Publications
| Title | Abstract | Year Filter | PMID(sorted ascending) Filter |
|---|
| stimulation of shoot regeneration in triticum aestivum and nicotiana plumbaginifolia viv. tissue cultures using the ethylene inhibitor agno3. | silver nitrate effectively promoted shoot regeneration in wheat (triticum aestivum l.) callus cultures derived from immature embryos. this effect could be observed in both weakly and strongly regenerating cultivars, and in using material from both field and greenhouse grown plants. the role of silver ions as an inhibitor of ethylene action was supported by a reversal of the inhibitory effects of 2,4-d and ethylene on morphogenesis in wheat callus cultures.enhancement of shoot regeneration by sil ... | 1987 | 24248436 |
| suspension and protoplast culture of hexaploid wheat (triticum aestivum l.). | suspension cultures have been initiated from embryogenic callus of hexaploid wheat (triticum aestivum l.). most commonly, these "suspensions" are composed of callus-like clusters (up to 2 mm in diameter). two rapidly-growing lines (mbe6 and c82d) have been obtained, which consist of smaller aggregates of cytoplasmic cells, and these have been maintained for more than 4 years. these lines show very limited morphogenetic capacity and only a single plantlet has been regenerated, from line mbe6, aft ... | 1987 | 24248442 |
| induction of pistil-like structures in suspension-derived callus cultures of wheat (triticum aestivum). | in the following a method for the induction of pistil-like structures in wheat suspension cultures (triticum aestivum l.) is described. in young influorescences of plants, which were artificially infected with the wheat bunt fungi (tilletia controversa), organogenic calli with pistil-like structures could be induced on loblolly pine medium + 3 mg/l 3,6-dichloro-2-methoxy benzoic acid. the yield of these structures in calli from a five-month-old suspension culture was up to 100 per gram of callus ... | 1987 | 24248846 |
| wheat tissues freeze-etched during exposure to extracellular freezing: distribution of ice. | pieces excised from leaf bases and laminae of seedlings of triticum aestivum l. cv. lennox were slowly frozen, using a specially designed apparatus, to temperatures between 2° and 14° c. these treatments ranged from non-damaging to damaging, based on ion-leakage tests to be found in the accompanying report (pearce and willison 1985, planta 163, 304-316). the frozen tissue pieces were then freeze-fixed by rapidly cooling them, via melting freon, to liquid-nitrogen temperature. the tissue was subs ... | 1985 | 24249402 |
| a freeze-etch study of the effects of extracellular freezing on cellular membranes of wheat. | seedlings of triticum aestivum l. cv. lennox were grown in different environments to obtain different hardiness. pieces of laminae and leaf bases were slowly cooled to sub-zero temperatures and the damage caused was assessed by an ion-leakage method. comparable pieces of tissue were slowly cooled to temperatures between 2° and-14°c and were then freeze-fixed and freeze-etched. membranes generally retained their lamellar structures indicated by the abundance of typical membrane fracture faces in ... | 1985 | 24249403 |
| changes in the activities of chloroplast and cytosolic isoenzymes of glutamine synthetase during normal leaf growth and plastid development in wheat. | soluble protein extracts and chloroplasts from a serial sequence of transverse sections of a 7-d-old wheat leaf (triticum aestivum cv. maris huntsman) were used to study changes in the activity of glutamine synthetase (gs; ec 6.3.1.2) during cell and chloroplast development. glutamine synthetase activity increased more than 50-fold per cell from the base to the tip of the wheat leaf. two isoenzymes of gs were separated using fast protein liquid chromatography (fplc). glutamine synthetase localiz ... | 1985 | 24249453 |
| combining microtomy and confocal laser scanning microscopy for structural analyses of plant-fungus associations. | the serious problem of extended tissue thickness in the analysis of plant-fungus associations was overcome using a new method that combines physical and optical sectioning of the resin-embedded sample by microtomy and confocal microscopy. improved tissue infiltration of the fungal-specific, high molecular weight fluorescent probe wheat germ agglutinin conjugated to alexa fluor® 633 resulted in high fungus-specific fluorescence even in deeper tissue sections. if autofluorescence was insufficient, ... | 2014 | 24249491 |
| specificity of an antibody to a subunit of high-molecular-weight storage protein from wheat seed and its reaction with other cereal storage proteins (prolamins). | an antiserum to subunit 2 from the high-molecular-weight (hmw) subunits of the glutenin fraction of triticum aestivum cv. highbury was shown to react with related subunits from other cultivars of wheat. the reaction was measured quantitatively by laser nephelometry in polyethylene glycol phosphate-buffered saline after dissolving the hmw fraction in 0.1 m acetic acid; urea used to dissolve the hmw prolamins inhibited the reaction, in some cases at the low concentration of 0.06 m. a study of the ... | 1985 | 24249513 |
| electrostatic surface properties of plasmalemma vesicles from oat and wheat roots. ion binding and screening investigated by 9-aminoacridine fluorescence. | right-side-out and sealed plasmalemma vesicles were isolated from roots of spring wheat (triticum aestivum l. cv. drabant) and oat (avena sativa l. cv. brighton) by two-phase partition in a medium containing sucrose (0.25 mol l(-1)). oat root plasmalemma vesicles were discovered to contain a strongly fluorescent compound with an emission maximum at 418 nm. the surface potential of the membranes was monitored by 9-aminoacridine fluorescence and the effect of protein concentration, mannitol versus ... | 1985 | 24249604 |
| the nadph-protochlorophyllide oxidoreductase is the major protein constituent of prolamellar bodies in wheat (triticum aestivum l.). | a fraction of highly purified prolamellar bodies was isolated from etioplasts of wheat (triticum aestivum l. cv. starke ii, weibull), as previously described by ryberg and sundqvist (1982, physiol. plant., 56, 125-132). studies on the protein composition revealed that only one major polypeptide of an apparent molecular weight of 36000 is present in the fraction of prolamellar bodies. this polypeptide was identified as the nadph-protochlorophyllide oxidoreductase. the highest specific activity of ... | 1985 | 24249610 |
| identification of new aquaporin genes and single nucleotide polymorphism in bread wheat. | major facilitators of water movement through plant cell membranes include aquaporin proteins. wheat is among the largest and most important cereal crops worldwide; however, unlike other model plants such as rice, maize and arabidopsis, little has been reported on wheat major intrinsic proteins (mips). this study presents a comprehensive computational identification of 349 new wheat expressed sequence tags (ests), encoding 13 wheat aquaporin genes. identified aquaporins consist of 6 plasma membra ... | 2013 | 24250219 |
| factors affecting the induction of pollen plants of intergeneric hybrids of triticum aestivum x triticum-agropyron. | experimental results showed that the use of potato extract as a basic component of culture medium had a promoting effect on producing calli in anther culture of the intergeneric hybrids of triticum aestivum × triticum-agropyron (intermediate type). the induction frequencies of pollen callus on the potato-ii medium containing potato extract as the main component was much higher than that found on n6 and w5 media. the induction frequencies of pollen callus and green plantlets in four intergeneric ... | 1985 | 24252924 |
