Effect of terminal water stress on leaf epicuticular wax load,residual transpiration and grain yield in barley |
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| Authors: | A González L Ayerbe |
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| Institution: | 1.Servicio de Investigación Agraria, CAM,Alcalá de Henares,Spain;2.Centro de Recursos Fitogenéticos, INIA,Alcalá de Henares,Spain |
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| Abstract: | 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. |
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