Effect of some nitrogenous and non-nitrogenous salts on the activity of enzymes of ammonium assimilation in Vigna mungo (L) Hepper.

Effects of different concentrations (1.0, 2.0, 4.5, 10.0, 20.0 mM) each of KCl, K₂SO₄, KH₂PO₄ NH₄NO₃ and NH₄Cl on glutamine synthe tase (GS), glutamate synthase (GOGAT) and glutamate dehydrogenase (GDH) activity in the primary leaves of Vigna mungo were studied. Supply of lower concentrations of KCl, KH₂ PO₄ and K₂ SO₄ to detached leaves, promoted the activity of all the three enzymes. Ammonium chloride and ammonium nitrate had little effect on GS activity, but in creased the activities of GDH and GOGAT at lower concentration.