Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
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| genetic and in silico comparative mapping of the polyphenol oxidase gene in bread wheat (triticum aestivum l.). | polyphenol oxidases (ppos) are involved in the time-dependent darkening and discolouration of asian noodles and other wheat end products. in this study, a doubled haploid (dh) population derived from chara (moderately high ppo activity)/ww2449 (low ppo activity) was screened for ppo activity based on l-dopa and l-tyrosine assays using whole seeds. both these assays were significantly genetically correlated (r = 0.91) in measuring the ppo activity in this dh population. quantitative trait loci (q ... | 2005 | 15918034 |
| assessing the impact of ambient ozone on growth and productivity of two cultivars of wheat in india using three rates of application of ethylenediurea (edu). | three rates of ethylenediurea were used to assess the impact of ambient ozone on growth and productivity of wheat (triticum aestivum l) cultivars "malviya 533" (m 533) and "malviya 234" (m 234) at a suburban site near varanasi, india, beginning in december. wheat plants were treated with edu at 0, 150, 300 and 450 ppm as soil drenches at 10-day intervals. edu treatment affected plant growth, with effects varying with cultivar, age, and edu concentration. seed yield was improved for m 533 at 150 ... | 2005 | 15922496 |
| the possibility of useful usage of biodegradation products of sunflower plants. | heads of sunflower (helianthus annuus l.) were first biodegraded at 55 degrees c by their microflora. biodegradation products of sunflower heads (bpsh) were analyzed. they were found to contain 9.77% dry matter, 3.98% total ash, 3.18% crude protein and 5.75% total organic matter. bod load was determined as 4.80 g/100 g. subsequently, the effects of bpsh at various concentrations (1.0%, 2.5%, 10% and 100%) on the seed germination and some growth parameters of phaseolus vulgaris l., cicer arietinu ... | 2006 | 15922594 |
| effects of herbicide chlorimuron-ethyl on physiological mechanisms in wheat (triticum aestivum). | changes in the activity of antioxidant enzymes including peroxidases (pod) and superoxide dismutases (sod) and in the contents of chlorophyll (chl), malondialdehyde (mda), and soluble proteins (sp) in wheat (triticum aestivum) under the stress of chlorimuron-ethyl in soil were examined. chlorimuron-ethyl induced oxidative stress that was indicated by elevated mda content in leaves and roots after a 1-day exposure. the 300-microg/kg chlorimuron-ethyl treatment caused significant damage to chl acc ... | 2006 | 15925408 |
| lmw-gs genes in agropyron elongatum and their potential value in wheat breeding. | to study the usefulness of low-molecular-weight glutenin subunits (lmw-gs) of agropyron elongatum (host) nevski to wheat (triticum aestivum l.) quality improvement, we characterized lmw-gs genes of a. elongatum. nine lmw-gs genes of a. elongatum, which were named ael1 to ael9, were cloned by genomic pcr. after sequencing, we obtained complete open reading frames from ael2 to ael8 and partial genes of ael1 and ael9. all nine sequences are homoeologous to those of wheat and related grasses. compar ... | 2005 | 15926075 |
| organic acid secretion as a mechanism of aluminium resistance: a model incorporating the root cortex, epidermis, and the external unstirred layer. | the resistance of some plants to al (aluminium or aluminum) has been attributed to the secretion of al(3+)-binding organic acid (oa) anions from the al-sensitive root tips. evidence for the 'oa secretion hypothesis' of resistance is substantial, but the mode of action remains unknown because the oa secretion appears to be too small to reduce adequately the activity of al(3+) at the root surface. in this study a mechanism for the reduction of al(3+) at the root surface and just beneath the epider ... | 2005 | 15928019 |
| 137cs-uptake into wheat (triticum vulgare) plants from five representative soils of bangladesh. | a pot experiment was conducted to study the uptake of 137cs by wheat grown in five representative soils of bangladesh having different soil characteristics. artificial application of 137cs increased the activity in soils up to 45.9 bq/kg soil, measured at the end of the harvest of wheat crop. different plant parts had different ability to accumulate 137cs. grains had the least activity and transfer factor, while the highest activity and lowest transfer factor were measured in roots, which restri ... | 2005 | 15931978 |
| introgression of the haynaldia villosa genome into gamma-ray-induced asymmetric somatic hybrids of wheat. | to study the effect of gamma-ray treatment on donor and derived somatic hybrids, we carried out gamma-ray donor treatment experiments with a wide range of gamma-ray dosages and asymmetric somatic hybridization between protoplasts of wheat (triticum aestivum l. jinan 177) and protoplasts of haynaldia villosa schur. treated with different dosages of gamma-rays (40, 60 and 80 gy, respectively). we first screened the putative hybrids by isozyme analysis, followed by characterization of nuclear and o ... | 2005 | 15933881 |
| changes in spectral reflectance of wheat leaves in response to specific macronutrient deficiency. | in wheat (triticum aestivum l.) plants, deficiency of an essential element may drastically affect growth, appearance, and most importantly yield. wheat, the focus of this study, is one of the crops studied in the celss program. information about nutrient deficiencies in crops grown in controlled environment is essential to optimize food productivity. the main objective of this study was to determine whether deficiency of nitrogen (n), phosphorus (p), potassium (k), calcium (ca) and magnesium (m) ... | 2005 | 15934211 |
| some structural properties of plant serine:glyoxylate aminotransferase? | the structural properties of photorespiratory serine:glyoxylate aminotransferases (sgat, ec 2.6.1.45) from maize (zea mays l.) and wheat (triticum aestivum l.) leaves were examined. by means of molecular sieving on zorbax se-250 column and filtration through centrifugal filters it was shown that dimers of wheat enzyme (molecular mass of about 90 kda) dissociate into component monomers (molecular mass of about 45 kda) upon decrease in ph value (from 9.1 or 7.0 to 6.5). at ph 9.1 a 50-fold decreas ... | 2005 | 15940352 |
| isolation and expression analysis of genes encoding dna methyltransferase in wheat (triticum aestivum l.). | dna methylation of cytosine residues, catalyzed by dna methyltransferases, is suggested to play important roles in regulating gene expression and plant development. in this study, we isolated four wheat cdna fragments and one cdna with open reading frame encoding putative dna methyltransferase and designated tamet1, tamet2a, tamet2b, tacmt, tamet3, respectively. blastx searches and phylogenetic analysis suggested that five cdnas belonged to four classes (dnmt1, dnmt2, cmt and dnmt3) of dna methy ... | 2005 | 15946751 |
| molecular mapping of fusarium head blight resistance in the winter wheat population dream/lynx. | fusarium head blight (fhb), mainly caused by fusarium graminearum and f. culmorum, can significantly reduce the grain quality of wheat (triticum aestivum l.) due to mycotoxin contamination. the objective of this study was to identify quantitative trait loci (qtls) for fhb resistance in a winter wheat population developed by crossing the resistant german cultivar dream with the susceptible british cultivar lynx. a total of 145 recombinant inbred lines (rils) were evaluated following spray inocula ... | 2005 | 15947905 |
