ABSTRACT
Abiotic stressful conditions of the environment such as soil salinity, drought, flood, heat, cold, anaerobiosis, gaseous pollutants, radiation, and high levels of metals in the soil are major constraints to global crop productivity. Extremes of these conditions cause alterations in a wide range of physiological, biochemical, and molecular processes in plants, affecting growth and metabolism of plants and ultimately leading to decrease in crop yield. To achieve sustainability in food grain production, in order to feed growing population, it is essential to ensure yield stability in stress-prone environments.
