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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 ...
... Application of abscisic acid (ABA) to dark-grown wheat (Triticum aestivum L.) roots interfered the cell wall hardening of coleoptiles during several days of the treatment. Although the mounts of wall-bound diferulic (DFA) and ferulic (FA) acids in coleoptiles increased as the coleoptiles grew, ABA substantially reduced their increases. When ABA was removed, however, these contents increased and re ...
... 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 ...
... Suspension-cultured cells derived from immature embryos of winter wheat (Triticum aestivum L. cv. Chihoku) were used in experiments designed to obtain clues to the mechanism of the ABA-induced development of freezing tolerance. Cultured cells treated with 50 micromolar ABA for 5 d at 23 degrees C acquired the maximum level of freezing tolerance (LT50; -21.6 degrees C). The increased freezing toler ...
... We investigated the role of actin microfilaments in nonhost resistance of higher plants. Here we present several lines of evidence to indicate that microfilaments are indeed involved in blocking fungal penetration of nonhost plants. Erysiphe pisi, a pathogen of pea, normally fails to penetrate into nonhost plants such as barley, wheat, cucumber and tobacco. When tissues of these nonhost plants wer ...
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 ...
... Incorporation of 35S into protein is reduced by exposure to Al in wheat (Triticum aestivum), but the effects are genotype-specific. Exposure to 10 to 75 micromolars Al had little effect on 35S incorporation into total protein, nuclear and mitochondrial protein, microsomal protein, and cytosolic protein in the Al-resistant cultivar PT741. In contrast, 10 micromolars Al reduced incorporation by 21 t ...
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 ...
protoplasts; ion transport; chlorides; metal tolerance; anions; Triticum aestivum; aluminum; electric current; plasma membrane; metal ions; roots; membrane potential; plant proteins
Abstract:
... We describe an anion channel in the plasmalemma of protoplasts isolated from wheat (Triticum aestivum L.) roots that is activated by aluminum (Al(3+)). In the whole-cell configuration, addition of 20-50 micromolar AlCl3 to the external solution depolarized the membrane and activated an inward current that could remain active for more than 60 min. The activation by Al(3+) was rapid in 20% of protop ...
... 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 ...