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ELECTROLYTE LEAKAGE IN SEEDS, ROOTS AND LEAVES IOF COTTON AND SOYBEAN AT OPTIMAL AND SUPEROPTIMAL TEMPERATURES

MUMTAZ ALl SETHAR, GHULAM MUSTAFA LUND, VAJANTI MALA, IRFANA PERVEEN BHATTI AND QAMARUDDIN CHACHAR

Abstract: Leaves, roots and seeds of soybean and cotton were subjected to a series of temperature stress of 30, 34,38, 42, 46 and 50°C to measure the ion efflux from the cell. Soybean leaves leaked more electrolytes at 313 µS/cm than cotton leaves which recorded the electrical conductivity of 143 µS/cm at 50°C. Below the stress at 42°C relatively less ions were effluxed as compared to 42°C or above where severe damage to cell membrane occurred and more than 50% electrolytes leaked from leaves, seeds and roots of both crop plants.

Department of Physiology and Biochemistry, Sindh Agriculture University, Tandojam, Sindh, Pakistan.