| intragenic diversity and functional conservation of the three homoeologous loci of the kn1-type homeobox gene wknox1 in common wheat. | common wheat represents a typical allohexaploid species and provides a good experimental system for studying genomic alterations associated with allopolyploidization. we studied three homoeologous loci of wheat wknox1 gene, which is highly homologous to the knotted1 (kn1)-like homeobox (knox) genes functioning at shoot apical meristems (sam). wknox1 transcripts were detected in sam, and its overexpression caused abnormal leaf morphology with occasional ectopic leaves in transgenic tobacco plants ... | 2005 | 15952073 |
| characterization of wheat gliadin proteins by combined two-dimensional gel electrophoresis and tandem mass spectrometry. | a proteomics-based approach was used for characterizing wheat gliadins from an italian common wheat (triticum aestivum) cultivar. a two-dimensional gel electrophoresis (2-de) map of roughly 40 spots was obtained by submitting the 70% alcohol-soluble crude protein extract to isoelectric focusing on immobilized ph gradient strips across two ph gradient ranges, i.e., 3-10 or ph 6-11, and to sodium dodecyl sulfate-polyacrylamide electrophoresis in the second dimension. the chymotryptic digest of eac ... | 2005 | 15952231 |
| analysis of recombination and gene distribution in the 2l1.0 region of wheat (triticum aestivum l.) and barley (hordeum vulgare l.). | both wheat and barley belong to tribe triticeae and are closely related. high-density detailed comparison of physical and genetic linkage maps revealed that wheat genes are present in physically small gene-rich regions (grrs). one of the largest grrs is located around fraction length 1.0 of the long arm of wheat homoeologous group 2 chromosomes termed the "2l1.0 region." the main objective of this study was to analyze the structural and functional organization of the 2l1.0 region in barley in co ... | 2005 | 15953539 |
| effects of food deprivation and particle size of ground wheat on digestibility of food components in broilers fed on a pelleted diet. | the first aim of the experiment was to study the effect of wheat (triticum aestivum) particle size on the digestibility of starch in a pelleted diet given to broilers. the second aim was to study the consequences of food deprivation before the excreta collection period (from 21 to 24 d). wheat from a strong hardness cultivar was incorporated at 546.1 g/kg in diets. the other main ingredients were soybean meal (353.5 g/kg) and rapeseed oil (55.0 g/kg). diets were given as pellets. the experimenta ... | 2005 | 15957444 |
| [fragment length polymorphism of wx-b1 gene digested by bamhi and its relation to amylose content of wheat]. | there are two types of starch, amylose and amylopectin of flour. amylose content (ac) is significantly negatively correlated with noodle quality. the waxy gene (wx) encodes the granule-bound starch synthase (gbss, ec 3.4.1.11), or wx protein, is responsible for the synthesis of amylose in wheat. common wheat is allohexaploid, it has three different wx proteins: wx-a1, wx-b1, and wx-d1. consequently, amylose content and pasting properties of starch were influenced by the lack of the wx-b1 protein ... | 2005 | 15961901 |
| selective transport of zinc, manganese, nickel, cobalt and cadmium in the root system and transfer to the leaves in young wheat plants. | the uptake, translocation and redistribution of the heavy metals zinc, manganese, nickel, cobalt and cadmium are relevant for plant nutrition as well as for the quality of harvested plant products. the long-distance transport of these heavy metals within the root system and the release to the shoot in young wheat (triticum aestivum 'arina') plants were investigated. | 2005 | 15965269 |
| probing the cell wall heterogeneity of micro-dissected wheat caryopsis using both active and inactive forms of a gh11 xylanase. | the external envelope of wheat grain (triticum aestivum l. cv. isengrain) is a natural composite whose tissular and cellular heterogeneity constitute a significant barrier for enzymatic cell wall disassembly. to better understand the way in which the cell wall network and tissular organization hamper enzyme penetration, we have devised a strategy based on in situ visualization of an active and an inactive form of a xylanase in whole-wheat bran and in three micro-dissected layers (the outer bran, ... | 2005 | 15965663 |
| microgravity does not alter plant stand gas exchange of wheat at moderate light levels and saturating co2 concentration. | plant stand gas exchange was measured nondestructively in microgravity during the photosynthesis experiment subsystem testing and operations experiment conducted onboard the international space station. rates of evapotranspiration and photosynthesis measured in space were compared with ground controls to determine if microgravity directly affects whole-stand gas exchange of triticum aestivum. during six 21-day experiment cycles, evapotranspiration was determined continuously from water addition ... | 2005 | 15968511 |
| molecular mapping of gibberellin-responsive dwarfing genes in bread wheat. | opportunities exist for replacing reduced height (rht) genes rht-b1b and rht-d1b with alternative dwarfing genes for bread wheat improvement. in this study, the chromosomal locations of several height-reducing genes were determined by screening populations of recombinant inbred lines or doubled haploid lines varying for plant height with microsatellite markers. linked markers were found for rht5 (on chromosome 3bs), rht12 (5al) and rht13 (7bs), which accounted for most of the phenotypic variance ... | 2005 | 15968526 |
| [asymmetric somatic hybridization between mixed wheat and psathyrostachys juncea]. | psathyrostachys juncea is a potential source of useful genes, such as the barley yellow dwarf virus resistance, salt tolerance and drought tolerance, for wheat improvement. conventional sexual hybridization between wheat and psathyrostachys juncea is very difficult to occur as the two are sexual incompatible. somatic hybridization is a promising technique for creating hybrids across the sexual border. here we report a fusion system for somatic hybridization of wheat using peg method. mixed proto ... | 2004 | 15968998 |
| investigation on dynamic changes of photosynthetic characteristics of 10 wheat (triticum aestivum l.) genotypes during two vegetative-growth stages at water deficits. | drought is a worldwide problem, seriously influencing plant (crop) productivity. wheat is a stable food for 35% of the world population, and moreover, about 60% of land area on the globe belongs to arid and semiarid zone. wheat drought resistance is a multi-gene controlling quantitative character and wheat final production in field is realized mainly by physiological regulation under the condition of multi-environmental factor interaction. exploring drought resistance physiological mechanisms fo ... | 2005 | 15975772 |
| [on antimutagenesis mechanism in plants]. | the effect of nitrosylmethylurea (nmu) on the mitotic index and the frequency of cells with aberrations, as well as the effects of pre- and posttreatment with antioxidant ambiol on the nmu effects were studied on seedlings of common winter wheat triticum aestivum, cultivar moskovskaya 39. both pre- and posttreatment with ambiol resulted in antimutagenic effect but after posttreatment, the effect was lower. irrespective of type of seedling treatment with ambiol and the time of their fixation (45, ... | 2005 | 15977820 |
| wheat genome structure: translocations during the course of polyploidization. | the genomic organization of triticum timopheevii (2n=28, atatgg) was compared with hexaploid wheat t. aestivum (2n=42, aabbdd) by comparative mapping using microsatellites derived from bread wheat. genetic maps for the two crosses t. timopheevii var. timopheevii x t. timopheevii var. typica and t. timopheevii k-38555xt. militinae were constructed. on the first population, 121 loci were mapped, and on the second population 103 loci. the transferability of the wheat markers to t. timopheevii was g ... | 2006 | 15983785 |
