Amelioration of Cd++ Toxicity by Ca++ on Germination, Growth and Changes in Anti-Oxidant and Nitrogen Assimilation Enzymes in Mungbean(Vigna mungo) Seedlings
2004
Kochhar, Sunita (National Botanical Research Institute, Lucknow, India) | Ahmad, Gayas (National Botanical Research Institute, Lucknow, India) | Kochhar, Vinod Kumar (National Botanical Research Institute, Lucknow, India), E-mail: [email protected]
The present study describes the ameliorating effect of Ca++ on Cd++ toxicity on the germination, early growth of mungbean seedlings, nitrogen assimilation enzyme. s-nitrate reductase (NR), nitrite reductase (NIR), antioxidant enzymes (POD, CAT and SOD) and on the accumulation of hydrogen peroxide and sulphydryls. Cd++ inhibited seed germination and root and shoot length of seedlings. While NR activity was down- regulated, the activities of NIR, POD and SOD were up- regulated with Cd++ treatment. Cd++ treatment also increased the accumulation of sulphydryls and peroxides, which is reflective of increased thiol rich proteins and oxidative stress.
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