| a phytotoxic active substance in the decomposing litter of the fern gleichenia japonica. | the fern gleichenia japonica often dominates plant communities by forming large monospecific stands throughout the temperate to tropical asia. the objective of this study was the investigation of allelopathic property and substances of the decomposing litter of the fern to evaluate the possible involvement of its allelopathy in the domination. an aqueous methanol extract of g. japonica litter inhibited the growth of garden cress (lepidium sativum), lettuce (lactuca sativa), barnyard grass (echin ... | 2015 | 25569852 |
| suaveolic acid: a potent phytotoxic substance of hyptis suaveolens. | hyptis suaveolens (lamiaceae) is an exotic invasive plant in many countries. earlier studies reported that the aqueous, methanol, and aqueous methanol extract of h. suaveolens and its residues have phytotoxic properties. however, to date, the phytotoxic substances of this plant have not been reported. therefore, the objectives of this study were isolation and identification of phytotoxic substances of h. suaveolens. aqueous methanol extract of this plant was purified by several chromatographic r ... | 2014 | 25405221 |
| phytotoxic activity of ocimum tenuiflorum extracts on germination and seedling growth of different plant species. | phytotoxic activity of ocimum tenuiflorum (lamiaceae) plant extracts was investigated against the germination and seedling growth of cress (lepidium sativum), lettuce (lactuca sativa), alfalfa (medicago sativa), italian ryegrass (lolium multiflorum), barnyard grass (echinochloa crus-galli), and timothy (phleum pratense) at four different concentrations. the plant extracts at concentrations greater than 30 mg dry weight equivalent extract ml(-1) reduced significantly the total germination percent ... | 2014 | 25032234 |
| allelopathy is involved in the formation of pure colonies of the fern gleichenia japonica. | the fern gleichenia japonica is one of the most widely distributed fern and occurs throughout east to south asia. the species often dominates plant communities by forming large monospecific colonies. however, the potential mechanism for this domination has not yet been described. the objective of this study was to test the hypothesis that allelochemicals are involved in the formation of g. japonica colonies. an aqueous methanol extract of g. japonica inhibited the growth of seedlings of garden c ... | 2013 | 23286996 |
| mechanism of selective phytotoxicity of l-3,4-dihydroxyphenylalanine (l-dopa) in barnyardgrass and lettuce. | l-3,4-dihydroxyphenylalanine (l-dopa) is one of the few allelochemicals in which the phytotoxic action mechanism has been studied. excess exogenous l-dopa suppresses root elongation in some plant species, and the inhibitory action is species-selective. the main factor of phytotoxicity of l-dopa is considered to be oxidative damage by reactive oxygen species (ros) and/or free radical species (frs). this study was performed to elucidate the mechanism of species-selective phytotoxicity. the involve ... | 2007 | 17899281 |
| bioavailability of barium to plants and invertebrates in soils contaminated by barite. | barium (ba) is a nonessential element to terrestrial organisms and is known to be toxic at elevated concentrations. in this study, the bioavailability and toxicity of ba in barite (baso4) contaminated soils was studied using standard test organisms (lactuca sativa l. "great lakes", eisenia fetida). contamination resulted from barite mining activities. barium concentrations in contaminated soils determined by x-ray fluorescence were in the range 0.13-29.2%. barite contaminated soils were shown to ... | 2013 | 23484806 |
| earthworm bioassays and seedling emergence for monitoring toxicity, aging and bioaccumulation of anthropogenic waste indicator compounds in biosolids-amended soil. | land application of biosolids (treated sewage sludge) can be an important route for introducing xenobiotic compounds into terrestrial environments. there is a paucity of available information on the effects of biosolids amendment on terrestrial organisms. in this study, the influence of biosolids and biosolids aging on earthworm (eisenia fetida) reproduction and survival and lettuce (lactuca sativa) seedling emergence was investigated. earthworms were exposed to soils amended with varying quanti ... | 2012 | 22832088 |
| evaluation of the effectiveness of various amendments on trace metals stabilization by chemical and biological methods. | we evaluated the effects of five different kinds of amendments on heavy metals stabilization. the five amendments were: zero valent iron, limestone, acid mine drainage treatment sludge, bone mill, and bottom ash. to determine bioavailability of the heavy metals, different chemical extraction procedures were used such as, extraction with (ca(no(3))(2), dtpa; toxic characteristic leaching procedure (tclp), physiologically based extraction test (pbet) that simulates gastric juice, and sequential ex ... | 2011 | 21333442 |
| volatile emission in dry seeds as a way to probe chemical reactions during initial asymptomatic deterioration. | the nature and kinetics of reactions in dry seeds determines how long the seeds survive. we used gas chromatography to assay volatile organic compounds (vocs) emitted from seeds of three unrelated species as a means to non-invasively probe chemical changes during very dry, dry, and humid storage (seeds were dried to 5.5, 33, and 75% relative humidity at room temperature). vocs emitted from seeds stored in humid conditions reflected fermentation-type reactions, with methanol and ethanol being pre ... | 2016 | 26956506 |
| phytochemical relationship of euphorbia helioscopia and euphorbia pulcherrima with lactuca sativa. | allelopathy is an important phenomenon that modifies the ecosystem. a plant can enhance or reduce the growth of other plant due to the presence of a number of allelochemicals in its different parts. euphorbia helioscopia and euphorbia pulcherrima are medicinal plant species. both these species are collected from wild resources for various purposes. to reduce the pressure on wild population, it is important to bring them into cultivation. therefore, the allelopathic effects of e. helioscopia and ... | 2014 | 25075544 |
| ecotoxicity of arsenic contaminated sludge after mixing with soils and addition into composting and vermicomposting processes. | sludge coming from remediation of groundwater contaminated by industry is usually managed as hazardous waste despite it might be considered for further processing as a source of nutrients. the ecotoxicity of phosphorus rich sludge contaminated with arsenic was evaluated after mixing with soil and cultivation with sinapis alba, and supplementation into composting and vermicomposting processes. the enchytraeus crypticus and folsomia candida reproduction tests and the lactuca sativa root growth tes ... | 2016 | 27348256 |
