PJB-2007-290
PHYSIOLOGICAL RESPONSES OF WHEAT (TRITICUM AESTIVUM L.) GENOTYPES UNDER WATER STRESS CONDITIONS AT SEEDLING STAGE
S.M. MUJTABA, MUHAMMAD ALI, M.Y. ASHRAF, B. KHANZADA, S.M. FARHAN, M.U. SHIRAZI, M.A. KHAN, A. SHEREEN AND S. MUMTAZ
Abstract
Twelve wheat genotypes/lines were tested for different levels, 0.00 (control), -0.5 and -0.75 MPa of osmotic stresses (PEG-6000) for 20 days in a growth cabinet under a 10 h photoperiod (41.69 mmol m-2 s-1) to study growth and physiological attributes including nitrate reductase activity (NRA), proline and potassium contents. It was observed that root and shoot length, NRA and potassium (K+) contents decreased however the proline contents increased by the imposition of osmotic stress. Comparatively less reduction in all these attributes and ion contents was observed in tolerant genotypes.
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