Agriculture plays a vital role in the Indian economy. Over 70 percent of the rural households depend on agriculture. Though India is one among the largest producers of most of the agricultural crops, but its rank is extremely low in terms of productivity. In addition to it, many types of environmental stresses both biotic and abiotic affect the plants and produce characteristic changes in its physiology and metabolic processes. | Plant viruses A causative agent for biochemical and physiological alteration in plants
