| effect of light and gibberellic acid on cell division in the first foliage leaf of durum wheat (triticum durum desf.). | the present paper is part of a research program which aims at a quantitative analysis of the effects of light and gibberellic acid (ga3) on growth of the first foliage leaf in durum wheat (triticum durum desf.). since leaf growth is the combined result of the increase in cell number (cell division) and cell enlargement, the influence of light and ga3 treatment on cell division in the basal meristem of the first leaf in two cultivars, cappelli and creso, was investigated. creso is a short-strawed ... | 1988 | 24226406 |
| the structure of a high-mr subunit of durum-wheat (triticum durum) gluten. | a high-mr subunit was prepared from durum wheat (triticum durum). viscometric analysis showed that the molecule is rod-shaped, with molecular dimensions of about 50 nm x 1.75 nm (500 a x 17.5 a) in 0.05 m-acetic acid/0.01 m-glycine and 49 nm x 1.79 nm (490 a x 17.9 a) in aq. 50% (v/v) propan-1-ol (+/- 0.01 m-glycine) at 30 degrees c. c.d. spectroscopy in the same solvents indicated the presence of beta-turns, but little alpha-helix [7% in 50% (v/v) propan-1-ol] and no beta-sheet. however, when d ... | 1987 | 3689346 |
| evaluation of lead, cadmium, chromium, copper and zinc by atomic absorption spectroscopy in durum wheat milling products in relation to the percentage of extraction. | 36 samples representative of the 1981 italian durum wheat crop were separated by an industrial italian milling process and the products obtained analyzed by aas for their pb, cd, cr, cu, zn content. the results obtained were: pb ranging from 0.04 to 0.80 ppm, cd from 0.02 to 1.39 ppm, cr from 0.05 to 1.60 ppm, cu from 1.8 to 39.7 ppm and zn from 8.8 to 117.6 ppm. although cr content was relatively homogeneous, pb, cd, cu and zn distribution in the various mill products proved to be rather inhomo ... | 2013 | 3678530 |
| purification and characterization of variant alcohol dehydrogenase isozymes from durum wheat. | three alcohol dehydrogenase (adh) isozymes from embryos of the durum wheat cultivar bijaga yellow having the variant adh-alb allele were purified using (nh4)2so4 precipitation, gel filtration, and ion-exchange chromatography. adh is a dimeric enzyme. the variant isozyme adh-1-1, which is a homodimer composed of alpha b monomers, was compared with adh-1-5 (homodimer composed of beta a monomers), the product of adh-b1, and the adh-1-3 isozyme (alpha b beta a heterodimer) on a number of parameters ... | 1987 | 3447591 |
| graphical evaluation and partitioning of turgor responses to drought in leaves of durum wheat. | the relationship between relative water content (r) and turgor potential (ψp) may be derived from pressure-volume (pv) curves and analyzed in various ways. fifty pv curves were measured with the pressure chamber on leaves of durum wheat (triticum durum l.). the plots of ψp versus r were highly variable and could not be adequately described by a single mathematical function. the area below the curve was therefore determined by means of an area meter. this procedure gave the integral of turgor fro ... | 1986 | 24233732 |
| the structure and genetic control of a new class of disulphide-linked proteins in wheat endosperm. | sodium dodecyl sulphate-polyacrylamide gel electrophoresis (sds-page) of unreduced total protein extracts from the endosperm of hexaploid wheat revealed three high molecular weight protein bands (triplet bands) in a zone of heavy background streaking. electrophoretic examination of 135 hexaploid cultivars showed at least five different patterns of these triplet bands. nine durum wheat cultivars showed a single band only. analysis of nullisomic-tetrasomic and ditelocentric lines of 'chinese sprin ... | 1985 | 24247343 |
| biosynthesis and degradation of a wheat embryo cytokinin-binding protein during embryogenesis and germination. | the accumulation and degradation of a wheat (triticum durum) embryo cytokinin-binding protein (cbf-1) was followed during embryo development and germination by its n(6)-benzyladenine (ba) binding activity and immunological reactivity (rocket immunoelectrophoresis and western blotting). both ba binding activity and cbf-1 appeared at 2 weeks post-anthesis and rose sharply between 2 to 4 weeks before leveling off to approximately 47 micrograms per embryo (9% of the soluble embryo protein at maturit ... | 1985 | 16664477 |