| copper toxicity in a natural reference soil: ecotoxicological data for the derivation of preliminary soil screening values. | the risk assessment of contaminated soils is conventionally done with the support of soil screening values (ssvs). since ssvs are still unavailable for many european countries, including portugal, standardized toxicity tests are urgently claimed for their derivation. hence, this work aimed the generation of toxicity values for copper (cu) in a natural reference soil (ptrs1) targeting different terrestrial species, endpoints and soil functions, as to derive a preliminary cu ssv. for this, the ass ... | 2016 | 26520436 |
| contribution for the derivation of a soil screening value (ssv) for uranium, using a natural reference soil. | in order to regulate the management of contaminated land, many countries have been deriving soil screening values (ssv). however, the ecotoxicological data available for uranium is still insufficient and incapable to generate ssvs for european soils. in this sense, and so as to make up for this shortcoming, a battery of ecotoxicological assays focusing on soil functions and organisms, and a wide range of endpoints was carried out, using a natural soil artificially spiked with uranium. in terrest ... | 2014 | 25353962 |
| toxicity of methyl tert butyl ether to soil invertebrates (springtails: folsomia candida, proisotoma minuta, and onychiurus folsomi) and lettuce (lactuca sativa). | experiments were conducted to assess the toxicity of methyl tert butyl ether (mtbe) to three species of collembola (proisotoma minuta, folsomia candida, and onychiurus folsomi) and lettuce (lactuca sativa l.) using an artificial organization for economic cooperation and development (oecd) soil and field-collected sandy loam and silt loam soil samples. soil invertebrate tests were carried out in airtight vials to prevent volatilization of mtbe out of the test units and to allow for direct head-sp ... | 2010 | 20821452 |
| complete genome sequence of the biofilm-forming microbacterium sp. strain bh-3-3-3, isolated from conventional field-grown lettuce (lactuca sativa) in norway. | the genus microbacterium contains bacteria that are ubiquitously distributed in various environments and includes plant-associated bacteria that are able to colonize tissue of agricultural crop plants. here, we report the 3,508,491 bp complete genome sequence of microbacterium sp. strain bh-3-3-3, isolated from conventionally grown lettuce (lactuca sativa) from a field in vestfold, norway. the nucleotide sequence of this genome was deposited into ncbi genbank under the accession cp017674. | 2017 | 27900265 |
| complete genome sequence of the biofilm-forming curtobacterium sp. strain bh-2-1-1, isolated from lettuce (lactuca sativa) originating from a conventional field in norway. | here, we present the 3,795,952 bp complete genome sequence of the biofilm-forming curtobacterium sp. strain bh-2-1-1, isolated from conventionally grown lettuce (lactuca sativa) from a field in vestfold, norway. the nucleotide sequence of this genome was deposited into ncbi genbank under the accession cp017580. | 2016 | 27872813 |
| biocidal compounds from mentha sp. essential oils and their structure-activity relationships. | essential oils from greek mentha species showed different chemical compositions for two populations of m. pulegium, characterized by piperitone and pulegone. mentha spicata essential oil was characterized by endocyclic piperitenone epoxide, piperitone epoxide, and carvone. the bioactivities of these essential oils and their components have been tested against insect pests (leptinotarsa decemlineata, spodoptera littoralis and myzus persicae), root-knot nematodes (meloydogine javanica) and plants ... | 2017 | 27770481 |
| acinetobacter lactucae sp. nov., isolated from iceberg lettuce (asteraceae: lactuca sativa). | strain nrrl b-41902t and three closely related strains were isolated from iceberg lettuce. the strain was found to consist of strictly aerobic, gram-stain-negative rods that formed cocci in late stationary phase. 16s rrna gene sequence analysis showed that strain nrrl b-41902t was most closely related to species within the genera acinetobacter, and that a grouping of it and the three other closely related strains was most closely related to the type strain of acinetobacter pittii, which was also ... | 2016 | 27339105 |
| potential application of a bioemulsifier-producing actinobacterium for treatment of vinasse. | vinasse is a complex effluent created during production of ethyl alcohol, which can present serious pollution hazard in areas where it is discharged. a variety of technologies, many based upon recovery of the effluent via microbial pathways, are continually being evaluated in order to mitigate the pollution potential of vinasse. the present work reports on initial advances related to the effectiveness of the actinobacterium streptomyces sp. mc1 for vinasse treatment. alternative use of raw vinas ... | 2016 | 26421623 |
| sensitivity of salad greens (lactuca sativa l. and eruca sativa mill.) exposed to crude extracts of toxic and non-toxic cyanobacteria. | we evaluated the effect of crude extracts of the microcystin-producing (mc+) cyanobacteria microcystis aeruginosa on seed germination and initial development of lettuce and arugula, at concentrations between 0.5 μg.l(-1) and 100 μg.l(-1) of mc-lr equivalent, and compared it to crude extracts of the same species without the toxin (mc-). crude extracts of the cyanobacteria with mc (+) and without mc (-) caused different effects on seed germination and initial development of the salad green seedlin ... | 2015 | 26132007 |
| laccase-catalyzed decolorization of malachite green: performance optimization and degradation mechanism. | malachite green (mg) was decolorized by laccase (laca) of white-rot fungus cerrena sp. with strong decolorizing ability. decolorization conditions were optimized with response surface methodology. a highly significant quadratic model was developed to investigate mg decolorization with laca, and the maximum mg decolorization ratio of 91.6% was predicted under the conditions of 2.8 u ml(-1) laca, 109.9 mg l(-1) mg and decolorization for 172.4 min. kinetic studies revealed the km and kcat values of ... | 2015 | 26020270 |
| investigation on the effects of guava (psidium guajava l.) infusions on germination, root tips and meristematic cells of latuca sativa. | guava (psidium guajava l.) is a plant often employed in popular medicine. recently several studies have alerted about the toxicity of substances present in medicinal plants, which can pose risks to the human health. in this sense, the present work aimed to investigate the phytotoxic, cytotoxic and genotoxic action of three guava varieties - paluma, pedro sato and roxa ("purple") - on the plant test system lactuca sativa l. thus, macro- and microscopic evaluations were carried out for five infusi ... | 2015 | 25993362 |
