PHYTO TOXIC EFFECT OF COPPER AND CHROMIUM ON SEED GERMINATION PERCENTAGE OF Vigna radiate L.

The present investigation deals with the effect of the copper on the germination of seedling on four groundnut cultivars (Co-6, VRM, Co-7, KM-2 ) of Vigna radiata were procured from Agricultural Office, Walajapet and Tamilnadu Agricultural University, Coimbatore for this study. The seeds of these four cultivars were treated with various concentrations of Copper and chromium solutions (0, 5,10,25,50 and 100).Three replicates were maintained for each concentration. The seeds were treated with distilled water as control separately. Both the treated and controlled seeds were grown in water soaked filter papers kept in petridishes under the room temperature. Seeds were treated regularly with various concentrations of copper sulphate and chromium solution respectively. The germination of seedlings were calculated on 7 th day after sowing. The results obtained from this treatment shows that the copper and chromium decrease the germination of seedlings with increase in concentration. The germination of seedlings increase in 5% than control. While the concentrations increases other than 5% the germination gradually becomes decreases. In the 100% conentration very low germination or absent.The inhibition germination of these four cultivars of Vigna radiata were proportional to the higher concentrations of copper and chromium.