12. ORDIN, L., R. CLELAND, AND J. BONNER. 1957. Methyl esterification of cell wall constituents under the influence of auxin. Plant Physiol. 32: 216-20. 13. RAY, P. M. 1962. Cell wall synthesis and cell elongation in oat coleoptile tissue. Am. J. Botany 49: 928-39. 14. RAY, P. M. 1963. Sugar composition of oat coleoptile cell walls. Biochem. J. 89: 144-50. 1 S. RAY, P. M. AND D. B. BAKER. 1962....

Early fertilizer nitrogen (N) application on cover crops or their residues during the off-season is a practice adopted in Brazil subtropical conditions under no-tillage corn (Zea mays L.) systems. However, the effect of early N application on yield, plant N content, and N recovery efficiency (NRE) for corn is not yet well documented. Five fertilizer N timings in an oat-corn system were evaluate...

introduction integrated weed management is based on combination of several management methods, while reducing the rate of the use of herbicides, will result in efficient management and sustainable weed control. ability of crop tolerance and prevent weed growth are two important traits in weed competition. an appropriate and suitable cultivar, has high yield potential in the presence of weed and...

Viral determinants involved in systemic infection of hosts by monocot-infecting plant viruses are poorly understood. Wheat streak mosaic virus (WSMV, genus Tritimovirus, family Potyviridae) exclusively infects monocotyledonous crops such as wheat, oat, barley, maize, triticale, and rye. Previously, we reported that WSMV CP amino acids 36-84 are expendable for systemic infection of wheat, maize,...

nant dwarfing gene, Dw8, was identified and demonstrated to be distinct genetically from Dw6 and Dw7 The use of oat (Avena sativa L.) dwarfing genes in breeding pro(Milach et al., 1998). This gene has not been used yet grams to improve lodging resistance has been limited, mainly because of decreases in yield and grain quality in many environments. The for cultivar development. objectives of thi...

in order to study the tolerance level of different wild barley (hordeum spontaneum) populations to clodinafop propargyl (topic®), a pot dose response experiment was conducted in a completely randomized design with three replications at ferdowsi university of mashhad greenhouse in 2009. cultivared barley (hordeum vulgare) and three wild barley populations (shiraz, boshroyeh, and torogh) were stu...

Plant growth regulators (PGRs) are exogenously applied chemicals that alter plant metabolism, cell division, cell enlargement, growth and development by regulating plant hormones or other biological signals. For example, some PGRs regulate stem elongation by inhibiting biosynthesis of gibberellins or through releasing ethylene. PGR effects are widely studied and reported on barley (Hordeum vulg...

To determine the functional homology between phytochromes from evolutionarily divergent species, we used the cauliflower mosaic virus 35S promoter to express a monocot (oat) phytochrome cDNA in a dicot plant (tomato). Immunoblot analysis shows that more than 50% of the transgenic tomato plants synthesize the full-length oat phytochrome polypeptide. Moreover, leaves of light-grown transgenic pla...

The responses of the vacuolar membrane (tonoplast) proton-pumping inorganic pyrophosphatase (H(+)-PPase) from oat (Avena sativa L.) roots to changes in Mg(2+) and pyrophosphate (PPi) concentrations have been characterized. The kinetics were complex, and reaction kinetic models were used to determine which of the various PPi complexes were responsible for the observed responses. The results indi...

The execution of programmed cell death (PCD) involves the controlled degradation of cellular macromolecules such as proteins and nucleic acids. Compared with animal systems, very little is known about the molecular mechanisms regulating macromolecule degradation during plant PCD. Victorin, a host-selective toxin produced by the fungus Cochliobolus victoriae, induces PCD in oat cultivars harbori...