| versatility of streptomyces sp. m7 to bioremediate soils co-contaminated with cr(vi) and lindane. | the aim of this work was to study the impact of environmental factors on the bioremediation of cr(vi) and lindane contaminated soil, by an actinobacterium, streptomyces sp. m7, in order to optimize the process. soil samples were contaminated with 25 µg kg(-1) of lindane and 50 mg kg(-1) of cr(vi) and inoculated with streptomyces sp. m7. the lowest inoculum concentration which simultaneously produced highest removal of cr(vi) and lindane was 1 g kg(-1). the influence of physical and chemical para ... | 2015 | 25749405 |
| characterization of cytochalasins from the endophytic xylaria sp. and their biological functions. | bioassay-guided fractionation of the fermentation extract of xylaria sp. xc-16, an endophyte from toona sinensis led to the isolation of two new cytochalasans cytochalasin z27, 1, and cytochalasin z28, 2, along with three known compounds seco-cytochalasin e, 3, and cytochalasin z18, 4, and cytochalasin e, 5. the structures of 1 and 2 were elucidated by spectroscopic and electronic circular dichroism methods. compound 5 was shown to be potently cytotoxic against brine shrimp (lc50 = 2.79 μm), com ... | 2014 | 25350301 |
| construction of transplastomic lettuce (lactuca sativa) dominantly producing astaxanthin fatty acid esters and detailed chemical analysis of generated carotenoids. | the plastid genome of lettuce (lactuca sativa l.) cv. berkeley was site-specifically modified with the addition of three transgenes, which encoded β,β-carotenoid 3,3'-hydroxylase (crtz) and β,β-carotenoid 4,4'-ketolase (4,4'-oxygenase; crtw) from a marine bacterium brevundimonas sp. strain sd212, and isopentenyl diphosphate isomerase from a marine bacterium paracoccus sp. strain n81106. constructed transplastomic lettuce plants were able to grow on soil at a growth rate similar to that of non-tr ... | 2014 | 24287848 |
| microwave-enhanced uv/h2o2 degradation of an azo dye (tartrazine): optimization, colour removal, mineralization and ecotoxicity. | this study optimizes two factors, ph and initial [h2o2], in the ultraviolet (uv)/h2o2/microwave (mw) process through experimental design and assesses the effect of mws on the colour removal of an azo-dye (tartrazine) solution that was favoured by an acidic ph. the estimated optimal conditions were: initial [h2o2] = 2.0 mmol l(-1) and ph = 2.6, at 30 +/- 2 degrees c. we obtained colour removals of approximately 92% in 24 min of irradiation (edl, 244.2 w), following zero order kinetics: k = (3.9 + ... | 2013 | 24191458 |
| toxicological evaluation of vegetable oils and biodiesel in soil during the biodegradation process. | vegetable oils and their derivatives, like biodiesel, are used extensively throughout the world, thus posing an environmental risk when disposed. toxicity testing using test organisms shows how these residues affect ecosystems. toxicity tests using earthworms (eisenia foetida) are widespread because they are a practical resource for analyzing terrestrial organisms. for phytotoxicological analysis, we used seeds of arugula (eruca sativa) and lettuce (lactuca sativa) to analyze the germination of ... | 2012 | 24031989 |
| bioaccumulation of microcystins in lettuce. | the contamination of lettuce (lactuca sativa l.) by water-borne crude extracts of the cyanobacterium microcystin-producing microcystis aeruginosa (kützing) kützing was investigated. the aim of the study was to determine whether bioaccumulation of microcystins occurs in lettuce foliar tissue when sprayed with solutions containing microcystins at concentrations observed in aquatic systems (0.62 to 12.5 μg · l(-1) ). microcystins were found in lettuce foliar tissues (8.31 to 177.8 μg per kg of fres ... | 2012 | 27010003 |
| phytotoxic action mechanism of hapalocyclamide in lettuce seedlings. | hapalocyclamide (cyclo-thiazole-l-alanine-oxazole-d-alanine-d-thiazoline-d-phenylalanine), a hexapeptide phytotoxic compound, was isolated from the terrestrial cyanobacterium hapalosiphon sp. the phytotoxic action of the compound was investigated in lettuce (lactuca sativa l. cv. great lakes no. 366) by determining its effects on several physiological processes. hapalocyclamide effectively inhibited mitosis process in root tips, which resulted in the suppression of primary root growth of lettuce ... | 2012 | 22771432 |
| proximate nutrient analyses of four species of submerged aquatic vegetation consumed by florida manatee (trichechus manatus latirostris) compared to romaine lettuce (lactuca sativa var. longifolia). | free-ranging florida manatees (trichechus manatus latirostris) consume a variety of sea grasses and algae. this study compared the dry matter (dm) content, proximate nutrients (crude protein [cp], ether-extracted crude fat [ee], nonfiber carbohydrate [nfc], and ash), and the calculated digestible energy (de) of sea grasses (thalassia testudinum, halodule wrightii, and syringodium filiforme) collected in spring, summer, and winter, and an alga (chara sp.) with those of romaine lettuce (lactuca sa ... | 2010 | 21370638 |
| a gene encoding an abscisic acid biosynthetic enzyme (lsnced4) collocates with the high temperature germination locus htg6.1 in lettuce (lactuca sp.). | thermoinhibition, or failure of seeds to germinate when imbibed at warm temperatures, can be a significant problem in lettuce (lactuca sativa l.) production. the reliability of stand establishment would be improved by increasing the ability of lettuce seeds to germinate at high temperatures. genes encoding germination- or dormancy-related proteins were mapped in a recombinant inbred line population derived from a cross between l. sativa cv. salinas and l. serriola accession uc96us23. this reveal ... | 2011 | 20703871 |
| immobilized inocula of white-rot fungi accelerate both detoxification and organic matter transformation in two-phase dry olive-mill residue. | the potential use for agronomic purposes of dry olive-mill residue (dor), solid waste from the olive oil two-phase extraction process, might be impaired by its phytotoxicity. although fungal treatments can detoxify dor, long times are required for these processes. the objective of this study was to assess whether the addition of immobilized fungal inocula to dor might improve colonization rates, thus reducing the time necessary for its detoxification and bioconversion. inocula of panus tigrinus ... | 2009 | 19469503 |
| a survey of syrphid predators of nasonovia ribisnigri in organic lettuce on the central coast of california. | organic lettuce, lactuca sativa l., producers on california's central coast rely on endemic syrphid flies (diptera: syrphidae) to suppress populations of nasonovia ribisnigri mosley (homoptera: aphididae) and other aphids affecting lettuce. growers are using various forms of habitat manipulation to enhance biological control. we surveyed syrphids collected from organic romaine in and around the salinas valley from march through september 2005 to gain a better understanding of the species respons ... | 2007 | 17370807 |
