Pollution Research Paper

Vol.20, Issue 01, 2001; Page No.(135-138)

PHYSIOLOGICAL AND BIOCHEMICAL TOLERANCE IN MOTH BEAN TO HEAVY METAL STRESS

SUDHA R. MATHUR, R. GANESH AND K. K. BORA

Abstract

The effects of cad imium (Cd) and lead (Pb) on extent of membrane damage in moth bean seedlings of ey. 1010-40 by measuring the malondialdehyde (MDA) content and the activities of some enzymes of activated oxygen metabolism was studied. It was observed that both the heavy metals brought a drastic reduction in root, hypocotyl and shoot (epicotyl) lengths in this cultivar over the control. The magnitude of effect of Cd was more than that of Pb; the root growth being more sensitive than shoot growth. MDA accumulation was higher under heavy metal stress, to the tune of 30 percent in Cd and 19 percent in Pb - treated seeding. Amongst the enzyme activities recored, superoxide dismutase (SOD) showed little changes in response to either cd or Ph treatment. There was a significant increase in cataiase (CAT) activity, the increase 'win higher under influence of Cd than that of Ph. No significant changes in activities of peroxidase (PO), ascorbic acid oxidase (AAO), Protease (PRO) and acid phosphatase (Al') were found in either treatments.

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