| structural changes of plant residues during decomposition in a compost environment. | the degradation of plant material during composting was investigated qualitatively by scanning electron microscopy (sem) and quantitatively by chemical methods. decomposition of miscanthus (miscanthus oogiformis l.), hemp (cannabis sativa l.) and wheat (triticum aestivum l.) straw was observed by placing litterbags containing these materials in compost piles. hemp and miscanthus straw were more stable than wheat straw, but the two materials differed in the way they were degraded despite similar ... | 2006 | 15990291 |
| impact of fusarium culmorum on the polysaccharides of wheat flour. | to assess the effects of fusarium infection on the polysaccharides of winter wheat grain (triticum aestivum l.), grain samples obtained from plants artificially inoculated with fusarium culmorum were analyzed. microscopy revealed obvious damage to the starch granules in the seriously infected samples. the fusarium infection had no analytically detectable influence on the starch and total insoluble dietary fiber content of the wheat grain. there were significantly positive relationships between a ... | 2005 | 15998153 |
| stable barley chromosomes without centromeric repeats. | the satellite sequences (agggag)(n) and ty3/gypsy-like retrotransposons are known to localize at the barley centromeres. using a gametocidal system, which induces chromosomal mutations in barley chromosomes added to common wheat, we obtained an isochromosome for the short arm of barley chromosome 7h (7hs) that lacked the barley-specific satellite sequence (agggag)(n). two telocentric derivatives of the isochromosome arose in the progeny: 7hs* with and 7hs** without the pericentromeric c-band. fi ... | 2005 | 15998740 |
| [effect of alien cytoplasm of goatgrass on biological and physiological properties of alloplasmic wheats]. | long-term studies of the cytoplasm-nucleus interactions in alloplasmic hybrids with the nucleus of triticum aestivum functioning in the alien cytoplasm of aegilops ovata are reviewed. the interaction of heterologous genome and cytoplasm affects the balanced mechanisms of developmental control of the parental forms. the changes are observed at all levels of both physiological and morphological processes. alloplasmic wheats produced by backcrossing represent a novel type of synthetic plant differe ... | 2016 | 16004259 |
| mechanistic information from analysis of molecular weight distributions of starch. | a methodology is developed for interpreting the molecular weight distributions of debranched amylopectin, based on techniques developed for quantitatively and qualitatively finding mechanistic information from the molecular weight distributions of synthetic polymers. if the only events occurring are random chain growth and stoppage (i.e., the rates are independent of degree of polymerization over the range in question), then the number of chains of degree of polymerization n, p(n), is linear in ... | 2005 | 16004469 |
| biochemical characterization of a cinnamoyl-coa reductase from wheat. | cinnamoyl-coa reductase (ccr) is responsible for the coa ester-->aldehyde conversion in monolignol biosynthesis, which can divert phenylpropanoid-derived metabolites into the biosynthesis of lignin. to gain a better understanding of lignin biosynthesis in wheat (triticum aestivum l.), a cdna encoding ccr was isolated and named ta-ccr2. dna hybridization analyses demonstrated that the ta-ccr2 gene exists in three copies in the wheat genome. rna blot hybridization indicated that ta-ccr2 was expres ... | 2005 | 16006242 |
| systematic spatial analysis of gene expression during wheat caryopsis development. | the cereal caryopsis is a complex tissue in which maternal and endosperm tissues follow distinct but coordinated developmental programs. because of the hexaploid genome in wheat (triticum aestivum), the identification of genes involved in key developmental processes by genetic approaches has been difficult. to bypass this limitation, we surveyed 888 genes that are expressed during caryopsis development using a novel high-throughput mrna in situ hybridization method. this survey revealed novel di ... | 2005 | 16006577 |
| diversification in substrate usage by glutathione synthetases from soya bean (glycine max), wheat (triticum aestivum) and maize (zea mays). | unlike animals which accumulate glutathione (gamma-glutamyl-l-cysteinyl-glycine) alone as their major thiol antioxidant, several crops synthesize alternative forms of glutathione by varying the carboxy residue. the molecular basis of this variation is not well understood, but the substrate specificity of the respective gss (glutathione synthetases) has been implicated. to investigate their substrate tolerance, five gs-like cdnas have been cloned from plants that can accumulate alternative forms ... | 2005 | 16008521 |
| [comparative analysis of genetic diversity revealed by genomic-ssr, est-ssr and pedigree in wheat (triticum asetivum l.)]. | two ssr molecular markers, genomic-ssr and est (expressed sequence tagged)-ssr, were used to measure the genetic diversity among 18 accessions of common wheat with known pedigrees, which were collected from winter wheat production region in northern china. in addtion, the genetic diversity revealed by pedigree, est-ssr and genomic-ssr was also compared. the results showed that the average number of alleles per genomic-ssr locus is 3.34, which is higher than that of est-ssr (2.31), indicating tha ... | 2005 | 16011033 |
| [allelopathic effects of cultured cucurbita moschata root exudates]. | by using the techniques of tissue culture, bio-assay and laboratory analysis, this paper studied the effects of the allelopathic chemicals from pumpkin (cucurbita moschata) roots on the seed germination and seedling growth of pumpkin, wheat (triticum aestivum), and radish (raphanus sativus). the pumpkin root was cultured on a sterile b5 media, and the concentrations of macro- and microelements, organic supplements and hormones in the media were adjusted by using an orthogonal design. after cultu ... | 2005 | 16011180 |
| [effects of cultured astragalus adsurgens root on other plants growth]. | by using orthogonal design, this paper investigated the growth of cultured prairie milk vetch (astragalus adsurgens) root on the b5 medium with different contents of sucrose, macro-and microelements and organic supplements, and adopting the method of filter paper-culture in petri-dish, studied the effects of a. adsurgens culture filtrate on the seedling growth of radish (raphanus sativus) and wheat (triticum aestivum). the results showed that the effect of a. adsurgens culture filtrate on r. sat ... | 2005 | 16011183 |
| inducing rye 1r chromosome structural changes in common wheat cv. chinese spring by the gametocidal chromosome 2c of aegilops cylindrica. | to generate 1 r deletion and translocation lines, we introduced a 2c chromosome,which was derived from aegilops cylindrica and was known to have a gametocidal function when added monosomically into common wheat cv. chinese spring (cs) and its derivative, into a wheat-rye 1r chromosome disomic addition line (cs-1r"). when the individuals with chromosome constitution 21" + 1r" + 2c' (2n = 45) were selfed, the 1r chromosome structural changes were found to be induced with high frequency (24.1%) amo ... | 2005 | 16018259 |