| [lettuce, lactuca sp., as a medicinal plant in polish publications of the 19th century]. | mentions of lettuce lactuca sp. that have appeared since antiquity contained similar information on its curative properties, but such properties were ascribed to different species or varieties. apart from the wild and poisonous lettuce, also garden or common lettuce were identified as having curative action, and some publications lacked information enabling the precise identification of the lettuce in question. in the 19th century, attempts were made to put some order into the knowledge of lettu ... | 2005 | 17153150 |
| phytotoxic components produced by pathogenic fusarium against morning glory. | a pathogenic isolate of fusarium, f. oxysporum f. sp. batatas o-17 (pf), causes wilt disease in leaf etiolation in sweet potato (ipomoea batatas) and morning glory (ipomoea tricolor). extracts from pf cultures were screened for phytotoxic components using a growth inhibition assay with morning glory seedlings. the extracts were fractionated using differential solvent extraction and two active compounds, ergosterol and fusalanipyrone, were isolated from the less-polar fraction. growth inhibition ... | 2013 | 16402546 |
| integrating biological treatment of crop residue into a hydroponic sweetpotato culture. | residual biomass from hydroponic culture of sweetpotato [ipomoea batatas (l.) lam.] was degraded using natural bacterial soil isolates. sweetpotato was grown for 120 days in hydroponic culture with a nutrient solution comprised of a ratio of 80% modified half hoagland solution to 20% filtered effluent from an aerobic starch hydrolysis bioreactor. the phytotoxicity of the effluent was assayed with waldmann's green' lettuce (lactuca sativa l.) and the ratio selected after a 60-day bioassay using s ... | 1997 | 11542554 |
| growth of plants in solution culture containing low levels of chromium. | chromium was not required for normal growth of romaine lettuce (lactuca sativa l. subsp. longifolia), tomato (lycopersicon esculentum mill.), wheat (triticum aestivum l.), or bean (phaseolus vulgaris l.) in solution culture containing 3.8 x 10(-4) mum cr. plants grown on this purified nutrient solution contained an average of 22 ng cr/g dry weight. duckweed (lemna sp.) grew and reproduced normally on a dilute nutrient solution containing 3.8 x 10(-5) mum cr. | 1973 | 16658503 |
| a novel substance with allelopathic activity in ginkgo biloba. | ginkgo (ginkgo biloba) is one of the oldest living tree species and has been widely used in traditional medicine. leaf extracts of ginkgo, such as the standardized extract egb761, have become one of the best-selling herbal products. however, no bioactive compound directed at plants has been reported in this species. therefore, we investigated possible allelopathic activity and searched for allelopathically active substances in ginkgo leaves. an aqueous methanol leaf extract inhibited the growth ... | 2013 | 23932539 |
| reducing plant uptake of pahs by cationic surfactant-enhanced soil retention. | reducing the transfer of contaminants from soils to plants is a promising approach to produce safe agricultural products grown on contaminated soils. in this study, 0-400 mg/kg cetyltrimethylammonium bromide (ctmab) and dodecylpyridinium bromide (ddpb) were separately utilized to enhance the sorption of pahs onto soils, thereby reducing the transfer of pahs from soil to soil solution and subsequently to plants. concentrations of phenanthrene and pyrene in vegetables grown in contaminated soils t ... | 2009 | 19232798 |
| rubisco catalytic properties and temperature response in crops. | rubisco catalytic traits and their thermal dependence are two major factors limiting the co2 assimilation potential of plants. in this study, we present the profile of rubisco kinetics for 20 crop species at three different temperatures. the results largely confirmed the existence of significant variation in the rubisco kinetics among species. although some of the species tended to present rubisco with higher thermal sensitivity (e.g. oryza sativa) than others (e.g. lactuca sativa), interspecifi ... | 2016 | 27329223 |
| effects of bisphenol a on chlorophyll fluorescence in five plants. | the aim of this study was to evaluate the effects of bisphenol a (bpa) on plant photosynthesis and determine whether the photosynthetic response to bpa exposure varies in different plants. chlorophyll fluorescence techniques were used to investigate the effects of bpa on chlorophyll fluorescence parameters in tomato (lycopersicum esculentum), lettuce (lactuca sativa), soybean (glycine max), maize (zea mays), and rice (oryza sativa) seedlings. low-dose (1.5 or 3.0 mg l(-1)) bpa exposure improved ... | 2015 | 26154046 |
| pip aquaporin gene expression in arbuscular mycorrhizal glycine max and lactuca sativa plants in relation to drought stress tolerance. | although the discovery of aquaporins in plants has resulted in a paradigm shift in the understanding of plant water relations, the relationship between aquaporins and plant responses to drought still remains elusive. moreover, the contribution of aquaporin genes to the enhanced tolerance to drought in arbuscular mycorrhisal (am) plants has never been investigated. therefore, we studied, at a molecular level, whether the expression of aquaporin-encoding genes in roots is altered by the am symbios ... | 2006 | 16514562 |
| proximate composition of celss crops grown in nasa's biomass production chamber. | edible biomass from four crops of wheat (triticum aestivum l.), four crops of lettuce (lactuca sativa l.), four crops of potato (solanum tuberosum l.), and three crops of soybean (glycine max (l.) merr.) grown in nasa's celss biomass production chamber were analyzed for proximate composition. all plants were grown using recirculating nutrient (hydroponic) film culture with ph and electrical conductivity automatically controlled. temperature and humidity were controlled to near optimal levels for ... | 1996 | 11538813 |
| a role for ethylene in the metabolism of cyanide by higher plants. | the action of ethylene on the capacity of plant tissues to metabolize cyanide to beta-cyanoalanine was examined. beta-cyanoalanine synthase (ec 4.4.1.9) catalyzes the reaction between cyanide and cysteine to form beta-cyanoalanine and hydrogen sulfide. levels of beta-cyanoalanine synthase activity in tissues of 6 day old etiolated pea (pisum sativum) seedlings were enhanced severalfold by 1 microliter per liter ethylene. the promotive effect of ethylene increased with increasing ethylene concent ... | 1989 | 16666701 |
