. | in recent years, fresh vegetables have frequently been associated with the foodborne transmission of enteric viruses, such as human norovirus (nov). therefore, several studies have focused on developing methods to inactivate foodborne viruses for preventing outbreaks of foodborne illnesses. sodium hypochlorite (naocl) is commonly used as a disinfectant, but results in undesirable effects on the appearance and taste of foods and can generate toxic byproducts when it exceeds the allowable concentr ... | 2017 | 29068710 |
| is root catalase a bifunctional catalase-peroxidase? | plant catalases exhibit spatial and temporal distribution of their activity. moreover, except from the typical monofunctional catalase, a bifunctional catalase-peroxidase has been reported. the aim of this study was to investigate whether the leaf and root catalases from six different plant species (lactuca sativa, cichorium endivia, apium graveolens, petroselinum crispum, lycopersicon esculentum, and solanum melongena) correspond to the monofunctional or the bifunctional type based on their sen ... | 2017 | 28587060 |
| elemental composition of vegetables cultivated over coal-mining waste. | we assessed elemental composition of the liver in mice subjected to one-time or chronic consumption of the juice of vegetables cultivated in a vegetable garden built over deposits of coal waste. lactuca sativa l. (lettuce), beta vulgaris l. (beet), brassica oleracea l. var. italica (broccoli) and brassica oleracea l. var. acephala (kale) were collected from the coal-mining area and from a certified organic farm (control). elemental composition was analyzed by particle-induced x-ray emission (pix ... | 2017 | 29069139 |
| influence of interval between postharvest lettuce residue management and subsequent seeding of broccoli on cabbage maggot (diptera: anthomyiidae) infestation on broccoli. | larval stages of cabbage maggot, delia radicum (l.) (diptera: anthomyiidae), attack the roots of brassica crops and cause severe economic damage. in the salinas valley of california, brassica crops are often planted after successive lettuce (lactuca sativa l.) crops. the interval between postharvest soil incorporation of lettuce residue and the subsequent brassica crop can be as short as 7 d, which could influence d. radicum infestation on broccoli (brassica oleracea var. italica plenck). in 201 ... | 2017 | 28981649 |
| lettuce-produced hepatitis c virus e1e2 heterodimer triggers immune responses in mice and antibody production after oral vaccination. | the hepatitis c virus (hcv) is a major etiologic agent for severe liver diseases (e.g. cirrhosis, fibrosis and hepatocellular carcinoma). approximately 140 million people have chronic hcv infections and about 500 000 die yearly from hcv-related liver pathologies. to date, there is no licensed vaccine available to prevent hcv infection and production of a hcv vaccine remains a major challenge. here, we report the successful production of the hcv e1e2 heterodimer, an important vaccine candidate, i ... | 2017 | 28419665 |
| human norovirus and its surrogates induce plant immune response in arabidopsis thaliana and lactuca sativa. | human norovirus is the leading cause of foodborne illness worldwide with the majority of outbreaks linked to fresh produce and leafy greens. it is essential that we thoroughly understand the type of relationship and interactions that take place between plants and human norovirus to better utilize control strategies to reduce transmission of norovirus in the field onto plants harvested for human consumption. in this study the expression of gene markers for the salicylic acid (sa) and jasmonic aci ... | 2017 | 28504573 |
| rapid transient production of a monoclonal antibody neutralizing the porcine epidemic diarrhea virus (pedv) in nicotiana benthamiana and lactuca sativa. | porcine epidemic diarrhea virus (pedv) causes acute diarrhea, vomiting, dehydration, weight loss, and high mortality rate in neonatal piglets. porcine epidemic diarrhea (ped) has been reported in europe, america, and asia including thailand. the disease causes substantial losses to the swine industry in many countries. presently, there is no effective pedv vaccine available. in this study, we developed a plant-produced monoclonal antibody (mab) 2c10 as a prophylactic candidate to prevent the ped ... | 2017 | 28575911 |