| identification of differentially expressed genes in leaf and root between wheat hybrid and its parental inbreds using pcr-based cdna subtraction. | heterosis was defined as the advantage of hybrid performance over its parents in terms of growth and productivity. previous studies showed that differential gene expression between hybrids and their parents is responsible for the heterosis; however, information on systematic identification and characterization of the differentially expressed genes are limited. in this study, an interspecific hybrid between common wheat (triticum aestivum. l., 2n = 6x = 42, aabbdd) line 3338 and spelt (triticum s ... | 2005 | 16021401 |
| spatial and temporal distribution of induced resistance to greenbug (homoptera: aphididae) herbivory in preconditioned resistant and susceptible near isogenic plants of wheat. | interactions between biotype e greenbugs, schizaphis graminum (rodani), and two near isogenic lines of the greenbug resistance gene gb3 of wheat, triticum aestivum l., were examined for 62 d after infestation. by comparing aphid performance and host responses on control and greenbug-preconditioned plants, we demonstrated that systemic resistance to greenbug herbivory was inducible in the resistant genotype with varying intensities and effectiveness in different parts of the plants. preconditioni ... | 2005 | 16022335 |
| development of a virus-induced gene-silencing system for hexaploid wheat and its use in functional analysis of the lr21-mediated leaf rust resistance pathway. | virus-induced gene silencing (vigs) is an important tool for the analysis of gene function in plants. in vigs, viruses engineered to carry sequences derived from plant gene transcripts activate the host's sequence-specific rna degradation system. this mechanism targets the rnas of the viral genome for degradation, and as the virus contains transcribed plant sequence, homologous host mrnas are also targeted for destruction. while routinely used in some dicots, no vigs system was known for monocot ... | 2005 | 16024691 |
| tavrt-2, a member of the stmads-11 clade of flowering repressors, is regulated by vernalization and photoperiod in wheat. | the initiation of the reproductive phase in winter cereals is delayed during winter until favorable growth conditions resume in the spring. this delay is modulated by low temperature through the process of vernalization. the molecular and genetic bases of the interaction between environmental factors and the floral transition in these species are still unknown. however, the recent identification of the wheat (triticum aestivum l.) tavrt-1 gene provides an opportunity to decipher the molecular ba ... | 0 | 16024692 |
| the wheat tagi1, involved in photoperiodic flowering, encodes an arabidopsis gi ortholog. | wheat (triticum aestivum l.) is an important crop and requires long day and short night to flower. to study the molecular mechanism of photoperiodic regulation of flowering in this species, we isolated a wheat tagi1 gene, an ortholog of gigantea (gi) in arabidopsis. rna blot hybridization revealed that tagi1 is expressed in leaves in a rhythmic manner under long day and short day conditions and its rhythmic expression is regulated by photoperiods and circadian clocks. further study demonstrated ... | 2005 | 16028116 |
| exploiting genotypic variation in plant nutrient accumulation to alleviate micronutrient deficiency in populations. | more than 2 billion people consume diets that are less diverse than 30 years ago, leading to deficiencies in micronutrients, especially iron (fe), zinc (zn), selenium (se), iodine (i), and also vitamin a. a strategy that exploits genetic variability to breed staple crops with enhanced ability to fortify themselves with micronutrients (genetic biofortification) offers a sustainable, cost-effective alternative to conventional supplementation and fortification programs. this is more likely to reach ... | 2005 | 16028493 |
| bioactivity of the fungal metabolite (8r,16r)-(-)-pyrenophorin on graminaceous plants. | a secondary metabolite was isolated from cultures of a drechslera avenae pathotype with host specificity to avena sterilis and identified as the macrodiolide (8r,16r)-(-)-pyrenophorin (8,16-dimethyl-1,9-dioxa-cyclohexadeca-3,11-diene-2,5,10,13-tetraone). a considerable yield of the substance was obtained after 8-12 days of incubation at temperatures of 15-20 degrees c. the compound at a concentration of 60 microm inhibited seed germination of wild oats (avena sterilis, a. fatua), oat (a. sativa) ... | 2005 | 16028978 |
| synthesis and screening of anilides having olefinic and alkyl moiety in the side chain as chemical hybridizing agents for wheat (triticum aestivum l.). | induction of male sterility by deployment of chemical hybridizing agents (chas) holds immense potential in heterosis breeding of wheat. a total of 21 anilides having different aromatic substitutions and side-chain variation were synthesized and screened as chas on three genotypes of wheat viz., pbw 343, hw 2046, and hd 2733, at winter season. various anilides having vinyl moiety in the acyl side chain were synthesized by condensation between substituted anilines with different esters or acid chl ... | 2005 | 16028981 |
| high transferability of bread wheat est-derived ssrs to other cereals. | the increasing availability of expressed sequence tags (ests) in wheat (triticum aestivum) and related cereals provides a valuable resource of non-anonymous dna molecular markers. in this study, 300 primer pairs were designed from 265 wheat ests that contain microsatellites in order to develop new markers for wheat. their level of transferability in eight related species [triticum durum, t. monococcum, aegilops speltoides, ae. tauschii, rye (secale cereale), barley (hordeum vulgare), agropyron e ... | 0 | 16034582 |
| fructan:fructan 1-fructosyltransferase, a key enzyme for biosynthesis of graminan oligomers in hardened wheat. | fructans play important roles not only as a carbon source for survival under persistent snow cover but also as agents that protect against various stresses in overwintering plants. complex fructans having both beta-(2,1)- and beta-(2,6)-linked fructosyl units accumulate in wheat (triticum aestivum l.) during cold hardening. we detected fructan: fructan 1-fructosyltransferase (1-fft; ec 2.4.1.100) activity for catalyzing the formation and extension of beta-(2,1)-linked fructans in hardened wheat ... | 2005 | 16034592 |
| zinc and copper uptake by plants under two transpiration rates. part i. wheat (triticum aestivum l.). | to evaluate the environmental risk of irrigating crops with treated wastewater, an experiment was conducted using two growth chambers, each offering a different vapour pressure deficit (vpd) for high and low transpiration rates (tr), respectively. one of the two sets of 24 pots planted with 6 week old wheat (triticum aestivum l.), was placed in each growth chamber, and irrigated in triplicates for 20 days with 8 zn and cu solutions (0 and 25 mg zn/l combined with 0, 5, 15 and 30 mg cu/l). water ... | 2005 | 16043273 |
| cloning of resistance gene analogs located on the alien chromosome in an addition line of wheat-thinopyrum intermedium. | homology-based gene/gene-analog cloning method has been extensively applied in isolation of rgas (resistance gene analogs) in various plant species. however, serious interference of sequences on homoeologous chromosomes in polyploidy species usually occurred when cloning rgas in a specific chromosome. in this research, the techniques of chromosome microdissection combined with homology-based cloning were used to clone rgas from a specific chromosome of wheat-thinopyrum alien addition line tai-27 ... | 2005 | 16044269 |
| molecular cloning and functional analysis of a novel 6&1-feh from wheat (triticum aestivum l.) preferentially degrading small graminans like bifurcose. | like barley and other cereals, wheat (triticum aestivum l.) accumulates branched graminan-type fructans containing both beta-(2,1) and beta-(2,6) fructosyl linkages, mainly with a quite low degree of polymerization (dp). 1&6-kestotetraose (bifurcose) is the major fructan oligosaccharide accumulating in crown tissues and leaves of cereals exposed to chilling. the fructan exohydrolase (feh) cdnas 1-feh w1 and w2 were previously cloned from wheat crowns sampled in mid-november. here, we report the ... | 0 | 16051449 |