| chromosomal control of glutenin subunits in aneuploid lines of wheat: analysis by reversed-phase high-performance liquid chromatography. | glutenin subunits from nullisomic-tetrasomic and ditelocentric lines of the hexaploid wheat variety 'chinese spring' (cs) and from substitution lines of the durum wheat variety 'langdon' were fractionated by reversed-phase high-performance liquid chromatography (rp-hplc) at 70 °c using a gradient of acetonitrile in the presence of 0.1% trifluoroacetic acid. nineteen subunits were detected in cs. the presence and amounts of four early-eluted subunits were found, through aneuploid analysis, to be ... | 1985 | 24253118 |
| genetic interactions between wheat and rye genomes in triticale : 2. morphological and yield characters. | six primary triticale lines were produced from two advanced breeding lines of triticum durum and three inbred genotypes of secale cereale. the wheat and rye parents as well as the triticale derivatives were then crossed each within the same group of species in all possible combinations. parents, f1s, and f2 populations were used to study the inheritance of a set of morphological and yield characters. the results suggest that, in general, in triticale allelic interactions within the wheat and the ... | 1985 | 24253016 |
| genetic interactions between wheat and rye genomes in triticale : 1. cytological results. | six primary triticale lines were produced from two advanced breeding lines of triticum durum and three inbred genotypes of secale cereale. the wheat and rye parents and the triticale derivatives were crossed in all possible combinations within each species group. chiasma and univalent frequency of parents and hybrids were determined. the primary triticale lines had more univalents and less chiasmata per pollen mother cell than the corresponding wheat and rye parents together. the parental wheat ... | 1985 | 24253015 |
| [analysis of whole gliadin from untreated and heat-treated flour with phase inversion high pressure liquid chromatography]. | the gliadins from various wheat flours either untreated or heated (baking, cooking, roller-drying, extrusion-cooking) were extracted with 70% ethanol and analysed by rp-hplc. when flours are heated below 80 degrees c the chromatograms showed no significant change. at temperatures about 80-90 degrees c a peak appeared in all samples (with the exception of durum wheat) at a retention time of 35 min (peak 35) or, if already present, become more pronounced. a further increase in temperature or treat ... | 1985 | 4024746 |
| energy minimization for tertiary structure prediction of homologous proteins: alpha 1-purothionin and viscotoxin a3 models from crambin. | homologous proteins may fold into similar three-dimensional structures. spectroscopic evidence suggests this is true for the cereal grain thionins, the mistletoe toxins, and for crambin, three classes of plant proteins. we have combined primary sequence homology and energy minimization to predict the structures alpha 1-purothionin (from durum wheat) and viscotoxin a3 (from viscum album, european mistletoe) from the high resolution (0.945 a) crystal structure of crambin (from crambe abyssinica). ... | 1985 | 3917120 |
| effect of light and gibberellic acid on coleoptile and first-foliage-leaf growth in durum wheat (triticum durum desf.). | a comparison has been made of the relative effectiveness of light quality and quantity and gibberellic acid (ga3) treatment on the elongation growth of the coleoptile and the first foliage leaf in durum wheat (triticum durum desf. cvs. cappelli and creso). the cultivar creso is a shortstrawed variety carrying the gai 1 gene on chromosome 4a, which influences both plant height and insensitivity to applied gibberellins. the main conclusions are as follows: 1) coleoptile elongation growth appears t ... | 1984 | 24258578 |
