Author(s):

J Rameshkumar and PS Saravanan

Abstract: Chromium is one of the major environmental stresses that affect plant growth and their toxic level in soils are result of heavy traffic, mining, industrials and agricultural activity. Chromium first accumulates in soil to reach the plant through roots. The chromium present at trace level in fertilizers may accumulate in agricultural soils and pose a hazard to plant growth and yield. In this way present study aimed at the effects of chromium accumulation in groundnut with special reference to various morphological and biochemical analysis done. Pot culture experiment were conducted with groundnut crop, growth in the soil mixed various amount of chromium concentrations of chromium, namely 50, 100, 150, 200 and 250 mg kg^-1. The inner surface of pots were lined with a polythene sheets. Each pot contained 5kg of ash dried soils. Uniform irrigation was done once in a week for the entire period of experiment. The soil without chromium is treated as control. The morphological parameters like shoot length, root length, fresh and dry weight, total leaf area and biochemical content such as starch, proline, sugar and protin of groundnut plant were analyzed on various sampling days (30,60and 90 days). The biochemical content (except 50mg kg^-1) decreased with increase of concentrations of chromium. The present investigation it was concluded that the 50mg kg^-1 level of chromium in the soil was beneficial for the growth of <em>G. hypogea </em>plants.

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