| intrachromosomal mapping of crossability genes in wheat (triticum aestivum). | intrachromosomal mapping studies were used to locate the positions of the genes kr1 and kr2, which control the crossability of wheat with hordeum bulbosum, on chromosomes 5b and 5a, respectively. the location of kr1 was established using the telocentric mapping technique and found to be on the long arm of chromosome 5b, distal to the centromere with a mean recombination frequency of 44.8±3.28%. kr2 was located on the long arm of chromosome 5a by linkage with the major gene markers vrn1, controll ... | 1985 | 24252927 |
| meiotic pairing in hybrids between tetraploid triticale and related species: new elements concerning the chromosome constitution of tetraploid triticale. | two f5 strains of tetraploid triticale (2n= 4x=28), obtained from 6x triticalex2 rye progenies, were crossed with diploid and tetraploid rye, some durum and bread wheats, and various 8x and 6x triticale lines. meiosis in the different hybrid combinations was studied. the results showed that the haploid complement of these triticales consists of seven chromosomes from rye and seven chromosomes from wheat. high frequencies of pmcs showing trivalents were observed in hybrids involving the reference ... | 1985 | 24253010 |
| cytogenetic analysis of forms produced by crossing hexaploid triticale with common wheat. | hexaploid triticales were crossed with common wheats, and the resultant froms were selected for either triticale (ad 213/5-80) or common wheat (lines 381/80, 391/80, 393/80). the cytogenetic analysis showed that all forms differ in their chromosome composition. triticale ad 213/5-80 and wheat line 381/80 were stable forms with 2n = 6x = 42. lines 391/80 and 393/80 were cytologically unstable. in triticale ad 213/5-80, a 2r (2d) chromosome substitution was found. each of the three wheat lines had ... | 1985 | 24253064 |
| structural homology of endosperm high molecular weight glutenin subunits of common wheat (triticum aestivum l.). | several high molecular weight endosperm glutenin subunits, coded by genes located on chromosomes 1a, 1b and 1d of common wheat, triticum aestivum l. em. thell., were isolated from excised gel segments and subjected to amino acid analysis and peptide mapping; the latter was carried out following a limited digestion with trypsin, chymotrypsin or staphylococcus aureus - v8 protease. generally, all high molecular weight glutenins had a similar amino acid composition but several significant differenc ... | 1985 | 24253121 |
| ethylene and reactive oxygen species are involved in root aerenchyma formation and adaptation of wheat seedlings to oxygen-deficient conditions. | exposing plants to hypoxic conditions greatly improves their anoxic stress tolerance by enhancing the activities of glycolysis and fermentation in roots. ethylene may also be involved in these adaptive responses because its synthesis is increased in roots under hypoxic conditions. here it is reported that pre-treatment of wheat seedlings with an ethylene precursor, 1-aminocyclopropanecarboxylic acid (acc), enhanced accumulation of ethylene in the roots of wheat seedlings, and enhanced their tole ... | 2014 | 24253196 |
| qualitative/quantitative strategy for the determination of glufosinate and metabolites in plants. | a simple method for the simultaneous determination of glufosinate and its metabolites in plants based on liquid chromatography-ultraviolet (lc-uv) absorption detection after derivatization with fluorenylmethoxycarbonyl chloride (fmoc-cl) of some analytes to facilitate separation is reported here. nonavailable standard metabolites were identified by lc-tof/mass spectrometry (ms), which also confirmed all target analytes. ultrasound-assisted extraction was used for sample preparation (power of 70 ... | 2014 | 24253412 |
| a computer-assisted examination of the storage protein genetic variation in 841 accessions of triticum dicoccoides. | triticum turgidum l. var. dicoccoides (wild emmer) is an important genetic resource for increasing the protein content of common wheat (triticum aestivum l.). many studies have shown that the presence or absence of bands in sodium dodecyl sulfate polyacrylamide (sds-page) electrophoregrams of wheat storage proteins to be of a purely genetic character. a total protein extraction and sds-page technique was used to estimate the storage protein genetic variability among 841 accessions of wild emmer ... | 1984 | 24253627 |
| the meiotic pairing of nine wheat chromosomes. | the meiotic identification of nine pairs of chromosomes at metaphase i of meiosis of triticum aestivum (b genome, 4a and 7a) has been achieved using a giemsa c-banding technique. as a result, the analysis of the pairing of each chromosome arm in disomic and monosomic intervarietal hybrids between 'chinese spring' and the spanish cultivar 'pané 247' could be carried out. differences in the chiasmata frequencies per chromosome arm cannot be explained on the basis of relative arm lengths only. poss ... | 1984 | 24253711 |
| intrachromosomal mapping of the nucleolar organiser region relative to three marker loci on chromosome 1b of wheat (triticum aestivum). | restriction enzyme digestion of the ribosomal rna genes of the nucleolar organisers of wheat has revealed fragment length polymorphisms for the nucleolar organiser on chromosome 1b and the nucleolar organiser on 6b. variation between genotypes for these regions has also been demonstrated. this variation has been exploited to determine the recombination frequency between the physically defined nucleolar organiser on 1b (designatednor1) and other markers; two loci,glu-b1 andgli-b1 which code for e ... | 1985 | 24253819 |
| comparative genetic analyses of metric traits using diallel and factorial mating designs in bread wheat. | for studying the inheritance of metric traits, diallel cross and factorial mating designs are commonly used. since factorial mating design is less restrictive in crossing plans, the genetic information drawn from it was compared with that from a diallel cross. the comparison was made using graphical, genetic components and combining ability analyses for grain yield, grain weight and spike length in a field experiment of bread wheat (triticum aestivum l.). analyses were made on a nine parent dial ... | 1985 | 24253828 |
| growth and gibberellin-a1 metabolism in normal and gibberellin-insensitive (rht3) wheat (triticum aestivum l.) seedlings. | growth parameters were determined for tall (rht3) and dwarf (rht3) seedlings of wheat (triticum aestivum l.). plant statures and leaf length were reduced by 50% in dwarfs but root and shoot dry weights were less affected. leaves of dwarf seedlings had shorter epidermal cells and the numbers of cells per rank in talls and dwarfs matched the observed relationships in overall length. talls grew at twice the rate of dwarfs (2.3 compared with 1.2 mm h(-1)). [(3)h]gibberellin a1 ([(3)h]ga1) was fed to ... | 1984 | 24253843 |
| the effect of additions ofaegilops longissima chromosomes on grain protein in common wheat. | the effect of various chromosomes ofaegilops longissima when added to the common wheat cultivar 'chinese spring' was evaluated at two levels of nitrogen fertilization for absolute and relative amount of protein in the grain. all the added chromosomes ofae. longissima increased protein percentage: protein increase by chromosomes d, c and a averaged 3.8% while that by chromosomes f, e, g and b averaged 1.7%. addition lines f, d and c had a significantly higher protein weight per grain. on the othe ... | 1985 | 24253912 |
| role of d-genome chromosomes in photosynthesis expression in wheats. | the role of d-genome chromosomes in the expression of net photosynthesis in wheats was analysed with the nullitetrasomic and ditelosomic lines of the bread wheat cultivar 'chinese spring'. the two arms of chromosome 3 d and the short arm of chromosome 6 d control major mechanisms of photosynthesis. the effect of chromosome 6 d can be thoroughly compensated by that of its homoeologues of genomes a or b, contrary to what can be observed for chromosome 3 d. chromosome 7 d is responsible for the low ... | 1985 | 24253914 |
