polyphenolic compounds in date fruit seed (phoenix dactylifera): characterisation and quantification by using fruit seeds have been demonstrated to possess high antioxidant activities due to their high content of flavonoids and phenolic compounds. the objective of this work was to identify and quantify the phenolic composition of date seeds.201424037711
alterations in lignin content and phenylpropanoids pathway in date palm (phoenix dactylifera l.) tissues affected by brittle leaf disease.brittle leaf disease or maladie de la feuille cassante (mfc) is a lethal disorder of date palm that has assumed epidemic proportions in the oases of tunisia and algeria. no pathogen could ever be associated with the disease, while leaflets of affected palms have been previously shown to be deficient in manganese. the work reported here aims to understand the biochemical basis of the date palm response to this disorder. since the typical disease symptom is the leaf fragility, we have investigated ...201323987806
effect of ga3 and 2,4-d foliar application on the anatomy of date palm (phoenix dactylifera l.) seedling leaf.two concentrations (10-5m and 10-3m) of both ga3 and 2,4-d were used as foliar spray to evaluate the response of date palm (phoenix dactylifera l.) cv. khedri seedlings. they affected some of the anatomical characteristics of the first leaf emerging after the beginning of the spray. the high concentration of ga3 increased the size of the midrib and its vascular bundle numbers. both low and high concentrations of 2,4-d inhibited the formation of the midrib. 2,4-d in both low and high concentratio ...201323961229
composition and diversity of weed communities in al-jouf province, northern saudi arabia.the aim of this study was to identify the main weed communities in al-jouf province in northern saudi arabia. moreover, the composition and diversity of these communities were studied in relation to soil variables and crop type. some 54 stands representing olive orchards, date palm orchards, wheat crop and watermelon crop were studied, using ten quadrats (1 × 1 m) per stand. a total of 71 species belonging to 22 families and 61 genera were observed. the classification of vegetation using the two ...201223961198
characterization and evolution of conserved microrna through duplication events in date palm (phoenix dactylifera).micrornas (mirnas) are important regulators of gene expression at the post-transcriptional level in a wide range of species. highly conserved mirnas regulate ancestral transcription factors common to all plants, and control important basic processes such as cell division and meristem function. we selected 21 conserved mirna families to analyze the distribution and maintenance of mirnas. recently, the first genome sequence in palmaceae was released: date palm (phoenix dactylifera). we conducted a ...201323951162
genome sequence of the date palm phoenix dactylifera palm (phoenix dactylifera l.) is a cultivated woody plant species with agricultural and economic importance. here we report a genome assembly for an elite variety (khalas), which is 605.4 mb in size and covers >90% of the genome (~671 mb) and >96% of its genes (~41,660 genes). genomic sequence analysis demonstrates that p. dactylifera experienced a clear genome-wide duplication after either ancient whole genome duplications or massive segmental duplications. genetic diversity analysis indic ...201323917264
a field study on solar-induced chlorophyll fluorescence and pigment parameters along a vertical canopy gradient of four tree species in an urban better understand the potential uses of vegetation indices based on the sun-induced upward and downward chlorophyll fluorescence at leaf and at canopy scales, a field study was carried out in the city of valencia (spain). fluorescence yield (fy) indices were derived for trees at different traffic intensity locations and at three canopy heights. this allowed investigating within-tree and between-tree variations of fy indices for four tree species. several fy indices showed a significant (p < 0 ...201423895782
antioxidant and anti-inflammatory assays confirm bioactive compounds in ajwa date fruit.ajwa, a variety of date palm phoenix dactylifera l., produces the most expensive date fruits. percentages of seed, moisture, fructose, glucose, soluble protein, and fiber in ajwa dates were 13.24, 6.21, 39.06, 26.35, 1.33, and 11.01, respectively. the ethyl acetate, methanolic, and water extracts of ajwa dates, active at 250 μg/ml in the mtt assay, inhibited lipid peroxidation (lpo) by 88, 70, and 91% at 250 μg/ml and cyclooxygenase enzymes cox-1 by 30, 31, and 32% and cox-2 by 59, 48, and 45% a ...201323713661
date (phoenix dactylifera l.) fruit soluble phenolics composition and anti-atherogenic properties in nine israeli (phoenix dactylifera l.) fruit soluble phenolics composition and anti-atherogenic properties were examined in nine diverse israeli grown varieties. ethanol and acetone extracts of 'amari', 'barhi', 'deglet noor', 'deri', 'hadrawi', 'hallawi', 'hayani', 'medjool', and 'zahidi' fruit were analyzed for phenolics composition by rp-hplc and tested for anti-atherogenicity by measuring their effects on ldl susceptibility to copper ion- and free radical-induced oxidation, and on serum-mediated chol ...201323587027
removal of cu2+ and ag+ from aqueous solution on a chemically-carbonized sorbent from date palm leaflets.a chemically-carbonized sorbent was prepared from date palm leaflets by sulphuric acid treatment at 170 degrees c. carbonization took place via the dehydration effect of the hot sulphuric acid producing a carbon with reduction property. sorption of cu2+ and ag+ from aqueous solution was investigated in terms of ph, contact time, metal concentration and temperature. a peculiar behaviour was found for the sorption of the two metals on the produced carbon. sorption of cu2+ was fast, reaching equili ...201323530353
effect of cultivar type and ripening on the polyphenol content of date palm palm (pheonix dactylifera) fruit contains an array of polyphenols, although how these levels alter with cultivar type and fruit ripening is unclear. utilizing hplc and lc-esi-ms/ms, this study define and quantify an array of hydroxybenzoic acids, hydroxycinnamic acids, and flavonoids in three common cultivars of dates (ajwa, barni, and khalas) at the main ripening stages (kimri, khalal, rutab, and tamr). polyphenols were at highest concentration at earlier stages of ripening, with concentra ...201323406291
detailed polyphenol and tannin composition and its variability in tunisian dates (phoenix dactylifera l.) at different maturity stages.the polyphenol profile of two tunisian varieties of dates including flavanols, flavonols, flavones, and hydroxycinnamates was characterized. three tissue zones (flesh, peel, and stone) and three maturity stages were considered. phenolic compounds were analyzed using reversed phase high-performance liquid chromatography coupled to uv-visible and electrospray mass spectrometry. procyanidin oligomers and polymers were characterized and quantified using phloroglucinolysis prior to hplc analysis. pro ...201323374033
