Asian Journal of Microbiology, Biotechnology & Environmental Sciences Paper

Vol 11, Issue 1, 2009; Page No.(123-126 )

EFFECT OF CHROMIUM STRESS ON GROWTH AND PHYSIOLOGICAL RESPONSES IN LINSEED (LINLIM LISITATISSIMLIM L) PLANTS

MEENAKSHI AND S. N. PANDEV

Abstract

Linseed (Liman iisitalissoiton L.) plants were grown in Gomti upland alluvial (Sandy - loam) soil and irrigated with graded concentrations of chromium (VI) (0.02, 0.2, 2 and 5 ppm). Marked reduction in growth, dry matter yield, chlorophyll contents (a, b, and total), catalase and amylase activity was observed at high concentrations of Cr supply levels (2 and 5 ppm) in irrigational water The visible symptoms of Cr toxicity appeared on plants were stunted plant growth, and chlorosis and tip burning of leaves. Symptoms were spread from base to top of the plants. Cr supply at it's lower concentrations (0.02 and 0.2 pprn) stimulated growth and metabolic responses in plants. Reduction in dry matter yield (47.7%) and total chlorophyll content (10.53%), was observed at 5 ppm Cr concentration over control. Increase in the activities of enzyme (catalase and amylase) was maximum at 2 ppm Cr and declined by Cr at it's 5 ppm concentration in irrigational water in linseed plants.

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