| characterization of a wheat germ agglutinin-like lectin from adult wheat plants. | radioimmuno-and enzyme-linked immunosorbent assays show that a substantial amount of wheat germ agglutinin(wga)-like protein is present at the base of the shoot and in the roots of adult wheat (triticum aestivum l.) plants. the protein can be purified by hapten-and antibody-mediated affinity procedures. it forms an arc of identity with the embryo lectin upon ouchterlony double-diffusion and is an active lectin that agglutinates trypsinized erythrocytes in an n-acetylglucosamine-and chitin-inhibi ... | 1984 | 24253947 |
| genetic control of endosperm proteins in wheat : 3. allocation to chromosomes and differential expression of high molecular weight glutenin and gliadin genes in intervarietal substitution lines of common wheat. | total endosperm proteins extracted from both several common wheat cultivars and some intervarietal substitution lines derived from them were fractionated according to their molecular weight in a high resolution one-dimensional gel electrophoresis. the four donor cultivars and the recipient one - 'chinese spring', possessed differentially migrating protein bands in the fractions of high molecular weight (hmw) glutenins and gliadins. several of these bands were identified for the first time in thi ... | 1985 | 24254017 |
| effect of the 1b/1r translocation on anther culture ability in wheat (triticum aestivum l.). | using two varieties, their reciprocal hybrids, f8 lines and doubled haploids, results confirmed that three genetic components are involved in wheat anther culture ability, viz embryo induction frequency, regeneration ability and the frequency of albinism. in these experiments, no significant maternal effects were noticed. for embryo yields, transgressive lines were obtained from hybrids between distant genotypes. regeneration of green plants depended upon two independent traits: regeneration abi ... | 1985 | 24254069 |
| the chromosome constitution of plants derived from pollen of hexaploid triticale x common wheat f1 hybrids. | the anthers of three f1 hybrids of hexaploid triticale and common wheat ('rosner' x 'kedong 58', 'beagle' x 'kedong 58' and 'beagle' x 'jinghua no. 1') were cultured on four media in vitro. more than 900 green plants were obtained. the chromosome numbers ranged from 17 to 27 for haploid derivatives and from 38 to 52 for diploid regenerates. the chromosome constitutions of the pollen plants reflect those of the gametes found in the donor plants (genome formula: aabbdr). the value of such pollen p ... | 1985 | 24254120 |
| the influence of temperature on chromosome elimination during embryo development in crosses involving hordeum spp., wheat (triticum aestivum l.) and rye (secale cereale l.). | several interspecific and intergeneric crosses involving five hordeum species, triticum aestivum and secale cereale were carried out to investigate the influence of two contrasting temperatures on chromosome elimination during embryo development. in four of the interspecific hordeum crosses, chromosome elimination was significantly increased at the higher of the two temperatures, resulting in greater proportions of haploid plant progenies. however, there was no significant effect of temperature ... | 1985 | 24254180 |
| a new approach for estimating the phytotoxicity limits. | a pot experiment was carried out on a typic ustipsamment to study the effect of cd concentration on the yield of wheat (triticum aestivum) and soybean (glycine max). cd levels taken were 1, 5, 10, 20, 40, 80, and 160 μg g(-1) of soil. three different statistical procedures were employed to evaluate the phytotoxicity limits. the non-linear regression technique was found to be more effective in calculating c 0 (threshold concentration) and c 100 (toxic concentration) in comparison to cate and nels ... | 1987 | 24254227 |
| development and characterisation of a line of bread wheat, triticum aestivum, which lacks the short-arm satellite of chromosome 1b and the gli-b1 locus. | about 360 offspring of a tri-parental cross were screened by gel electrophoresis and unexpectedly one of them did not contain chromosome 1b ω-gliadins derived from either of the primary parents. a line disomic for the ω-gliadin null was developed from the surviving embryo half of the unique grain. two dimensional electrophoresis revealed that all the storage protein genes at gli-b1, coding for γ-gliadins, β-gliadins and low-molecular-weight subunits of glutenin as well as the ω-gliadin, were not ... | 1984 | 24257642 |
| study on nuclear and cytoplasmic genome expression in wheat by two-dimensional gel electrophoresis : 2. genetic differences between two lines and two groups of cytoplasms at five developmental stages or organs. | two-dimensional gel electrophoresis of denaturated proteins were performed at five developmental stages or organs (hereafter referred to as stage-organs) on two wheat lines with four different cytoplasms. five hundred and fifty to 712 reproducible spots were scored depending on the stage-organ. each stage-organ is unambiguously characterized and several types of control of protein quantity are recorded. post-translational modifications are hypothetized and may sometimes be stagespecific. two cyt ... | 1984 | 24257643 |
| somatic embryogenesis and plant regeneration in callus from inflorescences of hordeum vulgare x triticum aestivum hybrids. | embryogenic callus cultures were obtained by culturing young inflorescence tissues of hordeum vulgare cv. 'pf51811' (2x)xtriticum aestivum cv. 'chinese spring' (6x) hybrids on 2,4-d-containing n6 medium. after subculture for about 10 months the calli retained a high potentiality for somatic embryogenesis and plant regeneration. of about 300 regenerated plants, approximately 100 were transplanted to potting soil. eight embryoids and three regenerated plants examined had 28 chromosomes identical t ... | 1984 | 24257648 |
| in vitro synthesis of lectins in cell-free extracts from dry wheat and rye embryos. | cell-free extracts from dry wheat (triticum vulgare l.) and rye (secale cereale l.) embryos do not synthesize their corresponding lectins when incubated under conditions optimalized for translation of either exogenous or endogenous mrna. only when the extracts are prepared and incubated in the complete absence of sulphydryl containing compounds lectins are synthesized in vitro. since immunoprecipitation techniques could not demonstrate unequivocally the presence of lectin among the cell-free tra ... | 1982 | 24257711 |
| chromosomal assignment of genes coding for the wheat gliadin protein components of the cultivars 'cheyenne' and 'chinese spring' by two-dimensional (two-ph) electrophoresis. | the gliadin proteins of the hexaploid bread wheat cultivar 'cheyenne' (triticum aestivum l. var. aestivum), which has good mixing and baking characteristics, were analyzed by 2-dimensional (2-ph) polyacrylamide gel electrophoresis (ph 3.2 in the 1st dimension, ph 9.2 in the 2nd). genes for most of the 35 resolved components were assigned to the chromosomes of homoeologous groups 1 and 6 through the use of various aneuploids and substitution lines. a similar analysis was carried out for the culti ... | 1984 | 24257826 |
| isolation and characterization of dna sequences from triticum aestivum which function as origins of replication in saccharomyces cerevisiae. | recombinant yip5 plasmids with the dna from triticum aestivum are capable of autonomous replication in saccharomyces cerevisiae. the ura transformants are unstable without selection pressure, and transformation of yeast cells with these plasmids occurs at high frequency. the cloned sequences were characterized and analyzed to state their belonging to triticum tribe. | 1983 | 24258044 |