use of light traps and differing light color to investigate seasonal abundance of the date palm pest, oryctes agamemnon arabicus (coleoptera: scarabaeidae).oryctes agamemnon arabicus (fairmaire) (coleoptera: scarabaeidae) is a date palm insect pest that causes damage to trunk and roots and can damage grass lawns in the united arab emirates (uae) and other countries such as oman, saudi arabia, and tunisia. the goal of this study was to monitor population dynamics and to evaluate six light colors (white, green, red, yellow, blue, and infrared) and two lamp types (mercury and energy-saving) in light traps. experiments were performed on a date palm far ...201223356071
experimental investigation on gaseous emissions from the combustion of date palm residues in laboratory scale furnace.emissions characteristics from the combustion of five date palm residues, dpr, (date palm leaflets, date palm rachis, date palm trunk, date stones and fruitstalk prunings) in a laboratory scale furnace were investigated. release of gaseous products such as co2, co, voc, nox and so2 were measured at 600-800°c. the main goal was to analyze thermal behaviors and gaseous emissions in order to select the most convenient biofuel for an application in domestic boiler installations. regards to biofuel c ...201323347919
date palm by-products as a new ingredient for the meat industry: application to pork liver pâté.date palm is an interesting source of bioactive compounds that could be used as ingredient in meat products; thus a campagne type pork liver pâté was elaborated using fresh date by-products (0, 5, 10 and 15%). physicochemical properties, pigment and lipid oxidation, residual nitrite level, texture and sensory analysis during 4 days after the elaboration process were evaluated. date paste mostly incorporated moisture, fibre and phenolic compounds. physicochemical parameters, myoglobin content and ...201323314613
identification and characterization of gene-based ssr markers in date palm (phoenix dactylifera l.).date palm (phoenix dactylifera l.) is an important tree in the middle east and north africa due to the nutritional value of its fruit. molecular breeding would accelerate genetic improvement of fruit tree through marker assisted selection. however, the lack of molecular markers in date palm restricts the application of molecular breeding.201223241238
short-term oxidative lime pretreatment of palm pruning waste for use as animal feedstuff.oxidative lime pretreatment (olp) is an effective pretreatment for highly recalcitrant lignocellulosic materials. this experiment was conducted to investigate the effect of short-term olp on fermentative gas production kinetics of date palm prunings. rachis and petiole were pretreated with excess lime (0.5 g ca(oh)2 g(-1) dry matter) in a reactor charged with 10 bar pure oxygen pressure at different times and temperatures.201323239410
male-specific dna markers provide genetic evidence of an xy chromosome system, a recombination arrest and allow the tracing of paternal lineages in date palm.whether sex chromosomes are differentiated is an important aspect of our knowledge of dioecious plants, such as date palm (phoenix dactylifera). in this crop plant, the female individuals produce dates, and are thus the more valuable sex. however, there is no way to identify the sex of date palm plants before reproductive age, and the sex-determining mechanism is still unclear. to identify sex-linked microsatellite markers, we surveyed a set of 52 male and 55 female genotypes representing the ge ...201323231423
effect of water deficit on the cell wall of the date palm (phoenix dactylifera 'deglet nour', arecales) fruit during palm (phoenix dactylifera) is an important crop providing a valuable nutrition source for people in many countries including the middle east and north africa. in recent years, the amount of rain in north africa and especially in the tunisian palm grove areas has dropped significantly. we investigated the growth and cell wall remodelling of fruits harvested at three key development stages from trees grown with or without water supply. during development, cell wall solubilization and remodell ...201323176574
osteitis of the fourth metatarsal caused by a date palm thorn in a child: why the dorsum of the foot is the most commonly injured site.the palms are frequent in the region of eastern morocco. an insidious onset of a lytic lesion in the base of the fourth metatarsal caused by a date palm thorn in a 20-year-old patient is presented. an untreated embedded thorn can cause late complications, including periostitis or osteomyelitis. in most cases, removal of the foreign body is easy, and no surgical care is needed. if detected, these injuries can be treated without complications. in children, however, the diagnosis can be very easily ...201223158504
phylogenetic analysis of microbial communities in different regions of the gastrointestinal tract in panaque nigrolineatus, a wood-eating fish.the neotropical detritivorous catfish panaque nigrolineatus imbibes large quantities of wood as part of its diet. due to the interest in cellulose, hemi-cellulose and lignin degradation pathways, this organism provides an interesting model system for the detection of novel microbial catabolism. in this study, we characterize the microbial community present in different regions of the alimentary tract of p. nigrolineatus fed a mixed diet of date palm and palm wood in laboratory aquaria. analysis ...201223133540
anti-allergic properties of a matured fruit extract of the date palm tree (phoenix dactylifera l.) in mite-sensitized mice.the effects of oral ingestion of a hot water extract of matured fruit of the date palm tree (phoenix dactylifera l.) on allergic responses were investigated in mite-sensitized mice. sneezing and nose rubbing events in mice given a date extract-added diet were significantly lower than in those given an extract-free (control) diet. the serum total and mite antigen-specific immunoglobulin (ig) e levels, and the number of spleen interleukin-4(+)cd4(+), ige(+)b220(+) and fcεriα(+)cd117(+) cells was s ...201223132311
climate change impacts on the future distribution of date palms: a modeling exercise using climex.climate is changing and, as a consequence, some areas that are climatically suitable for date palm (phoenix dactylifera l.) cultivation at the present time will become unsuitable in the future. in contrast, some areas that are unsuitable under the current climate will become suitable in the future. consequently, countries that are dependent on date fruit export will experience economic decline, while other countries' economies could improve. knowledge of the likely potential distribution of this ...201223110162
effects of the ripening stage on phenolic profile, phytochemical composition and antioxidant activity of date palm fruit.four cultivars (gondi, gasbi, khalt dhahbi, and rtob ahmar) of tunisian date palm (phoenix dactylifera l.) fruits at 3 maturation stages, besser, rutab and tamr, were analyzed for their antioxidant activities (aa) using 2,2'-azino-bis (3-ethylbenzothiazoline-6-sulfonic acid) and 2,2-diphenyl-1-picrylhydrazyl radicals cation, and reducing power (rp) methods. the total phenolic (tpc), total flavonoid (tfc), and condensed tannins (ctc) contents were measured. results showed that all samples have th ...201223072597