| evidence for wheat-rye nucleolar competition (amphiplasty) in triticale by silver-staining procedure. | amphiplasty in hexaploid triticale, the artificial amphiploid of tetraploid wheat and diploid rye, is analyzed for the first time using a modified, highly reproducible, silver-staining procedure. a comparative analysis of metaphase somatic cells by phase contrast, c-banding and silver-staining of the hexaploid triticale cv. 'cachirulo' and its parents, namely, the tetraploid durum wheat cv. 'enano de andujar' and the diploid rye cv. 'petkus' has been made. two silver-stained nucleolar organizer ... | 1984 | 24258550 |
| two-dimensional analysis of gliadin proteins associated with quality in durum wheat: chromosomal location of genes for their synthesis. | two-dimensional electrophoresis was used to fractionate the gliadin proteins from the endosperm of durum wheat. the increased resolution of the system, as compared with single-dimensional analysis, accentuated the heterogeneity of the proteins. this resolution, coupled with the use of aneuploid lines of the cultivar 'langdon', permitted identification of the chromosomes controlling synthesis of the major protein components. homoeologous group 1 chromosomes controlled omega- and gamma-gliadin syn ... | 1983 | 24263930 |
| photosynthesis, ribulose-1,5-bisphosphate carboxylase, electron transport, and ribulose 1,5-bisphosphate of virescent and normal green wheat leaves. | co(2) gas exchange, ribulose-1,5-bisphosphate, and electron transport have been measured in leaves of a yellow-green mutant of wheat (triticum durum var cappelli) and its wild type strain grown in the field. all these parameters, expressed on leaf area basis, were similar in both genotypes except electron transport which was more than double in the wild type. these results, treated according to a recent photosynthesis model for c(3) plants, seem to indicate that the electron transport rate of mu ... | 1983 | 16663175 |
| morphology and chromosome pairing of a hybrid between triticum durum desf. and haynaldia villosa (l.) schur. | intergeneric hybrids between t. durum desf. (2n = 4x = 28, aabb) and haynaldia villosa (l.) schur. (2n = 2x = 14, vv) was obtained at a frequency of about 5.6% of pollinated florets. phenotypically the f1 plants resemble more the maternal parent than the h. villosa and are almost completely sterile. however, some seeds were obtained on selfed and backcrossed heads with the durum wheat parent. the hybrid had a somatic complement of 2n = 3x = 21, abv, with a mean chromosomal relationship of 13.62 ... | 1983 | 24265082 |
| two nad-dependent alcohol dehydrogenases (e.c. 1.1.1.1) in callus cultures of wheat, rye and triticale. | two nad-dependent alcohol dehydrogenases adh-1 and adh-2, under independent genetic control of genes designated as adh-1 and adh-2 located on chromosomes 4a, 4b and 4d, have been reported in aestivum wheat (hart 1980). only adh-1 is expressed in developing seeds, dry seeds, pollen and germinating seedlings. adh-2 can be induced in seedling roots or shoots under conditions of partial anaerobiosis or by certain chemicals. expression of adh-1 and adh-2 isoenzymes was investigated in undifferentiate ... | 1982 | 24270533 |
| in vitro proliferation of lymphocytes from celiac children and their first-degree relatives in response to wheat gliadin-derived peptides. | evidence is accumulating which indicates that immune reactions to gliadins are involved in the pathogenesis of celiac disease, as humoral- and cell-mediated immune responses to gliadins have been demonstrated in the jejunal mucosa and the peripheral blood of patients. an abnormal specific immunological response to gliadins is demonstrated not only in celiac children but also in their first-degree relatives. seventy-eight percent of celiac patients, and 67, 87, and 100% of their fathers, siblings ... | 1982 | 7186066 |
| pulmonary reaction to durum wheat; a constituent of grain dust. | to identify constituents of grain dust responsible for grain handlers' respiratory symptoms, 11 volunteer grain elevator workers underwent inhalation provocation tests with extracts of durum wheat, durum wheat airborne dust, and grain insects and mites. factors that might influence the host response to the challenge were assessed. five of the 11 subjects showed a greater than 20 percent decrement in fev1 after inhalation of durum wheat extracts (airways reaction). the bronchial reactions were im ... | 1982 | 6797794 |