| thylakoid protein kinase activity and associated control of excitation energy distribution during chloroplast biogenesis in wheat. | the activity of thylakoid protein kinase and the regulation of excitation energy distribution between photosystems i and ii was examined during chloroplast biogenesis in light-grown triticum aestivum (wheat) leaves. the specific activity of the thylakoid protein kinase decreased some six-fold during development from the young plastids at the base of the 7-d-old leaf to the mature chloroplasts at the leaf tip. appreciable activity was also detected in plastids isolated from etiolated leaves. in m ... | 1983 | 24258136 |
| control of lectins in triticum aestivum and aegilops umbellulata by homoeologous group 1 chromosomes. | each of the three genomes in hexaploid wheat controls the expression of a specific lectin in the embryo. the chromosomes which control their synthesis were determined using nullisomic-tetrasomic and inter-varietal chromosome substitution lines of 'chinese spring'. all three wheat lectins were shown to be controlled by the homoeologous group 1 chromosomes. using ditelosomic lines of 'chinese spring' the lectin genes could be localized on the long arms of chromosomes 1a and 1d. inter-specific addi ... | 1983 | 24258480 |
| metabolism of r,s-[2-(14)c]abscisic acid by non-stressed and water-stressed detached leaves of wheat (triticum aestivum l.). | metabolism of r,s-[2-(14)c]abscisic acid (aba) was studied in detached leaves of six wheat (triticum aestivum) cultivars, using non-stressed leaves or leaves water stressed by desiccation to 90% of their original fresh weight. the rate constant of aba metabolism was similar in nonstressed leaves of all cultivars. water stress resulted in significantly lower rate constants in two cultivars which accumulated high levels of aba when stressed, the constants decreasing by a factor of about 1.5. rate ... | 1984 | 24258508 |
| chromosome variation in wheat plants regenerated from cultured immature embryos. | a cytological study has been made of plants regenerated from cultured immature embryos of four wheat cultivars (triticum aestivum, 2n = 6x = 42). in total, 29% of the 192 plants examined were aneuploid with a range in chromosome numbers of 38-45. evidence of chromosome structural changes was also found. this variation occurred in regenerants of all four cultivars, but there were large differences in the proportions of aneuploids arising from individual cultures which meant that no significant di ... | 1984 | 24258556 |
| identification of c-banded chromosomes in meiosis of common wheat, triticum aestivum l. | the c-banding pattern of nine meiotic chromosomes of common wheat (triticum aestivum l.) as described. in f1s of crosses between monosomics of 'chinese spring' and two spanish wheat cultivars, univalent chromosomes were used to aid the recognition and analysis of the c-banding pattern for the individual chromosomes. the identification of one chromosome involved in one translocation in 'chinese spring' x 'pané 247' has been made through heterochromatin bands observed in the chromosomes involved i ... | 1984 | 24258557 |
| cultivar and cultivar x environment effects on the development of callus and polyhaploid plants from anther cultures of wheat. | plants of three common wheat (triticum aestivum l. em. thell) cultivars and one randomly selected doubled-haploid line derived by anther culture from each of the three cultivars were each grown in three environments, a field environment, a greenhouse environment, and a growth chamber environment. anthers containing largely miduninucleate to late uninucleate microspores were cultured and calli were induced to regenerate plants in order to assess the effects of cultivar, cultivar family (cultivar ... | 1984 | 24258560 |
| metabolism of activated oxygen in detached wheat and rye leaves and its relevance to the initiation of senescence. | the activities of several enzymes either generating or decomposing o 2 (-) or h2o2, were investigated during the course of senescence of detached wheat (triticum aestivum l.) and rye (secale cereale l.) leaves in light and in darkness. most of the activities, although not in full synchrony, declined with the degradation of chlorophyll and protein. the decline was slower in light than in darkness (e.g. glycolate oxidase, ec 1.1.3.1; urate oxidase, ec 1.7.3.3.; catalase, ec 1.11.1.6) and was furth ... | 1984 | 24258664 |
| nad-dependent aromatic alcohol dehydrogenase in wheats (triticum l.) and goatgrasses (aegilops l.): evolutionary genetics. | evolutionary electrophoretic variation of a nad-specific aromatic alcohol dehydrogenase, aadh-e, in wheat and goatgrass species is described and discussed in comparison with a nad-specific alcohol dehydrogenase (adh-a) and a nadp-dependent aadh-b studied previously. cultivated tetraploid emmer wheats (t. turgidum s. l.) and hexaploid bread wheats (t. aestivum s. l.) are all fixed for a heterozygous triplet, e(0.58)/e(0.64). the slowest isoenzyme, e(0.58), is controlled by a homoeoallelic gene on ... | 1984 | 24258843 |
| heritability of grain yield, plant height and test weight of a population of winter wheat adapted to southwestern ontario. | grain yield, plant height and test weight were studied in a population of winter wheat (triticum aestivum l.). the population consisted of f2 bulk populations of 42 crosses among 11 genotypes adapted to s. w. ontario. heritabilities were: 0.30±0.32 for yield, 0.77±0.15 for height and 0.98±0.08 for test weight. predicted genetic gain with 10% selection intensity was 0.15 t/ha for yield, 10.1 cm for height and 3.00 kg/hl for test weight. the low heritability for yield indicates that effective sele ... | 1984 | 24258938 |
| analysis of nucleolar activity in agropyron elongatum, its amphiploid with triticum aestivum and the chromosome addition lines. | the nucleolar organizer activity of the agropyron elongatum, its amphiploid with hexaploid wheat (triticum aestivum) and the chromosome addition lines is analyzed by the silver-staining procedure. four ag-nors are observed in a. elongatum corresponding to the chromosomes 6e and 7e. in the amphiploid t. aestivum - a. elongatum, eight ag-nors are observed which corresponds the wheat chromosomes 1b and 6b and to the elongatum chromosomes 6e and 7e. thus, there is codominance in the nucleolar organi ... | 1984 | 24258946 |
| combining abilities and heritability of callus formation and plantlet regeneration in wheat (triticum aestivum l.) anther cultures. | frequency of callus formation in wheat (triticum aestivum l. em. thell) anthers cultured in vitro and the frequency of subsequent plantlet formation from such calli were examined in a diallel population produced from five inbred spring wheat cultivars. two of the five cultivars were believed to possess relatively high frequencies of response and the other three relatively low response frequencies, based on previous studies. general and specific combining abilities were estimated and found to be ... | 1984 | 24258955 |
| production and characterization of alloplasmic lines of a triticale 'rosner'. | the transfer of cytoplasms of various triticum and aegilops species to a hexaploid triticale ('rosner') has been attempted using 30 alloplasmic lines and a euplasmic line of common wheat as cytoplasmic donors. the average rate of f1 hybrid production (seed setting ratexgermination rate) following an ordinary method of crossing is only 0.09%, whereas this rate is increased to 3.1% by use of embryo culture. the first backcross of the f1 plants with triticale pollen is again difficult, the hybrid p ... | 1984 | 24258961 |
