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... We report here the synthesis and biological activity of a new persistent abscisic acid (ABA) analog, 8'-methylene ABA. This ABA analog has one additional carbon atom attached through a double bond to the 8'-carbon of the ABA molecule. (+)-8'-Methylene ABA is more active than the natural hormone (+)-ABA in inhibiting germination of cress seed and excised wheat embryos, in reducing growth of suspens ...
cultivars; Amblyopyrum muticum; amplified fragment length polymorphism; seeds; DNA methylation; genetic polymorphism; DNA; Aegilops speltoides; Triticum aestivum; leaves; spatial variation; DNA fingerprinting; wild relatives; roots; genetic markers; shoots
Abstract:
... AFLP (amplified fragment length polymorphism) fingerprinting of cultivars of bread wheat (Triticum aestivum) and some of its wild relatives has allowed the efficient detection of large numbers of polymorphic amplified fragments. While the reproducibility of fingerprints in repeated experiments is high, pattern differences were observed between fingerprints obtained from seed and leaf DNA template ...
... Information is lacking on N accumulation in soft red winter wheat (Triticum aestivum L.) and the fate of residual fertilizer N in soil. The objectives of this study were to determine the uptake and redistribution of fertilizer and total N within the wheat plant as well as the amount and distribution of fertilizer N in the soil profile at wheat maturation. Urea-¹⁵N was applied at the rate of 112 kg ...
Parastagonospora nodorum; fungal diseases of plants; host-parasite relationships; strain differences; Triticum aestivum; virulence; North Dakota; South Dakota; Montana
Abstract:
... Isolates of Stagonospora nodorum, obtained from diseased wheat leaves collected in fields in Montana, North Dakota, and South Dakota, were tested on detached seedling leaves of wheat and found to be pathogenic. Differences among isolates chosen at random were detected in the first phase of the inoculations. Isolates associated with severe and mild symptom severity, as measured by lesion size, were ...
... Previous studies have identified wheat (Triticum aestivum L.) chromosome substitution lines between ‘Cheyenne’ (CNN) and ‘Wichita’ (WI) that contain quantitative trait loci (QTLs) affecting yield and yield components, anthesis date, plant height, and grain volume weight. However, chromosome substitution lines can only identify additive or epistatic gene action. In this study, hybrids between CNN a ...
... Comparisons of bread wheat (Triticum aestivum L.) germplasms provided evidence that the T1BL.1RS chromosome substitution enhances agronomic performance and, particularly, grain yield. There are no known reports of the effect of this translocation in durum wheat (Triticum turgidum L.), however. The objective of this study was to determine the effect of the T1BL.1RS chromosome on grain yield, yield ...
backcrossing; crop quality; alleles; intergeneric hybridization; height; agronomic traits; crop yield; baking quality; Triticum aestivum; Aegilops; protein content; selection criteria; North Carolina; Virginia
Abstract:
... Aegilops tauschii Coss., a diploid progenitor of common wheat, Triticum aestivum L., is a valuable source of pest resistance alleles. However, interspecific populations generated for pest-resistant germplasm development may contain beneficial alleles for other important traits. The objective of this research was to evaluate eight agronomic and grain quality traits in three soft red winter wheat × ...
... Studies of Al partitioning and accumulation and of the effect of Al on the growth of intact wheat (Triticum aestivum L.) roots of cultivars that show differential Al sensitivity were conducted. The effects of various Al concentrations on root growth and Al accumulation inthe tissue were followed for 24 h. At low external Al concentrations, Al accumulation in the root tips was low and root growth w ...
cultivars; glutenins; protein composition; loci; alleles; soft white wheat; gliadin; hard white wheat; durum wheat; endosperm; Triticum aestivum; United States
Triticum aestivum; aluminum; metal ions; chemical speciation; roots; cell walls; cultivars; metal tolerance; acidity; polymers
Abstract:
... Hydrolysis of Al3+ was performed in the presence of isolated root cell walls from a series of wheat cultivars (Triticum aestivum L.) known to have differential tolerance to Al contamination. Aluminium speciation was dependent on the cell wall concentration. At low cell wall concentrations, significant amounts of the very toxic Al13 species were formed. At higher cell wall concentrations, formation ...
... A micrometeorological mass balance technique was used to determine ammonia (NH₃) volatilization from pig (Sus scrofa) slurry applied to winter wheat (Triticum aestivum Lam). The slurry was applied with trail hoses on the soil below the canopy or by a splash plate technique spreading the slurry on both plants and soil. The two application techniques were compared in parallel experiments of 7 d dura ...
... Tissue analysis of plant material is used to estimate the level of sufficiency of deficiency of any particular nutrient. Published values of ammonium-ammonia reported in plant cell extracts would have been toxic to plants, if these values are really present in the cell. We believe that the ammonia determined in plant tissue is actually ammonium produced by the decomposition of soluble amino compou ...
Rhopalosiphum padi; Sitobion avenae; Schizaphis graminum; Triticum aestivum; population density; mathematical models; Monte Carlo method; economic threshold; North Dakota
Abstract:
... Binomial sequential sampling plans usually are more efficient than sampling plans based on counting the number of insects per sample. Our objective was to develop robust binomial sequential sampling plans based on a range of action thresholds for 3 species of cereal aphids, Rhopalosiphum padi (L), Sitobion avenae (F.). and Schizaphis graminum (Rondani). Aphid population data were collected from 45 ...
... Wheat gluten proteins are largely responsible for the visco-elastic properties that allow doughs to be processed into bread and various other food products including cakes, biscuits (cookies), pasta and noodles. Detailed biochemical and biophysical studies are revealing details of the molecular structures and interactions of the individual gluten proteins, and their roles in determining the functi ...
random amplified polymorphic DNA technique; Diuraphis noxia; Hordeum vulgare; clones; biotypes; varietal resistance; Triticum aestivum; Kansas; Wyoming; Nebraska; Colorado
Abstract:
... Baseline information on the biotypic status of Russian wheat aphid, Diuraphis noxia (Kurdjumov), populations in the United States prior to the commercial planting of Russian wheat aphid-resistant small grains is reported. Ten Russian wheat aphid clones, collected from 5 states, were evaluated for biotypic variation on 4 wheat, Triticum aestivum L., and 2 barley, Hordeum vulgare L., germplasm entri ...
Triticum aestivum; Zea mays; Brassica oleracea var. italica; leaves; stems; xylem; sap; boron; isotopes; quantitative analysis; isotope fractionation; radiolabeling; nutrient requirements; chemical constituents of plants
Abstract:
... Naturally-occurring variations in the abundance of stable isotopes of carbon, nitrogen, oxygen, and other elements in plants have been reported and are now used to understand various physiological processes in plants. Boron (B) isotopic variation in several plant species has been documented, but no determination as to whether plants fractionate the stable isotopes of boron, 11B and 10B, has been m ...