Pak. J. Bot., 27(1): 165-168, 1995.

Back to Contents	Pak. J. Bot., 27(1): 165-168, 1995.	FREE FULL TEXT PDF	Back to Contents
			Updated: 23-12-10
	*HARDENING POTENTIAL IN COTTON (GOSSYPIUM HIRSUTUM* L.) AT HIGH TEMPERATURE STRESS** M.A. SETHAR, D.L. LAIDMAN, J.M. WILSON AND R.B.MIRBAHAR Abstract: Leaves of cotton cultivar 5-12 were acclimated at temperatures ranging from 35 to 44°C for different lime periods followed by heat stress at 45 or 46°C. The heat acclimation potential was analyzed by Chlorophyll Fluorescence technique. The recovery of F_v / F_m ratio after application of heat stress was the paramev mler for detennination of the acclimation potential. Very small fluorescence (F_v / F_m ) values were recorded after heat stress at 46°C with fairly good response when acclimated leaves were heat stressed at 4S°C. Department of Physiology and Biochemistry, Sindh Agriculture University Tandojam, Pakistan. * School of Biological Sciences, University of Wales, Bangor, UK.

Back to Contents			Back to Contents