| difference in hydroxamic acid content in roots and root exudates of wheat (triticum aestivum l.) and rye (secale cereale l.): possible role in allelopathy. | hydroxamic acids (hx) produced by some cereal crops have been associated with allelopathy. however, the release of hx to the soil by the producing plant-an essential condition for a compound to be involved in allelopathy-has not been shown. gc and hplc analysis of roots and root exudates of wheat (triticum aestivum l.) and rye (secale cereale l.) cultivars, with high hx levels in their leaves, demonstrated the presence of these compounds in the roots of all cultivars analyzed and in root exudate ... | 1991 | 24259166 |
| sequence-based analysis of translocations and inversions in bread wheat (triticum aestivum l.). | structural changes of chromosomes are a primary mechanism of genome rearrangement over the course of evolution and detailed knowledge of such changes in a given species and its close relatives should increase the efficiency and precision of chromosome engineering in crop improvement. we have identified sequences bordering each of the main translocation and inversion breakpoints on chromosomes 4a, 5a and 7b of the modern bread wheat genome. the locations of these breakpoints allow, for the first ... | 2013 | 24260197 |
| generation of doubled haploid transgenic wheat lines by microspore transformation. | microspores can be induced to develop homozygous doubled haploid plants in a single generation. in the present experiments androgenic microspores of wheat have been genetically transformed and developed into mature homozygous transgenic plants. two different transformation techniques were investigated, one employing electroporation and the other co-cultivation with agrobacterium tumefaciens. different tissue culture and transfection conditions were tested on nine different wheat cultivars using ... | 2013 | 24260351 |
| increasing grain protein content of hard red winter wheat (triticum aestivum l.) by mutation breeding. | poor adaptability or functional quality of much germplasm used for breeding high-protein hard red winter wheats prompted mutagenesis as an alternative means of increasing grain protein content. four hard red winter wheat genotypes - ks644 ('triumph// concho/triumph'), 'kaw', 'parker', and 'shawnee' - were treated with 0.40 m ethyl methanesulfonate (ems). advanced lines (m8-m10) were selected that had a 3-year mean grain protein advantage of 0.7% to 2.0% over controls. increased grain protein con ... | 1983 | 24263199 |
| the use of irradiated pollen for differential gene transfer in wheat (triticum aestivum). | the use of irradiated pollen to bring about limited gene transfer in wheat has been investigated. doses of x-rays of 2kr, 3kr and 5kr were used to generate m1 progeny between maternal and paternal genotypes differing in quantitative and major gene characters. cytological studies of m1 plants revealed hybrids with widespread aneuploidy and structural rearrangements in the paternal genome. these effects resulted in phenotypic variation between m1 progeny and complex multivalent formation at meiosi ... | 1983 | 24263337 |
| responses of alloplasmic (cytoplasm=triticum timopheevii) and euplasmic wheats (triticum aestivum) to photoperiod and vernalization. | studies were conducted to determine the influence of the male sterility-inducing cytoplasm of triticum timopheevii (zhuk.) zhuk. on response of several common winter wheat (t. aestivum l.) nuclear genotypes to photoperiod and vernalization. comparative studies of cytoplasmic substitution lines provide information on the role of the cytoplasmic genetic mechanism in growth and development. in the case of cytoplasmic male sterility-based hybrid production systems, ubiquity of sterility-inducing cyt ... | 1983 | 24263632 |
| genetic control of endosperm proteins in wheat : 2. variation in high molecular weight glutenin and gliadin subunits of triticum aestivum. | endosperm protein subunits of 109 primitive and modern lines of hexaploid wheat, triticum aestivum l. em. thell., were fractionated by one-dimensional, high resolution, sodium dodecyl sulphate (sds) polyacrylamide gel electrophoresis (page). a wide range of both qualitative and quantitative variation was observed in the fractions of the high molecular weight (hmw) glutenin and gliadin subunits of the different lines. the qualitative variation was expressed in the number of subunits per fraction ... | 1983 | 24263634 |
| the response of anther culture to culture temperature in triticum aestivum. | the response of anther culture to culture temperature was studied in detail using many varieties, f1 hybrids and pollen-derived lines of wheat (triticum aestivum) as materials. the suitable culture temperature for inducing pollen callus (or embryoids) in wheat anther culture ranged from 26 °c to 30 °c, varying with genotypes. but for the great majority of wheat genotypes the suitable culture temperatures lay between 28 °c and 30°c. the most significant genotypic variation in the response to cult ... | 1983 | 24263762 |
| new hybrids between agropyron and wheat : 2. production, morphology and cytogenetic analysis of f1 hybrids and backcross derivatives. | intergeneric hybrids of triticum aestivum (2n=42,aabbdd) with agropyron ciliare (2n= 28,ssyy), a. trachycaulum (2n=28,sshh), a. yezoense (2n=28,ssyy) and a. scirpeum (2n=28) are reported for the first time. f1 hybrids of t. aestivum were also produced with a. intermedium (2n=42,e1e1e2e2z1z1) and a. junceum (2n=14,juju). all wheat-agropyron hybrids were obtained by embryo rescue technique. cultivars and reciprocal crosses differed for seed set, seed development and f1 plant production. the f1 hyb ... | 1983 | 24263763 |
| the relationship between the rht 1 and rht 2 dwarfing genes and grain weight in triticum aestivum l. spring wheat. | the study was carried out in the first year on samples of random f5 lines, uniform in height and in heading date, of three crosses between semi dwarf spring wheat cultivars (triticum aestivum l.), differing in grain weight and in their rht gene. in the second year only the progenies of the early heading f5 lines were studied. all the material was grown in the absence of lodging. the culm-length genotypes of the different lines were identified by test crosses and by a seedling ga response test. n ... | 1983 | 24263770 |
| devil's-claw (proboscidea louisianica), essential oil and its components : potential allelochemical agents on cotton and wheat. | the potential allelopathic activity of devil's-claw [proboscidea louisianica (mill.) thellung] essential oil and a few of the compounds it contains on the elongation of cotton (gossypium hirsutum l.) and wheat (triticum aestivum l.) radicles was studied using a petri dish bioassay. essential oil was collected by steam distillation using an all-glass-teflon assembly. ether extracts of the steam distillates from fresh devil's-claw were inhibitory to cotton and wheat radicle elongation. the followi ... | 1990 | 24263996 |
| allelochemicals in soil from no-tillage versus conventional-tillage wheat (triticum aestivum) fields. | putative allelochemicals found in the soil of no-tillage and conventional-tillage wheat plots near stillwater, oklahoma, were obtained by a mild alkaline aqueous extraction procedure, bioassayed to determine their biological activity, purified, and analyzed with a capillary gas chromatography-mass spectrometry-data analysis system. the most significant inhibition was found in bioassays of extracts from soil collected immediately after harvest in june, july, and august. no-tillage soils produced ... | 1990 | 24264093 |
