Pak. J. Bot., 33(3): 279-287, 2001. | Back to Contents | ||||
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Updated: 01-12-10 | ||||
WATER RELATIONS IN DIFFERENT GUAR (CYAMOPSIS TETRAGONOLOBA (L.) TAUB) GENOTYPES UNDER WATER STRESS BARKAT KHANZADA, M. YASIN ASHRAF*, S. AHMED ALA**, S.M. ALAM, M.U. SHIRAZI AND R. ANSARI
Abstract: Water relations of four guar genotypes viz., S-807, Esser, Brooks
and S-1183 under different water regimes at pre-flowering, post-flowering
and terminal drought were studied in cemented tanks under natural conditions.
Water deficit reduced yield relative water content (RWC), leaf osmotic
potential (OP), leaf water potential (WP), turgor potential (TP) in
all four guar genotypes used. However, the genotypes S-807 and Esser
had comparatively higher yield RWC, turgor potential under all water
stresses than Brooks and S-1183. Maximum reduction in all parameters
were recorded under terminal drought. The differences between pre- and
post-flowering stresses were non-significant in case of yield and RWC
but significant in other parameters. Genotypes with higher RWC and turgor
potential had higher seed weight.
Plant Physiology Division, Nuclear Institute of Agriculture, Tandojam,
Sindh, Pakistan. |
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