| volatiles emitted by bacillus sp. bct9 act as growth modulating agents on lactuca sativa seedlings. | chemical products are applied during horticulture to increase food production, but the environmental problems resulting from these applications have led to a search for more sustainable products. volatile organic compounds (vocs) demonstrating plant growth promoter (pgp) activity released by bacterial species have emerged as alternatives, but their effects on lactuca sativa growth are unknown. in this study, vocs released by bacillus sp. bct9 cultures grown in different media (methyl red & voges ... | 2017 | 28754207 |
| uptake of organic emergent contaminants in spath and lettuce: an in vitro experiment. | although a myriad of organic microcontaminants may occur in irrigation waters, little attention has been paid to their incorporation in crops. in this work, a systematic approach to assess the final fate of both ionizable and neutral organic contaminants taken up by plants is described. in vitro uptake of triclosan (tcs), hydrocinnamic acid (hca), tonalide (ton), ibuprofen (ibf), naproxen (npx), and clofibric acid (cfa) were studied in lettuce ( lactuca sativa l) and spath ( spathiphyllum spp.) ... | 2012 | 22293031 |
| differences in internalization and growth of escherichia coli o157:h7 within the apoplast of edible plants, spinach and lettuce, compared with the model species nicotiana benthamiana. | internalization of food-borne bacteria into edible parts of fresh produce plants represents a serious health risk. therefore, internalization of verocytotoxigenic e. coli o157:h7 isolate sakai was assessed in two species associated with outbreaks, spinach (spinacia oleracea) and lettuce (lactuca sativa) and compared to the model species nicotiana benthamiana. internalization occurred in the leaves and roots of spinach and lettuce throughout a 10 day time-course. the plant species, tissue type an ... | 2017 | 28169510 |
| absence of internalization of escherichia coli o157:h7 into germinating tissue of field-grown leafy greens. | both growth chamber and field studies were conducted to investigate the potential for escherichia coli o157:h7 to be internalized into leafy green tissue when seeds were germinated in contaminated soil. internalized e. coli o157:h7 was detected by enrichment in both spinach (spinacia oleracea l.) and lettuce (lactuca sativa l.) seedlings when seeds were germinated within the growth chamber in autoclaved and nonautoclaved soil, respectively, contaminated with e. coli o157:h7 at 2.0 and 3.8 log cf ... | 2014 | 24490912 |
| 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 |
| assessing the combination of iron sulfate and organic materials as amendment for an arsenic and copper contaminated soil. a chemical and ecotoxicological approach. | the efficiency of combining iron sulfate and organic amendments (paper mill sludge, olive mill waste compost and olive tree pruning biochar) for the remediation of an as- and cu-contaminated soil was evaluated. changes in as and cu fractionation and solubility due to the application of the amendments was explored by leachate analysis, single and sequential extractions. also, the effects on arrhenatherum elatius growth, germination of lactuca sativa and toxicity to the bacteria vibrio fischeri we ... | 2016 | 27681110 |
| effect of soil properties on the toxicity of pb: assessment of the appropriateness of guideline values. | soil contamination with lead is a worldwide problem. pb can cause adverse effects, but its mobility and availability in the terrestrial environment are strongly controlled by soil properties. the present study investigated the influence of different soil properties on the solubility of lead in laboratory spiked soils, and its toxicity in three bioassays, including lactuca sativa root elongation and vibrio fischeri illumination tests applied to aqueous extracts and basal soil respiration assays. ... | 2015 | 25704434 |
| particle size characterization of oak wood leachate: chemical oxygen demand and toxicity distribution within different fractions. | oak wood leachate obtained from two storage facilities (storage pound and ditch) in a wood-based industry, and leachate generated by a laboratory leaching test, were characterized in seven categories regarding particle size distribution (psd) (raw leachate, ≤ 20 μm, ≤ 10 μm, ≤ 1.2 μm, ≤ 13 nm, ≤ 5 nm and ≤ 2 nm). the psd followed a normal distribution model with a correlation coefficient (r) varying from 82 to 88. each fraction was analysed regarding chemical oxygen demand, polyphenols and acute ... | 2014 | 25098881 |
| anaerobic baffled reactor coupled with chemical precipitation for treatment and toxicity reduction of industrial wastewater. | this study describes the reduction of soluble chemical oxygen demand (cods) and the removal of dissolved organic carbon (doc), formaldehyde (fa) and nitrogen from highly polluted wastewater generated during cleaning procedures in wood floor manufacturing using a laboratory-scale biological anaerobic baffled reactor followed by chemical precipitation using mgci2 .6h20 + na2hpo4. by increasing the hydraulic retention time from 2.5 to 3.7 and 5 days, the reduction rates of fa, doc and cods of nearl ... | 2014 | 24600852 |
| 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 |
| assessing the effect of sodium dichloroisocyanurate concentration on transfer of salmonella enterica serotype typhimurium in wash water for production of minimally processed iceberg lettuce (lactuca sativa l.). | this study evaluated the impact of sodium dichloroisocyanurate (5, 10, 20, 30, 40, 50 and 250 mg l(-1) ) in wash water on transfer of salmonella typhimurium from contaminated lettuce to wash water and then to other noncontaminated lettuces washed sequentially in the same water. experiments were designed mimicking the conditions commonly seen in minimally processed vegetable (mpv) processing plants in brazil. the scenarios were as follows: (1) washing one inoculated lettuce portion in nonchlorina ... | 2016 | 27105015 |
| antioxidant potential of lactuca sativa. | the present study is based on the evaluation of antioxidant potential of a well known plant lactuca sativa. methanolic leaf extract was investigated for in vitro inhibition of oxidative damage induced by uv-radiations to the salmonella typhi bacteria and in vivo effect on the production of body enzymes i.e. catalase and superoxide dismutase. the lipid peroxidation masurement was also done in terms of thiobarbituric acid reactive substances (tbars) in blood and brain of male albino wistar rats. t ... | 2004 | 22557144 |
| biochar potential in intensive cultivation of capsicum anuum l. (sweet pepper): crop yield and plant protection. | the influence of various biochars on crop yield and disease resistance of capsicum anuum l. (sweet pepper) under modern, high-input, intensive net house cultivation was tested over the course of 2011 to 2014 in the arava desert region of israel. a pot experiment with lactuca sativa l. (lettuce) grown in the absence of fertilizer employed the 3-year old field trial soils to determine if biochar treatments contributed to soil intrinsic fertility. | 0 | 28612389 |