a sustainable approach to controlling oil a result of the huge economic and environmental destruction from oil spills, studies have been directed at improving and deploying natural sorbents which are not only the least expensive but also the safest means of spill control. this research reviews the limitations and environmental impact of existing cleanup methods. it also justifies the need for concerted research effort on oil spill control using natural and sustainable technology concepts. the article proposes future guidelines for th ...201223037316
enzyme activity and biochemical changes of three date palm cultivars with different softening pattern during ripening.the physicochemical composition changes during palm ripening were studied. the activities of invertase and cell wall-modifying enzymes, namely pectin methylesterase (pme), β-galactosidase (β-gal), endo-1,4-β-d-glucanase (egase), and cellulase were monitored during growth and ripening of shahani, piarom and deiry cultivars with different textures. also, we estimated the concentrations of six organic acids by hplc. reducing sugars, most of organic acid, ph and tss increased up to the full-ripe sta ...201225005944
therapeutic effects of date palm (phoenix dactylifera l.) pollen extract on cadmium-induced testicular toxicity.cadmium (cd) is a well-known testicular toxicant. this study was designed to explore the long-term effects of a single low dose of cd on spermatogenesis, and testicular dysfunction and oxidative stress, and the therapeutic potential of date palm pollen extract (dpp) in averting such reproductive damage. adult male wistar rats received a single intraperitoneal injection of cdcl2 (0 or 1 mg kg(-1) ). twenty-four hours later, they started receiving dpp (0 or 40 mg kg(-1) ) orally, once daily for 56 ...201322998418
estimating sap flux densities in date palm trees using the heat dissipation method and weighing a world of diminishing water reservoirs and a rising demand for food, the practice and development of water stress indicators and sensors are in rapid progress. the heat dissipation method, originally established by granier, is herein applied and modified to enable sap flow measurements in date palm trees in the southern arava desert of israel. a long and tough sensor was constructed to withstand insertion into the date palm's hard exterior stem. this stem is wide and fibrous, surrounded by a ...201222887479
testing the effects of an introduced palm on a riparian invertebrate community in southern california.despite the iconic association of palms with semi-arid regions, most are introduced and can invade natural areas. along the san diego river (san diego, california, usa), the introduced canary island date palm (phoenix canariensis) forms dense patches among native riparian shrubs like arroyo willow (salix lasiolepis). the structural differences between the palm and native shrubs are visually obvious, but little is known about palm's effects on the ecosystem. we tested for the effects of the palm ...201222879991
proteomics analysis of date palm leaves affected at three characteristic stages of brittle leaf disease.proteomics analysis has been performed in leaf tissue from field date palm trees showing the brittle leaf disease (bld) or maladie des feuilles cassantes, the main causal agent of the date palm decline in south tunisia. to study the evolution of the disease, proteins from healthy and affected leaves taken at three disease stages (s1, s2 and s3) were trichloroacetic acid acetone extracted and subjected to two-dimensional gel electrophoresis (5-8 ph range). statistical analysis showed that the pro ...201222843243
allergy to kiwi: is component-resolved diagnosis in routine clinical practice really impossible?kiwi allergy is frequent and can be the result of sensitization to a number of allergens showing different physicochemical characteristics. component-resolved diagnosis of kiwi allergy is still unavailable in routine clinical practice.201222768722
bioactivity of diosmetin glycosides isolated from the epicarp of date fruits, phoenix dactylifera, on the biochemical profile of alloxan diabetic male rats.the new natural flavonoid compounds - diosmetin 7-o-β-l-arabinofuranosyl (1 → 2) β-d-apiofuranoside (1) and diosmetin 7-o-β-d-apiofuranoside (2) - were isolated from the acetone extract of date fruits epicarp belonging to family arecaceae (palmae). elucidation of their chemical structures was determined by different spectroscopic methods in addition to the chemical and physical methods of analysis. these compounds were assessed for their biological activity on alloxan diabetic rats. a dose of 1. ...201322761049
large-scale collection and annotation of gene models for date palm (phoenix dactylifera, l.).the date palm (phoenix dactylifera l.), famed for its sugar-rich fruits (dates) and cultivated by humans since 4,000 b.c., is an economically important crop in the middle east, northern africa, and increasingly other places where climates are suitable. despite a long history of human cultivation, the understanding of p. dactylifera genetics and molecular biology are rather limited, hindered by lack of basic data in high quality from genomics and transcriptomics. here we report a large-scale effo ...201222736259
a rare cause of gastrointestinal phytobezoars: diospyros lotus.diospyros lotus ("wild date palm of trabzon or persimmon"), which has been proven to cause phytobezoars, is a widely consumed fruit in the black sea and northeast anatolia regions of turkey. the aim of the present study was to investigate the effects of diospyros lotus together with other predisposing factors, on the development of gastrointestinal phytobezoars and to discuss the treatment results in comparison to the literature.201222721161
pyrolysis and combustion kinetics of date palm biomass using thermogravimetric analysis.the present research work is probably the first attempt to focus on the kinetics of pyrolysis and combustion process for date palm biomass wastes like seed, leaf and leaf stem by using thermogravimetric analysis (tga) technique. the physical properties of biomass wastes were also examined. proximate and ultimate analysis of the date palm biomass was investigated. ft-ir analysis was conducted to determine possible chemical functional groups in the biomass. results showed that date palm seed and l ...201222705960
a complete sequence and transcriptomic analyses of date palm (phoenix dactylifera l.) mitochondrial genome.based on next-generation sequencing data, we assembled the mitochondrial (mt) genome of date palm (phoenix dactylifera l.) into a circular molecule of 715,001 bp in length. the mt genome of p. dactylifera encodes 38 proteins, 30 trnas, and 3 ribosomal rnas, which constitute a gene content of 6.5% (46,770 bp) over the full length. the rest, 93.5% of the genome sequence, is comprised of cp (chloroplast)-derived (10.3% with respect to the whole genome length) and non-coding sequences. in the non-co ...201222655034
influence of growth regulators on callogenesis and somatic embryo development in date palm (phoenix dactylifera l.) sahelian cultivars.this study provides a physiological analysis of somatic embryogenesis in four elite cultivars of date palms: ahmar, amsekhsi, tijib, and amaside, from the initial callogenesis to establishment and proliferation of embryogenic suspension cultures. somatic embryos development and in vitro plants rooting were also studied. for each step, auxins and cytokinins concentrations were optimised. the primary callogenesis from leaf explants of seedlings appeared highly dependent on genotype. ahmar (80%) an ...201222629211