| uniparental chromosome elimination at mitosis and interphase in wheat and pearl millet crosses involves micronucleus formation, progressive heterochromatinization, and dna fragmentation. | complete uniparental chromosome elimination occurs in several interspecific hybrids of plants. we studied the mechanisms underlying selective elimination of the paternal chromosomes during the development of wheat (triticum aestivum) x pearl millet (pennisetum glaucum) hybrid embryos. all pearl millet chromosomes were eliminated in a random sequence between 6 and 23 d after pollination. parental genomes were spatially separated within the hybrid nucleus, and pearl millet chromatin destined for e ... | 2005 | 16055632 |
| regulation of vrn-1 vernalization genes in normal and transgenic polyploid wheat. | vernalization, the requirement of a long exposure to low temperatures to accelerate flowering, is an essential adaptation of plants to cold winters. the vernalization gene vrn-1 plays an important role in this process in diploid (triticum monococcum) and polyploid wheat (triticum aestivum). we have recently shown that the diploid wheat vrn-a(m)1 gene was similar to the arabidopsis (arabidopsis thaliana l. heynh.) apetala1 meristem identity gene. we also showed that dominant vrn-a(m)1 alleles wer ... | 2005 | 16055679 |
| homoeologous meiotic chromosome pairing in triticum aestivum in which chromosome 5b is replaced by an alien homoeologue. | 1970 | 16057260 | |
| wheat non-specific lipid transfer protein genes display a complex pattern of expression in developing seeds. | nine cdna clones encoding non-specific lipid transfer proteins (nsltps) were isolated from triticum aestivum and triticum durum cdna libraries and characterized. one cdna is predicted to encode a type 2 nsltp (7 kda) while others encode type 1 nsltps (9 kda). all encoded proteins contain an n-terminal signal sequence and possess the characteristic features of nsltps. the genomic structures of the wheat nsltp genes show that type 2 taltp7.1a, taltp7.2a and type 1 taltp9.2b genes lack introns whil ... | 2005 | 16061294 |
| mapping a resistance gene in wheat cultivar yangfu 9311 to yellow mosaic virus, using microsatellite markers. | wheat yellow mosaic disease, which is caused by wheat yellow mosaic bymovirus (wymv) and transmitted by soil-borne fungus, results in severe damage on wheat (triticum aestivum l.) production in china. for development of resistant cultivars to reduce wheat yield losses due to wheat yellow mosaic disease, resistance test and genetic analysis indicated that a single dominant gene in wheat cultivar yangfu 9311 contributed to the resistance. bulk segregant analysis was used to identify microsatellite ... | 2005 | 16075203 |
| development of taxon-specific sequences of common wheat for the detection of genetically modified wheat. | qualitative and quantitative polymerase chain reaction (pcr) systems aimed at the specific detection and quantification of common wheat dna are described. many countries have issued regulations to label foods that include genetically modified organisms (gmos). pcr technology is widely recognized as a reliable and useful technique for the qualitative and quantitative detection of gmos. detection methods are needed to amplify a target gm gene, and the amplified results should be compared with thos ... | 2005 | 16076109 |
| [genetic analysis and molecular markers of a novel stripe rust resistance gene yrhua in wheat originated from psathyrostachys huashanica keng]. | the h9020-17-5,a common wheat-psathyrostachys huashanica keng translocation line, possesses excellent resistance to wheat stripe rust. genetic analysis of f2 and bc1 populations derived from h9020-17-5 x mingxian169 indicated that resistance to stripe rust in h9020-17-5 was a dominant character controlling by single gene originated from ps. huashanica. this resistance gene originated from ps. huashanica was first reported in the present study and named as yrhua. in order to map the resistance ge ... | 2005 | 16078743 |
| association mapping of kernel size and milling quality in wheat (triticum aestivum l.) cultivars. | association mapping is a method for detection of gene effects based on linkage disequilibrium (ld) that complements qtl analysis in the development of tools for molecular plant breeding. in this study, association mapping was performed on a selected sample of 95 cultivars of soft winter wheat. population structure was estimated on the basis of 36 unlinked simple-sequence repeat (ssr) markers. the extent of ld was estimated on chromosomes 2d and part of 5a, relative to the ld observed among unlin ... | 2005 | 16079235 |
| [features of crossability, haploidy and polyembryony in hybrid combinations between common barley hordeum vulgare l. (2n = 14) and wheat-rye substitution lines triticum aestivum l., cultivar saratovskaya 29/secale cereale l., cultivar onokhoiskaya]. | the role of individual chromosomes of rye in the manifestation of crossability and seedling development in hybrid combinations between common barley hordeum vulgare l., cultivar nepolegayushchii (2n = 14) and five wheat-rye substitution lines triticum aestivum l., cultivar saratovskaya 29/secale cereale l., cultivar onokhoiskaya (2n = 40 wheat + 2 rye chromosomes). crossability, which was measured by two parameters--frequency of set grains and frequency of grains with embryos--was shown to be si ... | 2005 | 16080603 |
| [analysis of inheritance of morphological and biochemical characters introgressed into common wheat from aegilops speltoides tausch]. | genetic control of some morphological traits and the gliadin composition were examined in plants of two lines of common wheat carrying genes introgressed from the wild diploid cereal aegilops speltoides. leaf hairiness was shown to be controlled by a single introgressed dominant gene that was not allelic to the known common wheat gene hl1. waxlessness of the whole plant is controlled by the introgressed from ae. speltoides inhibitor gene allelic to gene w1 located on chromosome 2b. this gene was ... | 2005 | 16080604 |
| arsenate (as) uptake by and distribution in two cultivars of winter wheat (triticum aestivum l.). | two cultivars of winter wheat (triticum aestivum l.) (jing 411 and lovrin 10) were used to investigate arsenate (as) uptake and distribution in plants grown in hydroponic culture and in the soil. results showed that without as addition, lovrin 10 had higher biomass than jing 411 in the soil pot experiment; in the hydroponic experiment lovrin 10 had similar root biomass to and lower shoot biomass than jing 411. increasing p supply from 32 to 161 microm resulted in lower tissue as concentrations, ... | 2006 | 16081139 |
| effects of a soil conditioner on some physical and biological features of soils: results from a greenhouse study. | a soil amendment substance-organic bio-stimulator, terralyt plus (tp), was used to observe its impact on the properties of clay loam (cl), sandy clay loam (scl) and sandy loam (sl) soils and the growth of corn (zea mays indentata l.) and wheat (triticum aestivum ssp./vulgare vill. v. lutescens) under greenhouse conditions. the diluted tp solutions (1:500, 1:1000 and 1:2000) were sprayed onto the soil surfaces. the wheat growth increased for cl and scl with the application of tp at 1:1000. the hi ... | 2005 | 16084376 |