| evaluation of borage extracts as potential biostimulant using a phenomic, agronomic, physiological, and biochemical approach. | biostimulants are substances able to improve water and nutrient use efficiency and counteract stress factors by enhancing primary and secondary metabolism. premise of the work was to exploit raw extracts from leaves (le) or flowers (fe) of borago officinalis l., to enhance yield and quality of lactuca sativa 'longifolia,' and to set up a protocol to assess their effects. to this aim, an integrated study on agronomic, physiological and biochemical aspects, including also a phenomic approach, has ... | 0 | 28638392 |
| lettuce flavonoids screening and phenotyping by chlorophyll fluorescence excitation ratio. | environmentally induced variation and the genotypic differences in flavonoid and phenolic content in lettuce can be reliably detected using the appropriate parameters derived from the records of rapid non-invasive fluorescence technique. the chlorophyll fluorescence excitation ratio method was designed as a rapid and non-invasive tool to estimate the content of uv-absorbing phenolic compounds in plants. using this technique, we have assessed the dynamics of accumulation of flavonoids related to ... | 0 | 28303392 |
| arsenic uptake by lettuce from as-contaminated soil remediated with pteris vittata and organic amendment. | leaching of inorganic arsenic (as) from chromated copper arsenate (cca)-treated wood may elevate soil as levels. thus, an environmental concern arises regarding as accumulation in vegetables grown in these soils. in this study, a greenhouse experiment was conducted to investigate the ability of as-hyperaccumulator p. vittata and organic amendments in reducing as uptake by lettuce (lactuca sativa) from a soil contaminated from cca-treated wood (63.9 mg kg(-1) as). p. vittata was grown for 150 d i ... | 0 | 28273532 |
| simultaneous detection of sulfoxaflor and its metabolites, x11719474 and x11721061, in lettuce using a modified quechers extraction method and liquid chromatography-tandem mass spectrometry. | an analytical method has been developed to quantify the residual levels of sulfoxaflor and its metabolites (x11719474 and x11721061) in/on cultivated lettuce grown under greenhouse conditions. samples were extracted and purified using a quick, easy, cheap, effective, rugged, and safe 'quechers' method (original version) following systematic method optimization and were analyzed by liquid chromatography-tandem mass spectrometry (lc-ms/ms). good linearity with coefficient of determination ≥0.9930 ... | 0 | 27995654 |
| growth promotion of lactuca sativa in response to volatile organic compounds emitted from diverse bacterial species. | agrochemicals are currently used in horticulture to increase crop production. nevertheless, their indiscriminate use is a relevant issue for environmental and legal aspects. alternative tools for reducing fertilizers and synthetic phytohormones are being investigated, such as the use of volatile organic compounds (vocs) as growth inducers. some soil bacteria, such as pseudomonas and bacillus, stimulate arabidopsis and tobacco growth by releasing vocs, but their effects on vegetables have not bee ... | 0 | 27825485 |
| chemical composition and allelopathic potential of essential oils from citharexylum spinosum l. grown in tunisia. | citharexylum spinosum l. (verbenaceae) also known as citharexylum quadrangulare jacq. or citharexylum fruticosum l. is an exotic tree introduced many years ago in tunisia, specially used as a street and park ornamental tree. essential oils (eos) were obtained by hydrodistillation of the different parts (roots, stems, leaves, flowers and fruits; drupes) collected from trees grown in the area of monastir (tunisia). in total, 84 compounds, representing 90.1 - 98.4% of the whole oil composition, wer ... | 0 | 27685082 |
| chemical composition and allelopathic potential of essential oils from tipuana tipu (benth.) kuntze cultivated in tunisia. | in tunisia, tipuana tipu (benth.) kuntze is an exotic tree, which was introduced many years ago and planted as ornamental street, garden, and park tree. the present work reported, for the first time, the chemical composition and evaluates the allelopathic effect of the hydrodistilled essential oils of the different parts of this tree, viz., roots, stems, leaves, flowers, and pods gathered in the area of sousse, a coastal region, in the east of tunisia. in total, 86 compounds representing 89.9 - ... | 0 | 26916976 |
| c15083. chemical composition and allelopathic potential of essential oils from tipuana tipu (benth.) kuntze cultivated in tunisia. | in tunisia, tipuana tipu (benth.) kuntze is an exotic tree, which was introduced many years ago and planted as ornamental street, garden, and park tree. the present work reported, for the first time, the chemical composition and evaluates the allelopathic effect of the hydrodistilled essential oils of the different parts of this tree, viz., roots, stems, leaves, flowers and pods gathered in the area of sousse, a coastal region, in the east of tunisia. in total, 86 compounds representing 89.9-94. ... | 0 | 26864905 |
| phytotoxicity of three plant-based biodiesels, unmodified castor oil, and diesel fuel to alfalfa (medicago sativa l.), lettuce (lactuca sativa l.), radish (raphanus sativus), and wheatgrass (triticum aestivum). | the wide use of plant-based oils and their derivatives, in particular biodiesel, have increased extensively over the past decade to help alleviate demand for petroleum products and improve the greenhouse gas emissions profile of the transportation sector. biodiesel is regarded as a clean burning alternative fuel produced from livestock feeds and various vegetable oils. although in theory these animal and/or plant derived fuels should have less environmental impact in soil based on their simplifi ... | 0 | 26283287 |
| effect of a non-woven fabric covering on the residual activity of pendimethalin in lettuce and soil. | lettuce (lactuca sativa l.) is a crop that is very sensitive to herbicide contamination owing to its short growing season. the use of long-residual herbicides and non-woven fabric coverings could therefore influence pendimethalin concentrations in soil and lettuce. | 0 | 27558779 |
| non-destructive prediction of pigment content in lettuce based on visible-nir spectroscopy. | lettuce (lactuca sativa l.) is one of the most important salad vegetables in the world, with a number of head shapes, leaf types and colors. the lettuce pigments play important physiological functions, such as photosynthetic processes and light stress defense, but they also benefit human health because of their antioxidant action and anticarcinogenic properties. in this study three lettuce cultivars were grown under different farming systems, and partial least squares models were built to predic ... | 0 | 27553517 |