new microsatellite markers for assessment of genetic diversity in date palm (phoenix dactylifera l.).new primer pairs of genomic dna microsatellite markers were tested to assess the genetic diversity of eleven date palm genotypes. the results indicated that out of thirty, only seven primers (23.3%) failed to amplify the expected pcr fragments, while thirteen primers (43.3%) amplified monomorphic banding patterns and the remaining ten primers (33.4%) generated polymorphic banding patterns. a total of 77 alleles have been observed with a mean of 7.7 alleles per locus. the average of gene diversit ...201122582150
in vitro study on influence of some streptomyces strains isolated from date palm rhizosphere soil on some toxigenic palm (phoenix dactylifera l.) is considered the main crop in deserts and arid areas such as saudi arabia. five streptomyces species and other fungal species were isolated from date palm rhizosphere soil of several cultivars, such as barhi, khalas, sullaj, and sukkari, in the ghat and el-gouf regions. streptomyces strains were isolated on biolog universal growth agar medium and were identified following biolog methods. the predominant streptomyces isolated from this present survey was s. pli ...201222571643
the date palm (phoenix dactylifera l.) micropropagation using completely mature female flowers.this study describes an efficient and reproducible protocol for in vitro date palm propagation using mature female flowers. it focuses on the promising proliferation capacity exhibited by a number of female flower tissues taken at the final developmental stage. this capacity resided in the ability to preserve minuscule zones in a juvenile state located at the floral organ armpits (sepals and petals). the originality of this method lies in the possibility of propagation of very rare varieties, pa ...201222464427
immunological markers in allergic rhinitis patients treated with date palm immunotherapy.allergic rhinitis (ar) is regulated by the local production and release of several cytokines. allergen specific immunotherapy (it) has been widely used for many years as a specific treatment of allergic diseases. this study aimed to investigate the changes in clinical and immunological markers before and after phoenix dactylifera it in ar patients.201222456954
adjusting homestead feeding to requirements and nutrient intake of grazing goats on semi-arid, subtropical highland pastures.intensive livestock grazing can largely deplete the natural fodder resources in semi-arid, subtropical highlands and together with the low nutritional quality of the pasture vegetation limit the growth and production of grazing animals. to evaluate the contribution of homestead feeding of grazing goats to rangeland conservation and animal nutrition, two researcher-managed on-farm trials were conducted in a mountain oasis of northern oman. goats' feed intake on pasture in response to four rations ...201122445414
dietary fiber from tunisian common date cultivars (phoenix dactylifera l.): chemical composition, functional properties, and antioxidant capacity.the dietary fibers (df) of 10 date varieties from tunisian oases have been investigated. further knowledge on the content, composition, and technological applications of those fibers could support their genetic variability and promote the socioeconomical development of growing areas. the composition, water- and oil-holding capacities, solubility, and antiradical activity have been determined. the df content ranged from 4.7% (matteta, rochdi) to >7% (deglé nour, garen gaze, smeti). composition va ...201222443221
a new megastigmane glycoside, phoenixoside a, from phoenix dactylifera.a new megastigmane glycoside, phoenixoside a (1), has been isolated from the n-butanol--soluble fraction of seeds of phoenix dactylifera. the structure was characterized as (6s,7z,9r)-hydroxy-3-oxo-ionol-9-o-beta-d-glucopyranosyl-(1" --> 6')-beta-d-glucopyranoside on the basis of 1d and 2d nmr spectroscopy, high-resolution mass spectrometry, and cd spectroscopy.201222428228
the culturable bacterial community of frass produced by larvae of rhynchophorus ferrugineus olivier (coleoptera: curculionidae) in the canary island date palm.larvae of the red palm weevil (rpw) rhynchophorus ferrugineus olivier (coleoptera: curculionidae) feed inside palm stem tissues, making galleries and producing a wet fermenting frass. we characterized the culturable bacteria associated with frass produced by tunnelling larvae inside the canary island date palms and investigated the role of frass and gut bacteria in plant polymers breakdown.201222404299
processing and utilization of palm date fruits for edible applications.the date palm tree (phoenix dactylifra l., family: palmaceae) is perhaps the oldest and most important fruit crop in the middle east and north africa. from this region, the tree spread to other parts of the world and is cultivated in some parts of usa. about 6-7 million tons of date fruits, belonging to a large variety of cultivars with different characteristics, are produced annually. the date fruit is mainly composed of sugars (invert sugars and/or sucrose) and fiber and, as such, can find a w ...201222360635
high-throughput sequencing-based gene profiling on multi-staged fruit development of date palm (phoenix dactylifera, l.).date palm provides both staple food and gardening for the middle east and north african countries for thousands of years. its fruits have diversified significantly, such as nutritional content, size, length, weight color, and ripping process. dates palm represent an excellent model system for the study of fruit development and diversity of fruit-bearing palm species that produce the most versatile fruit types as compared to other plant families. using roche/454 gs flx instrument, we acquired 7.6 ...201222351158
profilin as an aeroallergen by means of conjunctival allergen challenge with purified date palm profilin.the role of profilin as a food allergen is well established, but little research has been done about its ability to elicit respiratory disease. profilin is considered more of a confounding allergen on skin testing with whole pollen extracts than other airborne allergens. our aim was to find out whether or not profilin can cause symptoms in sensitized individuals, which would be compatible with its role as an airborne allergen.201222269607
comparative demography of the spider mite, oligonychus afrasiaticus, on four date palm varieties in southwestern tunisia.the date palm mite, oligonychus afrasiaticus (mcgregor) (acari: tetranychidae), is a serious pest of palm date fruits. life cycle, fecundity, and longevity of this mite were studied on fruits of four date palms, phoenix dactylifera l. (arecales: arecaceae)(varieties: deglet noor, alig, kentichi, and besser), under laboratory conditions at 27 = 1 °c, 60 ± 10% rh. total development time of immature female was shorter on deglet noor fruits than on the other cultivars. o. afrasiaticus on deglet noor ...201122233420
