HomeInternational Rice Research Notesvol. 24 no. 2 (1999)

Biochemical Studies on Rice Seedlings under Salt Stress

M. P. Mandal | R A. Singh | J. K. Handoo

Discipline: Agriculture, Water Management



We estimated the amylase, peroxidase, and protease enzyme activity in four rice genotypes that have different degrees of salt tolerance. Pusa 2-21 and Saket 4 are salt-tolerant and Kamini and Sugandha are susceptible varieties. The enzymes were studied because salinity effects on seedling growth have been attributed to variation in activities of key hydrolytic enzymes such as L-amylase and protease (Dubey 1982, Kumar et al 1996). Similarly, peroxidase activity is related to the maintenance of cell membrane integrity through its involvement in detoxifying H2O2 to water (Levitt 1980), thus modifying the effect of free radicals under stress.