| influence of lectins on female sex pheromone reception byheterodera schachtii (nematoda: heteroderidae) males. | a bioassay was developed in which the chemotactic behavior of males of the sugarbeet cyst nematodeheterodera schachtii towards the female sex pheromone can be observed and documented at any time. the standardized test, performed under sterile conditions, gives reproducible results within 1-2 hr. incubation of males with the lectins fromcanavalia ensiformis, triticum vulgare, arachis hypogaea, helix pomatia, andlimax flavus did not affect chemotactic attraction to the sex pheromone. supplementing ... | 1990 | 24264204 |
| nuclear dna content and the control of chloroplast replication in wheat leaves. | during development of the first leaf of breadwheat (triticum aestivum l.) the number of chloroplasts per mesophyll cell increases between three- and four-fold. to establish if chloroplast replication is accompanied by endoreduplication, the nuclear dna content of the cells was determined by chemical assay of isolated nuclei from mesophyll protoplasts and by microdensitometry of nuclei in mesophyll tissue. the dna content of the nuclei was constant (27 to 32 pg) at each phase of chloroplast repli ... | 1983 | 24264273 |
| changes in 1-(malonylamino)cyclopropane-1-carboxylic acid content in wilted wheat leaves in relation to their ethylene production rates and 1-aminocyclopropane-1-carboxylic acid content. | in excised wheat (triticum aestivum l.) leaves, water-deficit stress resulted in a rapid increase, followed by a decrease, in ethylene production rates and in the levels of 1-aminocyclopropane-1-carboxylic acid (acc), the immediate precursor of ethylene. however, the level of n-malonyl-acc (macc), the major metabolite of acc, increased gradually, then leveled off. this increase in macc was much greater than the decrease in acc level. the macc levels were positively correlated with severity of wa ... | 1983 | 24264416 |
| the composition of free fatty acids and mitochondrial activity in seedlings of winter cereals under cold shock. | cold shock (-4° c, 1 h) induces qualitative and quantitative changes in the composition of free fatty acids in mitochondria of winter-hardy cereals (secale cereale l.,triticum aestivum l.). the amount of these compounds and the degree of their unsaturation increases. simultaneously, a marked change occurs in the oxidative and phophorylative activities of the mitochondria: respiratory control decreases, respiration in state 4 and antimycin a-resistant respiration increase. the changes in mitochon ... | 0 | 24264607 |
| regulation of swelling of etiolated-wheat-leaf protoplasts by phytochrome and gibberellic acid. | the effect of light on the size of intact protoplasts isolated from the primary leaves of etiolated triticum aestivum was studied. a 2-min red-light irradiation in the presence of 1 mm kcl was sufficient to cause a swelling of protoplasts compared with those maintained in darkness. the effect was photoreversible by far-red light over two light cycles, indicating the involvement of phytochrome. at 4°c, escape from reversibility occurred between 2 and 5 min after the exposure to red light. in expo ... | 1983 | 24264850 |
| genetic control of endosperm proteins in wheat : 1. the use of high resolution one-dimensional gel electrophoresis for the allocation of genes coding for endosperm protein subunits in the common wheat cultivar chinese spring. | total endosperm protein subunits, extracted from the common wheat cultivar chinese spring and from some of its aneuploid lines, were fractionated according to their molecular weight (mw) in an improved high resolution one-dimensional sodium dodecyl sulphate (sds) polyacrylamide gel electrophoresis (page). the resolution obtained by this method and, in particular, that of the high molecular weight (hmw) glutenin and gliadin subunits approached that of a previous report in which two-dimensional fr ... | 1983 | 24264866 |
| study of genetic determination of 20 gliadin bands. | study of the genetic determination of the gliadins of two f2 progenies from bread wheat has enabled (1) confirmation of the co-dominant heredity of the presence of these bands in the f1, and (2) determination of the transmission of the presence/absence character for 20 bands. 10 bands are monogenically controlled; 10 others are coded by two pairs of alleles. among the latter 2 bands split into two proteins in 2 dimensional electrophoresis. analysis of the segregations, not taking into considerat ... | 1983 | 24264876 |
| correlation between gliadin bands. | starch gel electrophoresis of gliadins was carried out for 37 bread wheat cultivars chosen for their distant relationships. simple correlations were calculated between each of the 41 bands (variates) observed with these wheats. it was found that a band is usually negatively correlated with the two neighbouring mobility bands. the number of bands positively or negatively correlated with a given band varies from 2 to 8. taking the bands significantly positively correlated with each-other 32 groups ... | 1983 | 24264877 |
| the chromosomal location of malate dehydrogenase isozymes in hexaploid wheat (triticum aestivum l.). | the malate dehydrogenase (e.c. no 1.1.1. 37) of triticum aestivum l. cv. chinese spring, shows two activity zones. the results obtained support the hypothesis that the malate dehydrogenase isozymes of zone ii are dimers composed of the six possible combinations of subunits coded by triplicate genes located in the long arms of chromosomes of the homoeologous group 1. | 1983 | 24264953 |
| genetic studies of the crossability of hexaploid wheat with rye and hordeum bulbosum. | crosses of wheat (triticum aestivum l.) group 5 chromosome substitution lines from three different cultivar backgrounds indicate that there may be multiple alleles for reduced crossability with rye (secale cereale l.) and h. bulbosum on both 5a and 5b chromosomes. no reduction in seed set was observed from any of the 5d substitution lines. it was found that the kr1 locus on chromosome 5b had a more pronounced affect on both rye and h. bulbosum crossability than the kr2 locus on chromosome 5a and ... | 1983 | 24265078 |
| identification of a novel lea protein involved in freezing tolerance in wheat. | late embryogenesis abundant (lea) proteins are a family of hyper-hydrophilic proteins that accumulate in response to cellular dehydration. originally identified as plant proteins associated with seed desiccation tolerance, lea proteins have been identified in a wide range of organisms such as invertebrates and microorganisms. lea proteins are thought to protect proteins and biomembranes under water-deficit conditions. here, we characterized wci16, a wheat (triticum aestivum) protein that belongs ... | 2014 | 24265272 |
| genome-specific granule-bound starch synthase i (gbssi) influences starch biochemical and functional characteristics in near-isogenic wheat ( triticum aestivum l.) lines. | near-isogenic wheat ( triticum aestivum l.) lines differing at the waxy locus were studied for the influence of genome-specific granule-bound starch synthase i (gbssi/waxy; wx-a, wx-b, wx-d) on starch composition, structure, and in vitro starch enzymatic hydrolysis. grain composition, amylose concentration, amylopectin unit-chain length distribution, and starch granule size distribution varied with the loss of functional gbssi. amylose concentration was more severely affected in genotypes with g ... | 2013 | 24266496 |
| the chromosomal location of factors determining the presence of phenolic compounds in wheat (triticum aestivum l.). | using thin-layer chromatography and nulli-tetrasomic and ditellosomic series of triticum aestivum l. cv. 'chinese spring', it has been possible to relate the phenolic compounds found in adult plant leaves and 12 day-old seedling leaves with the chromosomes or chromosome arms 1 b, 2 bl, 3 bl, 5 a, 6 al, 7 b and 7 ds. | 1982 | 24270333 |
