|Author:||González, A. ; Ayerbe, L.|
|Book Group Author:||NA|
The effect of drought on barley leaf epicuticular wax load (EWL), residual transpiration rates (RTR) and grain yield was examined by subjecting 12 barley genotypes to controlled irrigation and terminal water stress conditions. The mean leaf epicuticular wax load was found to be 9% greater in the plants subjected to terminal water stress than in those provided irrigation, while the mean residual transpiration rate of the irrigated plants was 20% higher than in those subjected to water stress. Under these stress conditions, the correlation between grain yield and the epicuticular wax load was positive (P<0.01), while that between the grain yield and the residual transpiration rate was negative (P<0.05). Under the water stress conditions, the breeding lines studied showed a greater mean epicuticular wax load than the commercial varieties, while the residual transpiration rate was greater in these varieties than in the breeding lines. The greater epicuticular wax load of the breeding lines favoured their tolerance of drought, improving their yields over those of the commercial varieties.
|Pages:||341 - 349|
barley, crop yield, drought, drought resistance, effects,genotypes, irrigation, plant breeding, plant physiology, stress, stressconditions, tolerance, transpiration, varieties, water stress, yields,Hordeum vulgare, plants, Hordeum, Poaceae, Cyperales, monocotyledons,angiosperms, Spermatophyta, plants, eukaryotes, drought tolerance,watering, Plant Production (FF100), Natural Disasters (PP800),Meteorology and Climate (PP500), Environmental Tolerance of Plants(FF900), Plant Water Relations (FF062), Plant Breeding and Genetics(FF020), Soil Water Management (Irrigation and Drainage) (JJ800)(Revised June 2002) [formerly Soil Water Management], Plant Physiologyand Biochemistry (FF060), Field Crops (FF005) (New March 2000)