palm cryobanking.we describe the development of an efficient cryopreservation protocol for proembryogenic masses (pems) of date palm variety 'barhee'. proembryos were induced by inoculating small pieces of juvenile leaves on ms medium supplemented with 0.3 mg per liter 2,4-d. application of these in vitro conditions led to true-to-type plants as observed after plant fructification. when compared to the standard vitrification protocol, the ultra-rapid droplet-vitrification technique proved to be superior. sucrose ...201322227705
date fruits (phoenix dactylifera linn): an emerging medicinal palm is one of the oldest trees cultivated by man. in the folk-lore, date fruits have been ascribed to have many medicinal properties when consumed either alone or in combination with other herbs. although, fruit of the date palm served as the staple food for millions of people around the world for several centuries, studies on the health benefits are inadequate and hardly recognized as a healthy food by the health professionals and the public. in recent years, an explosion of interest in t ...201222214443
ciprofloxacin adsorption from aqueous solution onto chemically prepared carbon from date palm leaflets.a chemically prepared carbon was synthesized from date palm leaflets via sulphuric acid carbonization at 160 degrees c. adsorption of ciprofloxacin (cip) from aqueous solution was investigated in terms of time, ph, concentration, temperature and adsorbent status (wet and dry). the equilibrium time was found to be 48 hr. the adsorption rate was enhanced by raising the temperature for both adsorbents, with adsorption data fitting a pseudo second-order model well. the activation energy, ea, was fou ...201223520864
the use of date palm as a potential adsorbent for wastewater treatment: a tropical countries, the palm tree is one of the most abundant and important trees. date palm is a principal fruit grown in many regions of the world. it is abundant, locally available and effective material that could be used as an adsorbent for the removal of different pollutants from aqueous solution.201222207239
dna-based assays to distinguish date palm (arecaceae) palm (phoenix dactylifera) is one of the oldest cultivated trees and is critical to the development of arid land. the date palm is a dioecious monocot with separate male and female trees. this presents a challenge in development as it is impossible to distinguish trees until they flower approximately five to eight years after planting.201222203652
brittle leaf disease induces an oxidative stress and decreases the expression of manganese-related genes in date palm (phoenix dactylifera l.).in tunisia, date orchards are being decimated by a disease called brittle leaf disease of unknown origin. previous studies reported that affected soils, roots and leaves were manganese deficient. in this study, we investigated the biochemical and molecular response of mfc-affected date palms to the oxidative stress generated by manganese deficiency. both the malondialdehyde (mda) content which is indicative of lipid peroxidation and the activities of antioxidant enzyme were measured in affected ...201222099513
assessing molecular signature for some potential date (phoenix dactylifera l.) cultivars from saudi arabia, based on chloroplast dna sequences rpob and psba-trnh.phoenix dactylifera l. (date palm), being economically very important, is widely cultivated in the middle east and north africa, having about 400 different cultivars. assessment of date cultivars under trading and farming is a widely accepted problem owing to lack of a unique molecular signature for specific date cultivars. in the present study, eight different cultivars of dates viz., khodry, khalas, ruthana, sukkari, sefri, segae, ajwa and hilali were sequenced for rpob and psba-trnh genes and ...201122072924
nitrate removal using different carbon substrates in a laboratory model.agricultural fields have been frequently identified as major contributors of nitrate leaching into surface and ground waters. tile drains can act as direct pathways, transferring leached nitrate to surface water. bioreactor filters are useful for the removal of nitrate from drainage waters; however, these filters require an external carbon supply to sustain denitrification. in this study, four organic carbon sources including wood, barley straw, rice husks, and date palm leaf, were used to enhan ...201122049767
rosaceae-associated exercise-induced anaphylaxis with positive spt and negative ige reactivity to pru p anaphylaxis (fdeia) is characterized by anaphylactic symptoms after exercise following ingestion of food. we present a case of fdeia induced by rosacee fruits showing some diagnostic problems.201121980800
somatic embryogenesis, scanning electron microscopy, histology and biochemical analysis at different developing stages of embryogenesis in six date palm (phoenix dactylifera l.) efficient somatic embryogenesis system has been established in six date palm (phoenix dactylifera l.) cultivars (barhee, zardai, khalasah, muzati, shishi and zart). somatic embryogenesis (se) was growth regulators and cultivars dependent. friable embryogenic callus was induced from excised shoot tips on ms medium supplemented with various auxins particularly 2,4-dichlorophenoxyacetic acid (2,4-d, 1.5 mg 1(-l)). suspension culture increased embryogenesis potentiality. only a-naphthaleneacetic ...201123961149
physical and chemical properties, antioxidant activity, total phenol and mineral profile of seeds of seven different date fruit (phoenix dactylifera l.) varieties.the physical and chemical properties of the date (phoenix dactylifera l.) fruit seeds from seven date samples (soukari, soulag, barhi, khulas, rozaiz, soughi and monaif) were evaluated. energy values of dried and ground seeds were found between 4340 kcal/kg (barhi cv) and 4795 kcal/kg (rozaiz cv). also, while crude oil content of seeds were established between 4.68% (khulas cv) and 7.96% (monaif cv), crude protein contents were found at the levels between 3.71% (soulag cv) and 5.47% (barhi cv). ...201221762027
prevalence of sensitization to lipid transfer proteins and profilins in a population of 430 patients in the south of madrid.lipid transfer proteins (ltps) and profilins are the most important panallergens in the management of patients who are allergic to pollen and plant food in our area. ltps are highly stable proteins that can induce systemic symptoms after ingestion. profilins are labile proteins that are present in pollens and vegetables. considered markers of several types of pollen sensitization, they are responsible for cross-reactivity between pollens and vegetables. the objective of this study was to assess ...201121721373
purification and characterization of membrane-bound peroxidase from date palm leaves (phoenix dactylifera l.).peroxidase from date palm (phoenix dactylifera l.) leaves was purified to homogeneity and characterized biochemically. the enzyme purification included homogenization, extraction of pigments followed by consecutive chromatographies on deae-sepharose and superdex 200. the purification factor for purified date palm peroxidase was 17 with 5.8% yield. the purity was checked by sds and native page, which showed a single prominent band. the molecular weight of the enzyme was approximately 55 kda as es ...201123961138