| cyanide-insensitive and cyanide-sensitive o(2) uptake in wheat: ii. gradient-purified mitochondria lack cyanide-insensitive respiration. | enriched mitochondrial fractions isolated from durum wheat seedlings via differential centrifugation exhibited classical cyanide- or antimycin a-insensitive o(2) uptake which was inhibited by either salicylhydroxamic acid or propyl gallate. further purification of this fraction using percoll density gradients resulted in two discrete bands which were essentially homogeneous mitochondrial populations, as verified by electron microscopy. respiratory o(2) uptake in these two fractions was completel ... | 1981 | 16661720 |
| cyanide-insensitive and cyanide-sensitive o(2) uptake in wheat: i. gradient-purified mitochondria. | the mitochondrial fraction isolated from durum wheat seedlings by differential centrifugation demonstrated antimycin a- or cyanide-insensitive o(2) uptake. further purification of this initial mitochondrial pellet using a linear percoll (pharmacia) density gradient separated the mitochondria into two bands of physiologically distinct activity. based on the usual mitochondrial respiratory criteria of adp/o and respiratory control values, these fractions were qualitatively similar to the crude pel ... | 1980 | 16661461 |
| relationship between durum wheat protein properties and pasta dough rheology and spaghetti cooking quality. | | 2010 | 7462516 |
| succinic semialdehyde dehydrogenase of wheat grain. | succinic semialdehyde dehydrogenase (ec 1.2.1.16) was purified 74-fold from wheat grain (triticum durum desf.). the enzyme appears quite specific for succinic semialdehyde (ssa). both nad and nadp support the oxidation of the substrate, but the former is 7-fold more active than the latter. the optimum ph for activity is around 9; the enzyme is stable in the ph range 6-9 and retains its whole activity up to 40°c. the enzyme activity is strongly dependent on the presence of mercaptoethanol, other ... | 1978 | 24408099 |
| remote-sensing of crop yields. | our research efforts with durum wheat have led to the development of the sdd concept. its application makes possible crop yield estimates from remotely acquired canopy temperatures and auxiliary air temperature measurements obtained during the period from head emergence to the cessation of head growth. canopy albedo measurements appear adequate to delineate this critical period, making the technique potentially adaptable to predictions of crop yields by remote-sensing. the trifactor nomograms pr ... | 1977 | 17733505 |
| intrachromosomal distribution of chromatid aberrations induced by n-methyl-n-nitrosourethane in triticum durum desf. | | 1977 | 854044 |
| on the location of glutamate decarboxylase in the caryopsis of hard wheat (triticum durum) and its activity during early germination. | | 1975 | 1112313 |
| utilization of f1 monosomics for genetic analyses involving awn expression, glume color, seed setting, and seed abortion in crosses of tetraploid and hexaploid wheats. | f1 plants, monosomic for chromosomes 1a to 7b, from crosses of three lines of triticum durum var. khapli with the chinese series were investigated together with their backcrosses to normal chinese spring. the three khapli lines were designated k1-a, k1-b, and k1-d. five parameters were analyzed: awn development, glume color, degree of selfing, crossing ability, and seed abortion.morphological examination of f1 monopentaploid plants revealed that, in the three lines, chromosomes 5a, 1b, 3b, 4b, 5 ... | 1975 | 24419600 |
| [influence of the degree of nonvitreousness on durum wheat semolina characteristics (author's transl)]. | the presence of nonvitreous kernels in durum wheat adversely influences milling yield, protein content and pasta manufacturing quality of semolina. from the results obtained, we can infer that the proportion of these negative effects is related to the degree of nonvitreousness exhibited by the kernels. consequently, to define nonvitreousness and to establish proper methods for its determination, we have to take into consideration not only the percent of nonvitreous kernels but also the degree of ... | 2008 | 1243933 |
| [variability in the fertility of pollen from m2 mutants of spring durum wheat]. | | 2013 | 1145741 |
