01420naa a2200217 a 450000100080000000500110000800800410001910000180006024502060007826000060028452007050029065000170099565300190101265300190103165300250105065300100107570000190108570000190110470000190112377300600114216481981999-06-08               bl ---       0--  u    #d1 aDURLEY, R. C.  aDrought resistance of Sorghum bicolor. 5. genotypic differences in the concentrations of free and conjugated abscisic, phaseic and indole-3-acetic acids in leaves of field-grown drought-stressed plants  c0  aConcentrations of free and conjugated abscisie acid (AbA), phaseic acid (PA) and indole-3-acetic acid (IAA) were measured in leaves of sorghum (Sorghum bicolor (L.) Moench) genotypes grown in the field. Hormone levels were compared and related to grain yield stability under drought, expressed as the percentage reduction in grain yield (percent RGY) of drought-stressed compared to irrigated plants. Although hormone concentrations were similar in irrigated plants, there was considerable genotypic variation in drought-stressed plants. In a four genotype comparison during the panicle initiation stage, mean leaf AbA concentrations in drought-stressed plants were positively related to percent RGY.  aphaseic acid  aAbbscisic acid  aDrought stress  aIndole-3-acetic acid  aYield1 aKANNANGARA, T.1 aSEETHARAMA, N.1 aSIMPSON, G. M.  tCanadian Journal of Plant Sciencegv.63, p.131-145, 183