Changes in the biochemical constituents of vigna mungo under zinc exposure

In the present study Vigna mungo plants were raised under different concentrations of zinc (5, 10, 25, 50 & 100 mgl-1). One set of seeds were irrigated with distilled water which served as control (0 mgl-1). Vigna mungo seeds were equispacealy placed in Petri plates lined with filter paper. They were irrigated periodically with various concentrations (5, 10, 25, 50 & 100 mgl-1). Five replicates were maintained for each concentrations including control. The number of seeds germinated were counted and recorded daily. On the 10th day after sowing five seedlings were taken in random to record various seedling growth parameters like shoot length, root length and dry weight of seedlings. The seedlings were used for the analysis of various biochemical constituents like photosynthetic pigments, protein, total sugars and amino acids. There was a gradual decline in all the growth parameters and biochemical constituents with progressive increase in zinc concentration.