| molecular identification of wheat endoxylanase inhibitor taxi-ii and the determinants of its inhibition specificity. | wheat grains contain triticum aestivum xylanase inhibitor (taxi) proteins which inhibit microbial xylanases, some of which are used in cereal based food industries. these inhibitors may play a role in plant defence. among the taxi isoforms described so far, taxi-ii displays a deviating inhibition specificity pattern. here, we report on the molecular identity of taxi-ii and the basis of its inhibition specificity. three candidate taxi-ii encoding sequences were isolated and recombinantly expresse ... | 2005 | 16084833 |
| phyto-availability and speciation change of heavy metals in soils amended with lignin as micro-fertilizer. | lignin is a primary byproduct from the black liquor treatment in paper making industries, its application as micro-fertilizer in agricultural land might provide a promising alternative to sewage discharge. however, application of such a micro-fertilizer might affect the soil properties and result in soil pollution. in this study, the effects of lignin application on phyto-availability and speciation change of heavy metals in soils were investigated. greenhouse experiments showed that lignin appl ... | 2005 | 16089340 |
| soil properties affecting wheat yields following drilling-fluid application. | oil and gas drilling operations use drilling fluids (mud) to lubricate the drill bit and stem, transport formation cuttings to the surface, and seal off porous geologic formations. following completion of the well, waste drilling fluid is often applied to cropland. we studied potential changes in soil compaction as indicated by cone penetration resistance, ph, electrical conductivity (ec(e)), sodium adsorption ratio (sar), extractable soil and total straw and grain trace metal and nutrient conce ... | 2017 | 16091622 |
| microsatellite markers linked to 2 powdery mildew resistance genes introgressed from triticum carthlicum accession ps5 into common wheat. | two dominant powdery mildew resistance genes introduced from triticum carthlicum accession ps5 to common wheat were identified and tagged using microsatellite markers. the gene designated pmps5a was placed on wheat chromosome 2al and linked to the microsatellite marker xgwm356 at a genetic distance of 10.2 cm. based on the information of its origin, chromosome location, and reactions to 5 powdery mildew isolates, this gene could be a member of the complex pm4 locus. the 2nd gene designated pmps5 ... | 2005 | 16094424 |
| origin, structure, and behavior of a highly rearranged deletion chromosome 1bs-4 in wheat. | wheat (triticum aestivum l.) deletion (del) stocks are valuable tools for the physical mapping of molecular markers and genes to chromosome bins delineated by 2 adjacent deletion breakpoints. the wheat deletion stocks were produced by using gametocidal genes derived from related aegilops species. here, we report on the origin, structure, and behavior of a highly rearranged chromosome 1bs-4. the cytogenetic and molecular marker analyses suggest that 1bs-4 resulted from 2 breakpoints in the 1bs ar ... | 2005 | 16094425 |
| physiological and genetic analyses of aluminium tolerance in rice, focusing on root growth during germination. | aluminium (al) ion limits root growth of plants in acidic soils, and rice exhibits the highest level of al-tolerance among graminous crops. to elucidate al-tolerance mechanisms in rice, response to al was compared between rice (oryza sativa l., cv. nipponbare) and wheat (triticum aestivum l., cv. et8), focusing on seminal root growth at seedling stage and germination stage. at seedling stage, rice and wheat were similarly sensitive to al in both dose- and time-dependent manner during a 24-h al e ... | 2005 | 16095709 |
| growth, productivity, and competitiveness of introgressed weedy brassica rapa hybrids selected for the presence of bt cry1ac and gfp transgenes. | concerns exist that transgenic crop x weed hybrid populations will be more vigorous and competitive with crops compared with the parental weed species. hydroponic, glasshouse, and field experiments were performed to evaluate the effects of introgression of bacillus thuringiensis (bt) cry1ac and green fluorescent protein (gfp) transgenes on hybrid productivity and competitiveness in four experimental brassica rapa x transgenic brassica napus hybrid generations (f1, bc1f1, bc2f1 and bc2f2). the av ... | 2005 | 16101783 |
| changes of anti-oxidative enzymes and mda content under soil water deficits among 10 wheat (triticum aestivum l.) genotypes at maturation stage. | drought is a world-spread problem seriously influencing grain production and quality, the loss of which is the total for other natural disasters, with increasing global climate change making the situation more serious. wheat is the staple food for more than 35% of world population, so wheat anti-drought physiology study is of importance to wheat production and biological breeding for the sake of coping with abiotic and biotic conditions. much research is involved in this hot topic, but the pace ... | 2005 | 16102947 |
| genetics of durable resistance to leaf rust and stripe rust of an indian wheat cultivar hd2009. | the indian bread wheat cultivar hd2009 has maintained its partial resistance to leaf rust and stripe rust in india since its release in 1976. to examine the nature, number and mode of inheritance of its genes for partial leaf rust and stripe rust resistance, this cultivar was crossed with cultivar wl711, which is susceptible to leaf rust and stripe rust. the f1, f2, f3 and f5 generations from this cross were assessed separately for adult plant disease severity under artificial epidemic of race 7 ... | 2005 | 16110181 |
| genetic variability in triticale x bread wheat derivatives under normal and phosphorus stress regimes. | twenty six hexaploid triticale (x triticosecale wittmack) x bread wheat (triticum aestivum l. em thell) derivatives, along with 2 bread wheat and 2 triticale checks, were grown in normal and p-stress environments. spikes/plant and grain yield/plant, followed by peduncle length, were the most sensitive to phosphorus deficiency, which also caused a delay in heading and maturity. the heritability and genetic advance for grain yield/plant were high in the stress environment, reflecting the effective ... | 2005 | 16114468 |
| [chromosome analysis of chongqing thermo-photo sensitive male sterile wheat]. | seed gliadin acid-polyacrylamide-gel-electrophoresis (apage) and chromosome c-banding techniques were used to identify chromosome constitution of chongqing thermo-photo sensitive male sterile wheat. results showed that 1bs of the male sterile lines was substituted by 1rs of rye. they were 1b/1r wheat with triticum aestivum cytoplasm. | 2002 | 16118133 |
| expression analysis and physical mapping of low-molecular-weight glutenin loci in hexaploid wheat (triticum aestivum l.). | gliadins and glutenins are storage proteins important in determining the bread-, noodle-, and pasta-making quality of wheat. glutenins consist of hmw and lmw subunits. the glu-a3, glu-b3, and glu-d3 loci on the short arms of chromosomes 1a, 1b, and 1d, respectively, are the major loci for lmw glutenins. to construct physical maps of the glu-3 loci, a set of 24 high-density filters representing a 3.1x genome coverage hexaploid wheat bac library was screened by hybridization using a probe made of ... | 2005 | 16121237 |
| structure of aegilops ventricosa chromosome 6nv, the donor of wheat genes yr17, lr37, sr38, and cre5. | an aegilops ventricosa tausch (2n = 28, dvdvnvnv) subtelocentric chromosome added to wheat (triticum aestivum l.) in a disomic addition line was found to carry the genes for resistance yr17, lr37, sr38, and cre5 already transferred onto chromosome 2as of the wheat line vpm1. previous works demonstrated that this ae. ventricosa chromosome is translocated with respect to the standard wheat genome. the present investigations showed that this chromosome pre-existed in ae. ventricosa and contains onl ... | 2005 | 16121250 |