| cytogenetic structure of common wheat cultivars from or introduced into spain. | chromosome arrangements of twenty-eight cultivars of common wheat, triticum aestivum l., from or introduced into spain are compared with that of 'chinese spring' taken as a pattern. all the cultivars analyzed differ from 'chinese spring' by one or two reciprocal translocations. when 12 out of 28 cultivars were compared it was concluded that a minimum number of thirteen interchanges are present, involving at least ten different chromosomes of the complement. the interest of a reappraisal of the r ... | 1982 | 24270334 |
| n-banding in triticum aestivum following feulgen hydrolysis. | terminal and/or interstitial n-bands were produced on the seven b-genome chromosomes and chromosomes 4 and 7 of the a-genome of triticum aestivum cv. 'chinese spring' by a modified bsg technique following a standard feulgen preparation. the banding was accomplished by modifying the barium hydroxide treatment. | 1982 | 24270495 |
| effect of the d genome and of selection on photosynthesis in wheat. | photosynthesis and transpiration in wheats and in their progenitors were analyzed in relation to their genome, ploidy and selection. the values of these parameters markedly depend on a specific effect of the d genome and on leaf enlargement in the course of evolution in wheats. leaf enlargement has had a marked effect on photosynthesis in the genotypes that are devoid of the d genome; in addition, their photosynthetic capacity is greater in forms with lower leaf area. the increase in the mesophy ... | 1982 | 24270498 |
| epistatic, additive and dominance variation in a triple test cross of bread wheat (triticum aestivum l.). | triple test cross progenies resulting from the crossing of three testers ('kloka', 'up 368' and an f1 intermediate between them) and 24 varieties of bread wheat have been studied for plant height (cm), peduncle length (cm), ear length (cm), number of spikelets per spike and harvest index (ratio between economic and total yield). epistasis was not significant for any of the characters studied. the testers were inadequate for plant height and for peduncle length although the testers varied conside ... | 1982 | 24270534 |
| anther culture of wheat (triticum aestivum l.) f1's and their reciprocal crosses. | anthers from three sets of wheat (triticum aestivum l. em. thell) f1's and their reciprocal crosses, made between parental lines differing greatly in their ability to produce microspore derived callus, were cultured on the chinese potato medium so that we could 1) more clearly define the role of nuclear or cytoplasmic factors within t. aestivum in transferring the ability to undergo in vitro androgenesis, and 2) to briefly review the gametic representation and disease screening potential of the ... | 1982 | 24270565 |
| impact of biparental mating on correlation coefficients in bread wheat. | phenotypic and genotypic correlation coefficients and path-coefficients were studied in the biparental (bips) and f3 self progenies of the two wheat crosses. a comparison of correlation coefficients in the bips and the f3's revealed that as many as twelve new significant correlations were noticed in case of the bips in cross i although some of them occurred in the undesirable direction. on the other hand, only three new correlations were observed in the bips of cross ii, although as many as fift ... | 1982 | 24270654 |
| pollen callus culture in triticum aestivum. | pollen shed between 4-8 d from anthers of triticum aestivum cultured in liquid medium gave rise to calluses. tillers were harvested at the mid-to late-unicellular pollen stages and chilled for 8 d at 4-5 °c before the anthers were dissected out. pollen cultures gave about 6 times as many calluses on a per anther basis as anthers cultured on solid medium. with the most productive of 5 cultivars tested, pollen culture results in roughly one callus for each anther used, though the calluses formed b ... | 1982 | 24270703 |
| relationships of agropyron intermedium chromosomes determined by chromosome pairing and alcohol dehydrogenase isozymes in common wheat background. | the relationships of agropyron intermedium chromosomes in two wheat-agropyron addition series were determined. chromosome pairing behaviour revealed that the alien chromosome in lines taf-2 and l7 of 'vilmorin'-a. intermedium set are homologous to the alien chromosomes in lines p and c of the 'caribo'-a. intermedium set respectively. localization of alcohol dehydrogenase isozyme genes in 'vilmorin'-agropyron addition line l4 and in 'caribo'-agropyron line o indicated relationships with wheat chr ... | 1982 | 24270819 |
| the wheat ribosomal dna spacer region: its structure and variation in populations and among species. | the wheat rdna clone pta250 was examined in detail to provide a restriction enzyme map and the nucleotide sequence of two of the eleven, 130 bp repeating units found within the spacer region. the 130 bp units showed some sequence heterogeneity. the sequence difference between the two 130 bp units analysed (130.6 and 130.8) was at 7 positions and could be detected as a 4 °c shift in tm when heterologous and homologous hybrids were compared. this corresponded to a 1.2% change in nucleotide sequenc ... | 1982 | 24270871 |
| mapping of the hor-3 locus encoding d hordein in barley. | the hordein storage proteins of barley (hordeum vulgare l.) are of intense interest due to their genetic diversity and prominence and impact on the industrial and agricultural uses of the seed. two major hordein loci have been previously mapped on chromosome 5 (hor-1 and hor-2 encoding the c and b hordeins, respectively). a third major locus, hor-3, which codes for d hordein, has been located in the centromeric region of chromosome 5, probably on the long arm. two allelic variants with apparent ... | 1982 | 24270874 |
| cdna cloning, in vitro transcription and partial sequence analysis of mrnas from winter wheat (triticum aestivum l.) with induced resistance to erysiphe graminis f. sp. tritici. | under normal growth conditions wheat shows 100% non-host resistance to the barley powdery mildew erysiphe graminis f. sp. hordei (egh.). primary inoculation of 7-day-old wheat seedlings with this fungus induced partial (60-70%) local resistance to challenge inoculation 12 hours later with the compatible pathogen erysiphe graminis f. sp. tritici (egt). mrna was isolated from induced resistant first leaves (13 hours after primary inoculation) and a cdna library was established in lambda zap. diffe ... | 1989 | 24271197 |
| histochemical localization of nucleotide pyrophosphatase and cyclic nucleotide phosphodiesterase in seeds and shoots of triticum. | the activities of potato nucleotide pyrophosphatase and cyclic nucleotide phosphodiesterase against a common substrate, p-nitrophenyl thymidine 5'-phosphate and its histochemical analogue, as-bi-naphthyl thymidine 5'-phosphate, were determined with the aid of relatively specific inhibitors, nad and 2',3'-camp, respectively. these inhibitors were utilized to reexamine wheat (triticum aestivum l. cv. mironovska 808) seeds and 3-5-d old shoots for the occurrence and histochemical localization of nu ... | 1982 | 24271768 |
| phytotoxicity of water-soluble substances from alfalfa and barley soil extracts on four crop species. | problems associated with continuously planting alfalfa (medicago saliva l.) or seeding to thicken depleted alfalfa stands may be due to autotoxicity, an intraspecific form of allelopathy. a bioassay approach was utilized to characterize the specificity and chemical nature of phytotoxins in extracts of alfalfa soils as compared to fallow soil or soil where a cereal was the previous crop. in germination chamber experiments, water-soluble substances present in methanol extracts of soil cropped to a ... | 1989 | 24271803 |