| effect of diet on carboxylesterase activity of tadpoles (rhinella arenarum) exposed to chlorpyrifos. | an outdoor microcosm was performed with tadpoles (rhinella arenarum) exposed to 125μgl-1 chlorpyrifos and fed two types of food, i.e., lettuce (lactuca sativa) and a formulated commercial pellet. acetylcholinesterase (ache) and carboxylesterase (cbe) activities were measured in liver and intestine after 10 days of pesticide exposure. non-exposed tadpoles fed lettuce had an intestinal ache activity almost two-fold higher than that of pellet-fed tadpoles. no significant differences were observed, ... | 2017 | 27664371 |
| evaluation of remediation techniques in soils affected by residual contamination with heavy metals and arsenic. | residual soil pollution from the aznalcóllar mine spill is still a problem in some parts of the affected area, today converted in the guadiamar green corridor. dispersed spots of polluted soils, identified by the absence of vegetation, are characterized by soil acid ph and high concentrations of as, pb, cu and zn. ex situ remediation techniques were performed with unrecovered soil samples. landfarming, composting and biopiles techniques were tested in order to immobilize pollutants, to improve s ... | 2017 | 28110163 |
| isolation of a phytotoxic isocoumarin from diaporthe eres-infected hedera helix (english ivy) and synthesis of its phytotoxic analogs. | the fungus diaporthe eres was isolated from a fungal pathogen-infected leaf of hedera helix (english ivy) exhibiting necrosis. it is hypothesized that the causative fungus produces phytotoxins as evidenced by necrotic lesions on the leaves. | 2017 | 28834621 |
| [combination of phosphorus solubilizing and mobilizing fungi with phosphate rocks and volcanic materials to promote plant growth of lettuce (lactuca sativa l.)]. | arbuscular mycorrhizal fungi (amf) increase the uptake of soluble phosphates, while phosphorus solubilizing fungi (s) promote solubilization of insoluble phosphates complexes, favoring plant nutrition. another alternative to maintaining crop productivity is to combine minerals and rocks that provide nutrients and other desirable properties. the aim of this work was to combine amf and s with pyroclastic materials (ashes and pumices) from puyehue volcano and phosphate rocks (pr) from rio chico gro ... | 2017 | 28893530 |
| toxicological features of maleilated polyflavonoids from pinus radiata (d. don.) as potential functional additives for biomaterials design. | polyflavonoids from pinus radiata (d. don.) are an abundant natural oligomers highly desirable as renewable chemicals. however, structural modification of polyflavonoids is a viable strategy in order to use such polyphenols as macrobuilding-blocks for biomaterial design. polyflavonoids were esterified with three five-member cyclic anhydrides (maleic, itaconic, and citraconic) at 20 °c during 24 h in order to diversify physicochemical-, and biological-properties for agricultural, and food-packagi ... | 2017 | 28302477 |
| simultaneous removal of structurally different pesticides in a biomixture: detoxification and effect of oxytetracycline. | the biopurification systems (bps) used for the treatment of pesticide-containing wastewater must present a versatile degrading ability, in order to remove different active ingredients according to the crop protection programs. this work aimed to assay the simultaneous removal of several pesticides (combinations of herbicides/insecticides/fungicides, or insecticides/fungicides) in a biomixture used in a bps over a period of 115 d, and in the presence of oxytetracycline (otc), an antibiotic of agr ... | 2017 | 27898329 |
| degradation and ecotoxicity of dye reactive black 5 after reductive-oxidative process : environmental science and pollution research. | this research paper describes the study of a reduction-oxidation system using commercial steel wool (fe(0)) and h2o2 for degradation of the dye reactive black 5 and aromatic compounds in water. the reductive process alone allowed the almost complete removal of color (97 ± 1 %) after 60 min of reaction. the decrease in spectral area (λ = 599 nm) associated with the chromophore group indicates breakage of the azo bonds. moreover, the significant change in uv spectra can be associated with the form ... | 2017 | 27384167 |
| ecotoxicity evaluation of a wwtp effluent treated by solar photo-fenton at neutral ph in a raceway pond reactor. | some pollutants can be resistant to wastewater treatment, hence becoming a risk to aquatic and terrestrial biota even at the very low concentrations (ng l(-1)-μg l(-1)) they are commonly found at. tertiary treatments are used for micropollutant removal but little is known about the ecotoxicity of the treated effluent. in this study, a municipal secondary effluent was treated by a solar photo-fenton reactor at initial neutral ph in a raceway pond reactor, and ecotoxicity was evaluated before and ... | 2017 | 27335017 |