| effect of water stress and heavy metals on induction of somatic embryogenesis in wheat leaf base cultures. | in vitro cultures of plant tissues are known to mimic the response of field-grown plants when subjected to stress treatments. this investigation on triticum aestivum explores the effect of drought stress on somatic embryogenesis and endogenous proline content. leaf bases were cultured on ms medium supplemented with 2,4-d (10 microm) and different concentrations of peg (2.5, 5, 7.5%) or mannitol (0.25 and 0.5 m) and also subjected to different periods of aerial drying in the laminar flow for one- ... | 2005 | 16121718 |
| real-time polymerase chain reaction based assays for quantitative detection of barley, rice, sunflower, and wheat. | quality assurance is a major issue in the food industry. the authenticity of food ingredients and their traceability are required by consumers and authorities. plant species such as barley (hordeum vulgare), rice (oryza sativa), sunflower (helianthus annuus), and wheat (triticum aestivum) are very common among the ingredients of many processed food products; therefore the development of specific assays for their specific detection and quantification are needed. furthermore, the production and tr ... | 2005 | 16131102 |
| accumulation and fractionation of rare earth elements (rees) in wheat: controlled by phosphate precipitation, cell wall absorption and solution complexation. | previous studies on rare earth element (ree) bioaccumulation have focused on their accumulation rate and fractionation, but the processes involved remain unclear. in this study, the accumulation and fractionation of rees in wheat (triticum aestivum l.) were investigated using solution culture with exogenous mixed rees. a decrease in ree contents was observed from the roots to the tops of wheat. significant fractionations of rees were found in wheat organs as compared to the exogenous mixed rees. ... | 2005 | 16131504 |
| structural analysis of wheat wax (triticum aestivum, c.v. 'naturastar' l.): from the molecular level to three dimensional crystals. | in order to elucidate the self assembly process of plant epicuticular waxes, and the molecular arrangement within the crystals, re-crystallisation of wax platelets was studied on biological and non-biological surfaces. wax platelets were extracted from the leaf blades of wheat (triticum aestivum l., c.v. 'naturastar', poaceae). waxes were analysed by gas chromatography (gc) and mass spectrometry (ms). octacosan-1-ol was found to be the most abundant chemical component of the wax mixture (66 m%) ... | 2006 | 16133211 |
| cereal phosphate transporters associated with the mycorrhizal pathway of phosphate uptake into roots. | a very large number of plant species are capable of forming symbiotic associations with arbuscular mycorrhizal (am) fungi. the roots of these plants are potentially capable of absorbing p from the soil solution both directly through root epidermis and root hairs, and via the am fungal pathway that delivers p to the root cortex. a large number of phosphate (p) transporters have been identified in plants; tissue expression patterns and kinetic information supports the roles of some of these in the ... | 2005 | 16133217 |
| a qtl located on chromosome 4a associated with dormancy in white- and red-grained wheats of diverse origin. | improved resistance to preharvest sprouting in modern bread wheat (triticum aestivum. l.) can be achieved via the introgression of grain dormancy and would reduce both the incidence and severity of damage due to unfavourable weather at harvest. the dormancy phenotype is strongly influenced by environmental factors making selection difficult and time consuming and this trait an obvious candidate for marker assisted selection. a highly significant quantitative trait locus (qtl) associated with gra ... | 2005 | 16133305 |
| introgression of wheat dna markers from a, b and d genomes in early generation progeny of aegilops cylindrica host x triticum aestivum l. hybrids. | introgression from allohexaploid wheat (triticum aestivum l., aabbdd) to allotetraploid jointed goatgrass (aegilops cylindrica host, ccdd) can take place in areas where the two species grow in sympatry and hybridize. wheat and ae. cylindrica share the d genome, issued from the common diploid ancestor aegilops tauschii coss. it has been proposed that the a and b genome of bread wheat are secure places to insert transgenes to avoid their introgression into ae. cylindrica because during meiosis in ... | 2005 | 16133306 |
| novel puroindoline and grain softness protein alleles in aegilops species with the c, d, s, m and u genomes. | dna from six hexaploid, tetraploid and diploid species of aegilops with the c, d, s, m and u genomes was amplified with specific pcr primers to identify sequences encoding puroindolines (pins) a and b and grain softness protein (gsp), all of which are encoded by genes at the ha (hardness) locus, with ae. tauschii (dd) and bread wheat (t. aestivum) (aabbdd) cv hiline being studied as controls. seven new allelic forms of pin a and pin b were identified, including forms with mutations within or clo ... | 2005 | 16133313 |
| mapping of a major qtl for pre-harvest sprouting tolerance on chromosome 3a in bread wheat. | quantitative trait loci (qtl) analysis was conducted for pre-harvest sprouting tolerance (phst) in bread wheat for a solitary chromosome 3a, which was shown to be important for this trait in earlier studies. an inter-varietal mapping population in the form of recombinant inbred lines (rils) developed from a cross between spr8198 (a phs tolerant genotype) and hd2329 (a phs susceptible cultivar) was used for this purpose. the parents and the ril population were grown in six different environments ... | 2005 | 16133317 |
| arabinogalactans and arabinogalactan-proteins induce embryogenesis in wheat (triticum aestivum l.) microspore culture. | the objective of this study was to improve induction of embryogenesis in wheat microspore culture in order to obtain a high number of regenerable embryos. the arabinogalactan (ag) larcoll and the arabinogalactan-protein (agp) from gum arabic were tested on two spring genotypes to see if they could increase microspore viability and induce embryogenesis in the microspore culture. adding larcoll significantly decreased microspore mortality in both genotypes regardless of the presence or absence of ... | 2006 | 16133349 |
| [advances in studies of genome-specific repetitive dna sequences in wheat and related species]. | in this paper we review recent advances in studies of several aspects of genome specific repetitive dna sequences in wheat and related species. the available results demonstrate that genome specific repetitive dna sequences are important components of genome specificity in wheat and related species. research on genome specific repetitive dna sequences is essential to the elucidation of genome function. the application of genome specific repetitive dna sequences will aid molecular cytogenetic stu ... | 2002 | 16135457 |
| genetic characterization and molecular mapping of a hessian fly-resistance gene transferred from t. turgidum ssp. dicoccum to common wheat. | a gene (temporarily designated hdic) conferring resistance to the hessian fly (hf) [mayetiola destructor (say)] was previously identified from an accession of german cultivated emmer wheat [triticum turgidum ssp. dicoccum (schrank ex schübler) thell] pi 94641, and was transferred to the hf-resistant wheat germplasm ks99wgrc42. the inheritance of hdic resistance exhibited incomplete penetrance because phenotypes of some heterozygous progenies are fully resistant and the others are fully susceptib ... | 2005 | 16136351 |
