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Response of some Calvin cycle enzymes subjected to salinity shock in vitro
C Sudhakar1, S Ramanjulu, P S Reddy
1Department of Botany, Sri Krishnadevaraya University, Anantapur, India.
Indian Journal of Experimental Biology
|June 1, 1997
Abstract:
Leaf enzyme extracts of 10 day old seedlings of horsegram were subjected to NaCl or Na2SO4 treatment in vitro. Salinity shock caused decline in the activities of RuBP carboxylase, R-5-P kinase, R-5-P isomerase and NADP-Gly-3-P dehydrogenase. At low concentrations, Na2SO4 did not alter the activities of R-5-P kinase, R-5-P isomerase and NADP-Gly-3-P dehydrogenase. RuBP carboxylase was found to be more sensitive to salt shock than the other enzymes studied. Further, NaCl was more toxic to the enzyme activities as compared to Na2SO4.