effects of riyadh cement industry pollutions on some physiological and morphological factors of datura innoxia mill. plant.cement factory emissions into air cause serious air pollution and affect the plant and animal life in the environment. herein, we report the effects of cement industry emissions (o3, so2 and no2) in air, as pollutants, at riyadh city on datura innoxia mill. plant. morphological characters including plant height, leaves area and number, fresh and dry weight of shoot and root systems of d. innoxia showed a significant reduction from their normal control plants as a response to exposure to pollutan ...201123961129
comparative transcriptome and metabolite analysis of oil palm and date palm mesocarp that differ dramatically in carbon partitioning.oil palm can accumulate up to 90% oil in its mesocarp, the highest level observed in the plant kingdom. in contrast, the closely related date palm accumulates almost exclusively sugars. to gain insight into the mechanisms that lead to such an extreme difference in carbon partitioning, the transcriptome and metabolite content of oil palm and date palm were compared during mesocarp development. compared with date palm, the high oil content in oil palm was associated with much higher transcript lev ...201121709233
multiple bud cultures of 'barhee' date palm (phoenix dactylifera) and physiological status of regenerated plants.adventitious bud clusters of date palm 'barhee' were successfully established from juvenile leaves (<1cm) using reduced amounts of 2,4-d (0.2mgl(-1)) to limit the risk of somaclonal variation. an average of 8.4 adventitious buds per explant were obtained. histological examination showed that the superficial cell layers of leaves had the highest caulogenic capacity. high sucrose concentration (70gl(-1)) was used for the conversion of initial buds to multiple bud clusters. the promoting effect of ...201121641674
de novo genome sequencing and comparative genomics of date palm (phoenix dactylifera).date palm is one of the most economically important woody crops cultivated in the middle east and north africa and is a good candidate for improving agricultural yields in arid environments. nonetheless, long generation times (5-8 years) and dioecy (separate male and female trees) have complicated its cultivation and genetic analysis. to address these issues, we assembled a draft genome for a khalas variety female date palm, the first publicly available resource of its type for a member of the o ...201121623354
nutritional quality of 18 date fruit varieties.the aim of the present study was to analyze and compare the chemical and physical properties of 18 varieties of the date fruits from date palm (phoenix dactylifera), which are regarded as popular fruit commodities among the populace of the middle eastern peninsula. dietary fiber, proximate analysis, micronutrients (micro-elements and macro-elements) and physical properties (weight, length, and density) of the selected 18 leading varieties of dates cultivated in the united arab emirates-namely kh ...201121495898
determination of heavy metals in the fruit of date palm growing at different locations of riyadh.exposure of heavy metals to human beings has risen dramatically in the last 50 years. in today's urban and industrial society, there is no escaping from exposure to toxic chemicals and heavy metals. humans are more likely to be exposed to heavy metal contamination from the dust that adheres to edible plants than from bioaccumulation. this is because it is very difficult to wash off all the dust particles from the plant material before ingesting them. the objectives of this experiment were to det ...201123961121
date palm (phoenix dactylifera l.) leaves as biomonitors of atmospheric metal pollution in arid and semi-arid environments.the leaves of date palms were evaluated as a possible biomonitor of heavy metal contamination in ma'an city, jordan. concentrations of (fe), (pb), (zn), (cu), (ni), and (cr) were determined in washed and unwashed leaves and soil samples collected from different sites with different degrees of metal contamination (urban, suburban, industrial, highway and rural sites); separate leaves were taken from outside the city to be used as a control sample. samples collected from industrial sites were foun ...201121421278
the mn-binding proteins of the photosystem ii oxygen-evolving complex are decreased in date palms affected by brittle leaf disease.brittle leaf disease or maladie des feuilles cassantes (mfc) is a disorder affecting date palms (phoenix dactylifera l.) which after a long declining process eventually leads to the death of the plant. no causal agent for the disease has been found so far but leaflets of affected palms are mn-deficient despite the existence of adequate exchangeable mn in the soils in which affected palms grow. the disease is specifically associated with an increase in a series of chloroplastic rnas. a proteomic ...201121371899
clinical profile of a mediterranean population sensitised to date palm pollen (phoenix dactylifera). a retrospective palm pollen allergy is frequently associated with polysensitisation. observational studies have suggested that date-palm-sensitised individuals could be included in a distinct group of polysensitised patients. the objectives of the study were to analyse the clinical characteristics of a group of patients diagnosed of date-palm pollen allergy and to compare them with pollen allergic patients without date-palm sensitisation.201121354689
periostitis of the metatarsal caused by a date palm thorn in a child: a case palm thorn injuries are common in middle eastern countries, where there are many date palm plantations. if detected, these injuries can be treated without subsequent complications. in children, however, the diagnosis can very easily be missed. an untreated embedded thorn may cause late complications, including periostitis or osteomyelitis. in this article, the author presents a case of date palm thorn-induced periostitis of the fourth metatarsal. the lesion was successfully treated in this ...201621354009
the effect of late pregnancy consumption of date fruit on labour and delivery.we set out to investigate the effect of date fruit (phoenix dactylifera) consumption on labour parameters and delivery outcomes. between 1 february 2007 and 31 january 2008 at jordan university of science and technology, a prospective study was carried out on 69 women who consumed six date fruits per day for 4 weeks prior to their estimated date of delivery, compared with 45 women who consumed none. there was no significant difference in gestational age, age and parity between the two groups. th ...201121280989
experimental evaluation of eco-friendly flocculants prepared from date palm rachis.sodium carboxymethylcellulose (cmcna) is an anionic water soluble polyelectrolyte widely used in many industrial sectors including food, textiles, papers, adhesives, paints, pharmaceuticals, cosmetics and mineral processing. cmcna was produced by chemical modification of cellulose, and represents many advantages: natural, renewable, non-toxic and biodegradable. in this study, different kinds of cmcna, prepared from an agricultural waste date palm rachis, were tested as eco-friendly flocculants f ...201021235183