| [purification and characterization of two peroxidases from hard wheat]. | two peroxidases a and b were purified from a borate buffer extract (ph = 10,4) of durum wheat semolina (triticum durum), var. bidi 17, by chromatography on deae-cellulose, salting out by 3m ammonium sulphate and two chromatographies on cm-cellulose; specific activities of peroxidase a or b were increased 114 or 66 fold. molecular weight, amino acid composition, absorption spectrum, ph optimum, thermal stability and km values differentiate the two enzymes. ion ca++ was shown as an activator of bo ... | 1975 | 237578 |
| [the effect of several chemical mutagens on chromosomal transformations and growth processes in durum wheat]. | | 2013 | 4467364 |
| breeding possibilities offered by induced mutations in durum wheat. | a report on the use of mutations of agronomic value obtained in durum wheat in an accelerated crossing programme is given. the mutated characters used were isolated in cv. cappelli and russello, related respectively to a dominant short straw and a dominant earliness factor. besides these two mutant lines, 4 other varieties were used, 80/57, yuma, ld 357 and kyperounda, representative of cultivated types of quite different origin. the program started in december 1965 and progressed till june 1970 ... | 1974 | 24424516 |
| multivariate statistical analysis of grain yield and agronomic characters in durum wheat. | correlation, stepwise multiple regression and factor analyses were conducted on grain yield and a number of agronomic characters in the parental, f 1 and f 2 families originating from a 10 x 10 diallel cross in durum wheat. for the f 1 diallel, the correlation analysis indicated that the number of spikes and kernels per plant and 1,000 kernel weight had the highest correlations with grain yield; for the f 2 diallel, the number of spikes and kernels per meter, 1000 kernel weight and plant height ... | 1973 | 24425074 |
| survival and chlorophyll mutation in triticum durum plants raised from aged seeds. | | 1972 | 5059252 |
| sequential development of meristems in the embryo of triticum durum. a dna autoradiographic and cytophotometric analysis. | | 1969 | 5355606 |
| changes in enzyme levels during germination of seeds of triticum durum. | the changes in level of activity during the germination of wheat seedling (triticum durum) in the dark have been investigated with 4 enzymes of glycolysis, 2 enzymes of the pentose phosphate shunt, 2 of the tricarboxylic acid cycle, 2 of amino acid metabolism and acid phosphatase. for some enzymes, which function in photosynthesis (fructose diphosphate aldolase, glyceraldehyde phosphate dehydrogenase nadp dependent), the level of activity was influenced by the presence of light. | 1968 | 16656761 |
| radiation response of dry seeds in two varieties of triticum durum. | | 1966 | 5972695 |
| geotropic response of wheat coleoptiles in absence of amyloplast starch. | young coleoptiles of wheat (triticum durum var. henry), depleted of amyloplast starch by incubation at 30 degrees c with gibberellin plus kinetin, retained their geotropic responsiveness. depleted coleoptiles curved upward more slowly than controls, but this was commensurate with their slower growth. the ratio of curvature to growth was about 50 degrees per mm of elongation in both cases. newly excised coleoptiles, though containing much more starch than incubated controls, curved only about 25 ... | 1966 | 5961354 |
| wheat: reconstitution of the tetraploid component (aabb) of hexaploids. | the tetraploid aabb genomic component of two varieties of common hexaploid wheat (aabbdd; 2n = 42) was reconstituted by a simple back-crossing technique in which known phylogenetic relationships between the hexaploid and tetraploid groups of triticum were used. the reconstituted tetraploids do not closely resemble commonly described varieties of the present-day group of tetraploid species. the plants are dwarfed, lack vigor, and are partially or completely self-sterile, depending on the variety ... | 1964 | 17753152 |
| [devernalization and tenderization in triticum durum, desf. in relation to the assumption of spherical texture by the starch granules]. | | 1960 | 13717755 |
| an analysis of seedling mutants (spontaneous, atomic bomb-radiation-, and x ray-induced) in barley and durum wheat. | | 1951 | 17247367 |