| uptake of antibiotics from irrigation water by plants. | the capacity of carrot (daucus corota l.) and lettuce (lactuca sativa l.), two plants that are usually eaten raw, to uptake tetracycline and amoxicillin (two commonly used antibiotics) from irrigated water was investigated in order to assess the indirect human exposure to antibiotics through consumption of uncooked vegetables. antibiotics in potted plants that had been irrigated with known concentrations of the antibiotics were extracted using accelerated solvent extraction and analyzed on a liq ... | 0 | 27213239 |
| bioavailability and risk assessment of potentially toxic elements in garden edible vegetables and soils around a highly contaminated former mining area in germany. | although soil contamination by potentially toxic elements (ptes) in europe has a history of many centuries, related problems are often considered as having been dealt with due to the enforcement of tight legislations. however, there are many unsolved issues. we aimed to assess pte levels in highly contaminated soils and in garden edible vegetables using human health risk indices in order to evaluate the availability and mobilization of arsenic (as), copper (cu), manganese (mn), mercury (hg), lea ... | 0 | 27117508 |
| stability of carotenoids and tocopherols in ready-to-eat baby-leaf lettuce and salad rocket during low-temperature storage. | minimally processed ready-to-eat baby-leaf vegetables (blvs) are the most convenient source to include the health beneficial bioactive in the daily diet. in the present study, the visual quality and storage stability of carotenoids, tocopherols were investigated in lettuce (green and red romaine) and salad rocket blvs. the commercially packed samples of blvs were stored at 0 °c and 4 °c in dark conditions and analyzed after 0, 2, 4, 8 and 12 days of storage. all the studied samples were found in ... | 0 | 27075434 |
| anti-inflammatory and antioxidant activity of polyphenolic extracts from lactuca sativa (var. maravilla de verano) under different farming methods. | besides their nutritional value, vegetables are a source of health-promoting compounds, such as polyphenols, and their content can be influenced by the particular farming method. in this study polyphenolic extracts from lactuca sativa (var. maravilla de verano) plants cultivated with different farming methods were chemically characterised and tested in vitro and ex vivo inflammation models. | 0 | 26777118 |
| elucidating the genetic basis of antioxidant status in lettuce (lactuca sativa). | a diet rich in phytonutrients from fruit and vegetables has been acknowledged to afford protection against a range of human diseases, but many of the most popular vegetables are low in phytonutrients. wild relatives of crops may contain allelic variation for genes determining the concentrations of these beneficial phytonutrients, and therefore understanding the genetic basis of this variation is important for breeding efforts to enhance nutritional quality. in this study, lettuce recombinant inb ... | 0 | 26640696 |
| dissipation and distribution of chlorpyrifos in selected vegetables through foliage and root uptake. | dissipation, distribution and uptake pathways of chlorpyrifos were investigated in pakchoi (brassica chinensis l.) and lettuce (lactuca sativa) with foliage treatments under a greenhouse trial and root treatments under a hydroponic experiment. the dissipation trends were similar for chlorpyrifos in pakchoi and lettuce with different treatments. more than 94% of chlorpyrifos was degraded in the samples for both of the vegetables 21 days after the foliage treatments. for the root treatment, the di ... | 0 | 26363321 |
| 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 |
| resistance to downy mildew in lettuce 'la brillante' is conferred by dm50 gene and multiple qtl. | many cultivars of lettuce (lactuca sativa l.) are susceptible to downy mildew, a nearly globally ubiquitous disease caused by bremia lactucae. we previously determined that batavia type cultivar 'la brillante' has a high level of field resistance to the disease in california. testing of a mapping population developed from a cross between 'salinas 88' and la brillante in multiple field and laboratory experiments revealed that at least five loci conferred resistance in la brillante. the presence o ... | 2015 | 25915441 |
| host-induced gene silencing inhibits the biotrophic pathogen causing downy mildew of lettuce. | host-induced gene silencing (higs) is an rna interference-based approach in which small interfering rnas (sirnas) are produced in the host plant and subsequently move into the pathogen to silence pathogen genes. as a proof-of-concept, we generated stable transgenic lettuce plants expressing sirnas targeting potentially vital genes of bremia lactucae, a biotrophic oomycete that causes downy mildew, the most important disease of lettuce worldwide. transgenic plants, expressing inverted repeats of ... | 2015 | 25487781 |
| identification of qtls conferring resistance to downy mildew in legacy cultivars of lettuce. | many cultivars of lettuce (lactuca sativa l.), the most popular leafy vegetable, are susceptible to downy mildew disease caused by bremia lactucae. cultivars iceberg and grand rapids that were released in the 18th and 19th centuries, respectively, have high levels of quantitative resistance to downy mildew. we developed a population of recombinant inbred lines (rils) originating from a cross between these two legacy cultivars, constructed a linkage map, and identified two qtls for resistance on ... | 2013 | 24096732 |
| specific in planta recognition of two gklr proteins of the downy mildew bremia lactucae revealed in a large effector screen in lettuce. | breeding lettuce (lactuca sativa) for resistance to the downy mildew pathogen bremia lactucae is mainly achieved by introgression of dominant downy mildew resistance (dm) genes. new bremia races quickly render dm genes ineffective, possibly by mutation of recognized host-translocated effectors or by suppression of effector-triggered immunity. we have previously identified 34 potential rxlr(-like) effector proteins of b. lactucae that were here tested for specific recognition within a collection ... | 2013 | 23883357 |
| effector identification in the lettuce downy mildew bremia lactucae by massively parallel transcriptome sequencing. | lettuce downy mildew (bremia lactucae) is a rapidly adapting oomycete pathogen affecting commercial lettuce cultivation. oomycetes are known to use a diverse arsenal of secreted proteins (effectors) to manipulate their hosts. two classes of effector are known to be translocated by the host: the rxlrs and crinklers. to gain insight into the repertoire of effectors used by b. lactucae to manipulate its host, we performed massively parallel sequencing of cdna derived from b. lactucae spores and inf ... | 2012 | 22293108 |
