Vol. 3, Issue 1 (2018)
Effect of zinc stress on antioxidant defense system of finger millet
Author(s): Manan Ji Gonr, Malvika Srivastava
Abstract: Zinc is an essential micronutrient in plants which is involved in protein synthesis, RNA metabolism and DNA formation, but high concentration of Zn has adverse effect on the growth and metabolism of plants. In the present work finger millet (VL-147 variety) were treated with different concentration 100mM, 200mM, and 300mM of ZnSO4. The germinated seeds of VL-147 variety were grown in the pots containing sand and supplied with Hoagland nutrient solution. Untreated plants were kept as control. Under zinc stress condition with increase in concentration and age of plants the activities of antioxidant enzymes catalase and peroxidase increased significantly as compared to control plant. Decrease proline accumulation under Zn stress condition was observed as compared to control plant. Membrane Stability Index and Yield parameter decreased with increasing ZnSO4 concentration but 100mM ZnSO4 concentration increased yield parameter.