| the properties of transketolase from photosynthetic tissue. | transketolase (e.c. 2.2.1.1.) has been partially purified from wheat (triticum aestivum, cv. sappo) and spinach (spinacia oleracea) leaves. the fully-active enzyme is a tetramer of relative molecular mass (mr) of 150 kmr requiring thiamin pyrophosphate for maximal activity, and dissociating into a 74 kmr dimer in its absence or in dilute solution. the chloroplastic transketolase (over 75% of the cellular total) is magnesium-stimulated but the cytosolic form is magnesium-insensitive. both chlorop ... | 1982 | 24271866 |
| the effect of plant-hormone pretreatments on ethylene production and synthesis of 1-aminocyclopropane-1-carboxylic acid in water-stressed wheat leaves. | excised wheat (triticum aestivum l.) leaves, when subjected to drought stress, increased ethylene production as a result of an increased synthesis of 1-aminocyclopropane-1-carboxylic acid (acc) and an increased activity of the ethyleneforming enzyme (efe), which catalyzes the conversion of acc to ethylene. the rise in efe activity was maximal within 2 h after the stress period, while rehydration to relieve water stress reduced efe activity within 3 h to levels similar to those in nonstressed tis ... | 1982 | 24271976 |
| lectin synthesis in developing and germinating wheat and rye embryos. | wheat (triticum aestivum l.) and rye (secale cereale l.) lectins are specifically synthesized during seed formation. they accumulate exponentially in the primary axes in a period coinciding with the development of this complex organ. since the specific lectin content also increases dramatically, there is apparently an outburst of lectin synthesis during the development of the primary axes. germinating embryos also synthesize some lectin. the fortunate availability of a highly specific procedure ... | 1982 | 24272214 |
| variation in the wheat ap2 homoeologs, the genes underlying lodicule development. | the bread wheat genome harbors three homoeologs of the barley gene hvap2, which determines the cleistogamous/non-cleistogamous flowering. the three homoeologs, taap2-a, taap2-b and taap2-d, are derived from the a, b and d genomes. the importance of lodicule swelling in assuring non-cleistogamous flowering in a range of wild and domesticated wheat accessions of varying ploidy level was established. re-sequencing of wheat ap2 homoeologous genes was carried out to identify natural variation at both ... | 2013 | 24273420 |
| effect of choline chloride on fatty acid chain ordering in membranes of wheat (triticum aestvium l. cv. miranovskaja 808). | a winter variety (miranovskaja 808) of wheat (triticum aestivum l.) was grown in water cultures containing 0, 5, 15, 30, and 60 mm choline chloride. there was an increase in the phosphatidylcholine level at the expense of phosphatidic acid, parallel with an increasing choline concentration in the cultivating medium. while the ratio of free sterols to phospholipids remained essentially constant in the seedlings, there was an increase in the ratio of saturated-to-unsaturated fatty acids of the pho ... | 1981 | 24275821 |
| the golgi apparatus in developing endosperm of wheat (triticum aestivum l.). | the ultrastructure and distribution of the golgi apparatus in developing wheat endosperm was investigated using a zinc iodide-osmium tetroxide staining complex in conjunction with low and high voltage electron microscopy. dictyosomes were numerous in starchy endosperm and aleurone at 15 days after anthesis, and during the period of rapid storage protein deposition 25 d after anthesis. fewer dictyosomes were seen in maturing endosperm. two types of vesicles were associated with the dictyosomes; s ... | 1982 | 24276072 |
| changes in the content of modified nucleotides of total transfer rna of wheat seedlings during greening. | the contents in minor nucleotides of total transfer rna (trna) of etiolated and light-grown wheat (triticum aestivum l.) seedlings and of seedlings illuminated for 24 or 48 h were examined. the total trna of seedlings illuminated 24 h contained more, and that from seedlings illuminated 48 h still more modified nucleotides than that from etiolated ones. thus, the appearance of the characteristic minor nucleotides of trna of light-grown wheat seedlings needs a rather long greening period, of at le ... | 1982 | 24276266 |
| characterization of the caryopsis of common wheat varieties and f2 generation hybrids by means of multivariate analysis. | nineteen parameters of common wheat kernels were investigated by the multivariate procedure. a relationship between the dbc parameter and both specific gravity and kernel filling was found. in some populations an interdependence of the dbc parameter and the subaleurone endosperm thickness was found. in the analysis of principal components the dbc parameter was represented mostly by particular component. significant dependences were found between the dimensions as well as the weight of the caryop ... | 1981 | 24276327 |
| a genetic basis for the origin of six different isolectins in hexaploid wheat. | wheat (triticum aestivum) germ agglutinin represents a complex mixture of multiple isolectin forms. upon ion exchange chromatography at ph 3.8, three isolectins can be separated, each of which is composed of two identical subunits. at ph 5.0, however, three additional isolectins can be distinguished, which are built up of two different subunits (heteromeric lectins). evidence is presented that these heterodimers are normal constituents of the wheat embryo cells. analyses of the isolectin pattern ... | 1982 | 24276352 |
| the induction of sensitivity to gibberellin in aleurone tissue of developing wheat grains : i. the effect of dehydration. | aleurone layers from immature developing wheat grains (triticum aestivum l. cvs. sappo. and champlein), though normally insensitive, can be made to produce α-amylase in response to gibberellic acid by subjecting the grains to a period of enforced dehydration prior to introduction to the hormone. the change in sensitivity appears to depend upon the water content of the tissue, water levels of below approximately 25% being critical for the effect. grain detachment or duration of drying apparently ... | 1982 | 24276354 |
| the induction of sensitivity to gibberellin in aleurone tissue of developing wheat grains : ii. evidence for temperature-dependent membrane transitions. | aleurone tissue from undried immature developing wheat grains (triticum aestivum l. cv. sappo), normally insensitive to gibberellic acid, can be made to respond to the hormone by a series of temperature treatments. incubation of the de-embryoed grains at temperatures above 27° c for at least 8 h causes the tissue to become sensitive. prolonged incubation at temperatures below 27° c does not effect a change in sensitivity. in addition to the requirement for exposure to an elevated temperature for ... | 1982 | 24276355 |
| an evaluation of mitochondrial heterosis and in vitro mitochondrial complementation in wheat, barley and maize. | two families each of wheat (triticum aestivum l.), barley (hordeum vulgare l.) and maize (zea mays l.) were studied for mitochondrial heterosis and in vitro mitochondrial complementation. inbred parents and their hybrids were compared for seedling heights and rate of oxygen uptake by the whole tissue to find out if the hybrids showed greater growth and respiratory activity at the seedling stage. further comparisons were made by isolating mitochondria from the seedling tissues and measuring their ... | 1981 | 24276441 |
| monosomic analysis of genes for resistance against stem rust races in bread wheat. | using monosomic analysis genes governing resistance in one wheat variety, 'e5883', against stem rust races 15c and 122, were located on specific chromosomes. against race 15c, a major dominant gene, sr6, was located on chromosome 2d of 'e5883' with minor modifiers found on chromosomes 4a and 6d. against race 122, the presence of a recessive hemizygous ineffective gene, sr8, was identified, located on chromosome 6a of variety 'e5883'. | 1981 | 24276516 |