| application of a new ibd-based qtl mapping method to common wheat breeding population: analysis of kernel hardness and dough strength. | mapping quantitative trait loci (qtl) in plants is usually conducted using a population derived from a cross between two inbred lines. the power of such qtl detection and the estimation of the effects highly depend on the choice of the two parental lines. thus, the qtl found represent only a small part of the genetic architecture and can be of limited economical interest in marker-assisted selection. on the other hand, applied breeding programmes evaluate large numbers of progeny derived from mu ... | 2005 | 16142465 |
| wheat cultivar-specific proteins in grain revealed by 2-de and their application to cultivar identification of flour. | wheat flour proteins were studied to identify the cultivar-specific proteins and use them to identify cultivars in flours. proteins extracted from flours of japanese wheat (cultivars hokushin, horoshirikomugi, kitanokaori and kachikei 33) and canadian wheat (canada western red spring wheat no. 1; 1cw) were analyzed by 2-de with ief gels over three ph ranges: ph 4-7, ph 5-8, and ph 6-11. this system enabled detection of more than 1600 protein spots. we recognized that among 50 protein spots showi ... | 2005 | 16152659 |
| assessment of comparative toxicities of lead and copper using plant assay. | the acute toxicities of lead (pb) and copper (cu) to important crop plants sorghum bicolor, cucumis sativus, triticum aestivum, and zea mays were compared. the ec50 values (the concentration of metals in the soil that reduces the growth of shoots and roots by 50%) were derived using the trimmed spearman-karber method. the ec50s-shoot (root) in mg pb kg-1 dry soil and mg cu kg-1 dry soil were in the range of 519 to >1280 (285-445), and 48-232 (<40-110), respectively. those concentrations are like ... | 2006 | 16153686 |
| comparative sequence analysis of the phytochrome c gene and its upstream region in allohexaploid wheat reveals new data on the evolution of its three constituent genomes. | bread wheat is an allohexaploid with genome composition aabbdd. phytochrome c is a gene involved in photomorphogenesis that has been used extensively for phylogenetic analyses. in wheat, the phyc genes are single copy in each of the three homoeologous genomes and map to orthologous positions on the long arms of the group 5 chromosomes. comparative sequence analysis of the three homoeologous copies of the wheat phyc gene and of some 5 kb of upstream region has demonstrated a high level of conserv ... | 2005 | 16158239 |
| evidence for the involvement of arabinoxylan and xylanases in refrigerated dough syruping. | the relationship between syruping in refrigerated doughs upon prolonged storage and different aspects of arabinoxylan (ax) hydrolysis was investigated using triticum aestivum xylanase inhibitor (taxi) and different xylanases in the dough formula. dough characteristics were evaluated with strong emphasis on the ax population and its fate as a function of storage time. selective reduction of part of the flour endogenous xylanase activity in dough by added taxi reduced dough syruping after 12 and 2 ... | 2005 | 16159195 |
| three-dimensional modelling of wheat endosperm development. | we have developed methods, based on confocal microscopy and three-dimensional (3d) modelling, for the analysis of complex tissues and individual nuclei. these methods were used to study the development of early wheat (triticum aestivum) endosperm as a whole and of endosperm nuclei undergoing polyploidization. fixed sections of immature caryopses were either stained with sytox green or used for fluorescence in situ hybridization (fish) to visualize centromeres, telomeres and a rye chromosome arm ... | 2005 | 16159338 |
| microgravity effects on thylakoid, single leaf, and whole canopy photosynthesis of dwarf wheat. | the concept of using higher plants to maintain a sustainable life support system for humans during long-duration space missions is dependent upon photosynthesis. the effects of extended exposure to microgravity on the development and functioning of photosynthesis at the leaf and stand levels were examined onboard the international space station (iss). the pesto (photosynthesis experiment systems testing and operations) experiment was the first long-term replicated test to obtain direct measureme ... | 2005 | 16160842 |
| [grain protein content in wheat: genetics of the character and some predictions for its improvement in common wheat]. | the results of studies on genetic control of the grain protein content character in common wheat and the attempts of its improvement using traditional breeding approaches and methods of experimental mutagenesis and introgressive hybridization are presented. the evolution of the views on the genetic structure of the character is considered. possible explanations are given to the fact that the attempts to significantly improve the character in question in common wheat cultivars have failed in spit ... | 2005 | 16161620 |
| [genetic control of embryo lethality in crosses between common wheat and rye]. | the phenotypic manifestation and genetic control of embryo lethality observed in crosses between common wheat and rye were studied. it was found that crosses between common wheat and inbred self-fertile rye lines l2 and 535 gave rise to ungerminating grains, in which the development and differentiation of the hybrid embryo are arrested. study of the degree of embryo development in the hybrid grains obtained by crossing common wheat varieties with inbred rye lines l2 and 535 showed that genotypes ... | 2005 | 16161628 |
| [identification of an alien chromosome in the common wheat line multi 6r]. | the chromosome of agropyron intermedium (host) beauv. substituting chromosome 6d has been identified in the karyotype of the triticum aestivum l. line multi 6r with the use of c-banding. the alien chromosome, temporarily designated 6ag1, contains gene(s) of the resistance to the saratov population of puccinia recondita rob. ex. desm. f. tritici. it has been demonstrated that the resistance gene(s) is(are) highly efficient and that chromosome 6ag1 is preferably transferred through gametes. | 2005 | 16161629 |
| allopolyploidy in wheat induces rapid and heritable alterations in dna methylation patterns of cellular genes and mobile elements. | whereas accumulating recent evidences indicate that allopolyploid formation in plants is accompanied by rapid and non-mendelian genomic changes, some other works showed genomic stasis in both nascent and natural allopolyploids. to further study the issue, we performed global dna fingerprinting of a newly synthesized allohexaploid wheat and its natural counterpart, the common wheat, by aflp analysis. it was found that ca. 20% bands showed deviation from parental additivity in both synthetic and t ... | 2005 | 16161630 |
| [hybrid and monosomic analyses of smoky coloration of the ear in common wheat]. | the results of the hybrid and monosomic analyses of smoky ear coloration in the common wheat variety columbina are reported. the character has been found to be monogenic, and its gene has been located to chromosome ids. the smoky ear coloration is determined by an allele of gene rg2 introgressed to wheat from aegilops tauschii. | 2005 | 16161638 |
| investigation of the response of bread wheat cultivars to salinity by using callus cultures. | in this research, the response of four bread wheat cultivars (bal-atilla, marmara-86, seyhan-95, and panda) to different nacl concentrations (25.6, 51.3, 77.0, 99.4,119.7 mm) were investigated by using callus cultures. in the experiment, callus induction rates (%) and callus weights in solid and liquid ms media, callus weights in liquid ms media with different nacl concentrations and in liquid ms media free nacl concentrations, and callus weights and regeneration rates in ms solid media with nac ... | 2005 | 16161981 |