performance evaluation of three different types of local evaporative cooling pads in greenhouses in sudan.this study was conducted in date palm technology company limited, shambat, khartoum state. to evaluate performance of three types of evaporative cooling pads for greenhouses (celdek pads, straw pads and sliced wood pads), as compared to the conditions outside the greenhouses (control), for pads. performance evaluation includes environmental parameters (temperature and relative humidity at 8 am, 1 pm and 6 pm) and crop parameters (length and stem diameter, leaves number and width, fruit length an ...201123961103
divergent expression patterns of mir164 and cup-shaped cotyledon genes in palms and other monocots: implication for the evolution of meristem function in order to understand how the morphology of plant species has diversified over time, it is necessary to decipher how the underlying developmental programs have evolved. the regulatory network controlling shoot meristem activity is likely to have played an important role in morphological diversification and useful insights can be gained by comparing monocots and eudicots. these two distinct monophyletic groups of angiosperms diverged 130 ma and are characterized by important differences in their ...201121135149
a simple method for dna extraction from mature date palm leaves: impact of sand grinding and composition of lysis buffer.molecular marker techniques have been widely used for cultivar identification of inbred date palms (phoenix dactylifera l.; arecaceae) and biodiversity conservation. isolation of highly pure dna is the prerequisite for pcr amplification and subsequent use such as dna fingerprinting and sequencing of genes that have recently been developed for barcoding. to avoid problems related to the preservation and use of liquid nitrogen, we examined sterile sand for grinding the date palm leaves. individual ...201020957085
multidetector ct for thorn (wooden) foreign bodies of the knee.thorn (wooden) foreign bodies of the knee present a challenge in their diagnosis. partly because of inaccurate history and sometimes a long duration of symptoms, radiographs are negative and mri may show synovitis without a specific pathology.201120953763
on the cover - date palm. 201020934623
cell cycle arrest characterizes the transition from a bisexual floral bud to a unisexual flower in phoenix dactylifera.phoenix dactylifera (date palm) is a dioecious species displaying strong dimorphism between pistillate and staminate flowers. the mechanisms involved in the development of unisexual flowers are as yet unknown.201020534596
fumigation characteristics of ozone in postharvest treatment of kabkab dates (phoenix dactylifera l.) against selected insect infestation.methyl bromide fumigation, the most accepted quarantine treatment for dates and many other dried commodities, will be phased out by 2015 worldwide. as a result, there is a critical need to develop durable alternatives for methyl bromide as postharvest treatments of agricultural commodities. this article presents a new method for postharvest treatment of kabkab dates (phoenix dactylifera l.) by application of gaseous ozone to reduce or eliminate all life stages (adults, larvae, and eggs) of india ...201020377969
comparison of antioxidant activity and total phenol contents of some date seed varieties from iran.the genus phoenix is one of the most widely cultivated groups of palms around the world. the aim of this study was to determine the antioxidant activity and total phenolic compounds of 14 different varieties of date palm (phoenix dactylifera l., arecaceae) seed extracts with 5 solvents [water, methanol, methanol (50%), dmso, and water: methanol: acetone: formic acid (20:40:40:0.1)]. ferric reducing antioxidant power assay and folin-ciocalteu reagent was used for determination of the antioxidant ...201024363720
assessment of genetic fidelity of micropropagated date palm (phoenix dactylifera l.) plants by rapd and issr markers assay.rapd (random amplified polymorphic dna) and issr (inter-simple sequence repeats) markers assay were employed to validate the genetic stability of date palm (phoenix dactylifera l.) plants multiplied through somatic embryogenesis with upto forty two in vitro subcultures. out of the 160 rapd and 21 issr primers screened, 30 rapd and 12 issr primers produced a total of 347 (246 rapds + 101 issrs) clear, distinct and reproducible amplicons, which were monomorphic across all micropropagated plants (2 ...201023572971
effect of processing of dates into date juice concentrate and appraisal of its quality palm (phoenix dactylifera) is widely cultivated in kutch district of gujarat and the fruits are harvested at immature stage before the onset of monsoon to prevent spoilage. the immature date fruits with less commercial value were used for processing into date juice concentrate. immature dates were crushed and treated with 0.1% pectinase enzyme for 120 min to obtain maximum juice. date juice was found to be rich in reducing sugars (16.1%) and total sugars (18.3%). juice was pasteurized at 85 ...201023572618
identification of 2 new allergens of phoenix dactylifera using an immunoproteomics approach.the date palm (phoenix dactylifera) has a wide geographical distribution (middle east, mediterranean, central africa, western asia, australia, and north america). pho d 2, the major allergen of date palm pollen was recently identified as a profilin, yet little is known about the nature of the other pollen allergens from this tree. the objective of this study was to characterize clinically significant allergens other than profilins from p. dactylifera pollen using immunoproteomics. in order to re ...200920128428
chemical composition and pulping of date palm rachis and posidonia oceanica--a comparison with other wood and non-wood fibre the present paper, the valorisation of two residues: posidonia oceanica and date palm rachis was investigated. first, their chemical composition was studied and showed that they present amounts of holocellulose, lignin and cellulose similar to those encountered in softwood and hardwood. extractives in different solvents and ash contents are relatively high. moreover, ash composition assessment showed that silicon is the major component (17.7%) for p. oceanica. the high ash quantity and the lo ...201019766481
simple phenolic composition, flavonoid contents and antioxidant capacities in water-methanol extracts of tunisian common date cultivars (phoenix dactylifera l.).the purpose of this study was to determine and compare the phenolic acid composition, flavonoid content and antioxidant activity of fruits from common date cultivars. the simple phenolic content ranged from 15.73 (mermella variety) to 54.66 mg/100 g fresh weight (korkobbi variety). korkobbi had also the highest content of total flavonoids (54.46 quercetin equivalents/100 g fresh weight). the percentage of inhibition can reach 83% in the lipoperoxyl radical of the korkobbi variety, while it was a ...200919736597
effects of date ( phoenix dactylifera l., medjool or hallawi variety) consumption by healthy subjects on serum glucose and lipid levels and on serum oxidative status: a pilot study.the present pilot study analyzed, for the first time, the in vivo effect of medjool or hallawi date consumption by healthy subjects on serum glucose, lipids, and oxidative stress. total phenolics concentration in the hallawi versus medjool dates was greater by 20-31%. the major proportion of the soluble phenolics in both date varieties consisted of phenolic acids, mainly ferulic acid and coumaric acid derivatives, and also chlorogenic and caffeic acid derivatives. unlike the medjool dates, halla ...200919681613