| molecular diversity at the major cluster of disease resistance genes in cultivated and wild lactuca spp. | diversity was analyzed in wild and cultivated lactuca germplasm using molecular markers derived from resistance genes of the nbs-lrr type. three molecular markers, one microsatellite marker and two scar markers that amplified lrr-encoding regions, were developed from sequences of resistance gene homologs at the main resistance gene cluster in lettuce. variation for these markers were assessed in germplasm including accessions of cultivated lettuce, lactuca sativa l. and three wild lactuca spp., ... | 1999 | 22665172 |
| pathogenic variation and sexual reproduction in swedish populations of bremia lactucae. | the host-pathogen interaction between lettuce (lactuca sativa) and downy mildew (bremia lactucae) is mainly differential and the resistance so far utilized in the host is vertical. as in many other obligate parasites, the introduction of cultivars with new vertical resistance has exerted a strong selection pressure on the pathogen resulting in significant changes in virulence frequencies and in the establishment of races with new combinations of virulence. genetic diversity in pathogen populatio ... | 1985 | 24253122 |
| linkage analysis of genes for resistance to downy mildew (bremia lactucae) in lettuce (lactuca sativa). | the genetics of specific resistance was studied in f2 populations which segregated for either one or two resistance genes. the resistance factors 1, 11 and 14 which had not previously been characterized genetically segregated as single dominant genes (dm). resistance was determined by three linkage groups; r 1/14, 2, 3, and 6 in the first, r 5/8, and 10 in the second and r 4, 7 and 11 in the third. cultivars of lettuce commonly used in the differential series to detect virulence to r3 and r10, w ... | 1985 | 24253062 |
| evidence for a race-specific resistance factor in some lettuce (lactuca sativa l.) cultivars previously considered to be universally susceptible to bremia lactucae regel. | previously undetected race-specific resistance to bremia lactucae (downy mildew) was located in many lettuce cultivars hitherto considered to be universally susceptible to this disease. this resistance factor(s) may also be widely distributed in other cultivars known to carry combinations of already recognised factors r1 to r11. specific virulence to match this resistance is almost invariably present in pathogen collections. this situation may be either a relic of the evolutionary history of the ... | 1981 | 24276692 |
| paecilomyces niveus stolk & samson, 1971 (ascomycota: thermoascaceae) as a pathogen of nasonovia ribisnigri (mosley, 1841) (hemiptera, aphididae) in brazil. | nasonovia ribisnigri is a key pest of lettuce (lactuca sativa l.) in brazil that requires alternative control methods to synthetic pesticides. we report, for the first time, the occurrence of paecilomyces niveus as an entomopathogen of the aphid nasonovia ribisnigri in pinhais, paraná, brazil. samples of mummified aphids were collected from lettuce crops. the fungus p. niveus (paepr) was isolated from the insect bodies and identified by macro and micromorphology. the species was confirmed by seq ... | 2015 | 26602345 |
| 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 |
| fine mapping quantitative resistances to downy mildew in lettuce revealed multiple sub-qtls with plant stage dependent effects reducing or even promoting the infection. | three regions with quantitative resistance to downy mildew of non-host and wild lettuce species, lactuca saligna , disintegrate into seventeen sub-qtls with plant-stage-dependent effects, reducing or even promoting the infection. previous studies on the genetic dissection of the complete resistance of wild lettuce, lactuca saligna, to downy mildew revealed 15 introgression regions that conferred plant stage dependent quantitative resistances (qtls). three backcross inbred lines (bils), carrying ... | 2013 | 24037018 |
| raw and fungal-treated olive-mill wastewater effects on selected parameters of lettuce (lactuca sativa l.) growth--the role of proline. | olive-mill wastewater (omw) constitutes a major agricultural waste stream for which disposal is associated with significant environmental repercussions. no data are available on the effects of biotreated omw and of the protective role of exogenously provided proline on plant physiology. in the present study, omw was administered, either raw or previously treated by the white-rot fungus pleurotus ostreatus, with or without proline amendment, to lettuce plants growing in sterilized sand. biotreate ... | 2012 | 22560036 |
| plant tolerance to mercury in a contaminated soil is enhanced by the combined effects of humic matter addition and inoculation with arbuscular mycorrhizal fungi. | in a greenhouse pot experiment, lettuce plants (lactuca sativa l.) were grown in a hg-contaminated sandy soil with and without inoculation with arbuscular mycorrhizal fungi (amf) (a commercial inoculum containing infective propagules of rhizophagus irregularis and funneliformis mosseae) amended with different rates of a humic acid (0, 1, and 2 g kg(-1) of soil), with the objective of verifying the synergistic effects of the two soil treatments on the hg tolerance of lettuce plants. our results i ... | 2016 | 26931658 |
| transfection of sclerotinia sclerotiorum with in vitro transcripts of a naturally occurring interspecific recombinant of sclerotinia sclerotiorum hypovirus 2 significantly reduces virulence of the fungus. | a recombinant strain of sclerotinia sclerotiorum hypovirus 2 (sshv2) was identified from a north american sclerotinia sclerotiorum isolate (328) from lettuce (lactuca sativa l.) by high-throughput sequencing of total rna. the 5'- and 3'-terminal regions of the genome were determined by rapid amplification of cdna ends. the assembled nucleotide sequence was up to 92% identical to two recently reported sshv2 strains but contained a deletion near its 5' terminus of more than 1.2 kb relative to the ... | 2015 | 25694604 |
| 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 |
| co-composting of spent coffee ground with olive mill wastewater sludge and poultry manure and effect of trametes versicolor inoculation on the compost maturity. | the co-composting of spent coffee grounds, olive mill wastewater sludge and poultry manure was investigated on a semi-industrial scale. in order to reduce the toxicity of the phenolic fraction and to improve the degree of composting humification, composts were inoculated with the white-rot fungus trametes versicolor in the early stages of the maturation phase. during composting, a range of physico-chemical parameters (temperature and both organic matter and c/n reduction), total organic carbon, ... | 2012 | 22537889 |
| 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 |