taphonomy of the early miocene flora, hiwegi formation, rusinga island, kenya.a fossil flora was collected in situ from early miocene deposits at site r117 in the hiwegi formation of rusinga island contemporaneous with and in close proximity to the sites from where the anthropoid primates were recovered. the flora exhibits a spatially and temporally patchy distribution of fruits and seeds, mixed with twigs of various sizes, fragments of wood, bark, and leaves, all with random orientations and very low depositional dips. there has been minimal transport and the flora evide ...200919576619
biosorption characteristics of phosphates from aqueous solution onto phoenix dactylifera l. date palm fibers.phosphates are very important basic materials in agricultural and other industrial applications. the removal of phosphates from surface waters is generally necessary to avoid problems, such as eutrophication, particularly near urban areas. this paper is focused on the sorption of po4(3-) ions from aqueous solution onto date palm fibers as a raw, natural and abundantly materials. a series of batch tests were conducted and the influence of contact time, initial phosphate concentration, ph of the s ...200919497666
evaluation of commercial and field-expedient baited traps for house flies, musca domestica l. (diptera: muscidae).a comparison of nine commercial baited fly traps on florida dairy farms demonstrated that terminator traps collected significantly more (13,323/trap) house flies (musca domestica l.) than the others tested. final flight, fly magnet, and fliesbegone traps collected intermediate numbers of flies (834-2,166), and relatively few were caught with isca, advantage, fermone big boy, squeeze & snap, or oakstump traps (<300). terminator traps collected about twice as many flies (799.8/trap) as fliesbegone ...200920836809
component-resolved diagnosis of plant food allergy by spt.fruits and vegetables may contain both labile and stable allergens. the former induce only oas, whereas stable allergens may induce systemic reactions. component-resolved diagnosis (crd) of allergy to plant foods is therefore essential for the clinical management of allergic patients.200819227646
fatty acids, sterols, phenols and antioxidant activity of phoenix theophrasti fruits growing in crete, the present study we report the chemical composition of the cretan phoenix theophrasti gr. fruits, in comparison with dates, from its close relative phoenix dactylifera l. for their nutritional value and their potential exploitation as a source of bioactive components such as phytosterols, lipids and polyphenols. the non polar dichloromethane (ch2cl2) extract of the fruits was analysed by several techniques (tlc, cc, gc and gc-ms) and was found to consist mainly from fatty acids, hydrocarbons ...200919030994
orthopaedic manifestations of date thorn injury: case palm thorn injuries are common in middle eastern countries where there are many date palm plantations. most of the injuries happen to workers in the plantation or to children. injuries, if detected, can be treated without subsequent complications, but in children the diagnosis can very easily be missed resulting in late complications. the hand, being the most exposed part of the body, is the most affected. embedded thorns can produce lesions mimicking those of osteomyelitis. the foot is exp ...200821748083
nutritional and functional properties of dates: a review.this review article provides information on the nutritional and functional constituents of dates (phoenix dactylifera l.) and their seeds from over 80 references. date flesh is found to be low in fat and protein but rich in sugars, mainly fructose and glucose. it is a high source of energy, as 100 g of flesh can provide an average of 314 kcal. ten minerals were reported, the major being selenium, copper, potassium, and magnesium. the consumption of 100 g of dates can provide over 15% of the reco ...200818949591
a set of novel rnas transcribed from the chloroplast genome accumulates in date palm leaflets affected by brittle leaf disease.brittle leaf disease or maladie des feuilles cassantes (mfc) is a lethal disorder of date palms that has assumed epidemic proportions in the oases of southern tunisia. after a prolonged period during which palms are declining, the disease ends with the death of the palms. whereas no pathogen could ever be associated with the disease, leaflets of affected palms have been previously shown to be deficient in manganese. analysis of rna preparations from leaflets of mfc-affected palms revealed the pr ...200818944085
nutritional quality evaluation of eighteen date pit varieties.the pits from date palm fruits (phoenix dactylifera l.) are nutrient dense but the nutrient composition across varieties has not been extensively studied. in the present study, 18 leading varieties of date pits from date fruits cultivated in the united arab emirates (khalas, barhe, lulu, shikat alkahlas, sokkery, bomaan, sagay, shishi, maghool, sultana, fard, maktoomi, naptit saif, jabri, kodary, dabbas, raziz and shabebe) were analyzed and compared for their chemical and physical properties. di ...200918925479
in vitro hermaphrodism induction in date palm female flower.this study explores and reports on the gain brought to the morphogenetic aptitude of female date palm inflorescences through in vitro hermaphrodism induction. it investigates the main factors involved in the process of sex modification through hormonal induction, such as the floral developmental stage and hormone combination and concentration. it demonstrates that the vestigial stamens (staminodes) of female date palm flowers display a new and high capacity to proliferate under particular in vit ...200918820934
optimization of rna isolation from brittle leaf disease affected date palm leaves and construction of a subtractive cdna library.a simple and efficient method was described here for the isolation of high-quality rna from date palm leaves affected with brittle leaf disease (bld) and containing high amount of phenolic compounds. the procedure was based on the use of a non-ionic detergent nonidet-p40 (np-40), polyvinylpyrrolidone (pvp), and beta-mercaptoethanol in the extraction buffer in order to isolate cytoplasmic rna and to prevent the oxidation of phenolic compounds. this method allowed the isolation of intact rna, suit ...200918815905
physico-chemical characteristics and total quality of date palm varieties grown in the southern of tunisia.the date palm, phoenix dactylifera, is a palm extensively cultivated for its edible fruit. the chemical composition and the water content of ten tunisian date varieties were determined. for all analysis, the deglet nour variety was taken as reference. compositional analysis showed that the littoral varieties were very rich in reducing sugars (26 to 51%) than deglet nour which was rich in sucrose (54%). the relative results of the moisture content showed that the littoral varieties were classifie ...200818810969
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