Abiotic and Biotic Stress in Plants

Biological changes occurring in plants due to a change in external environmental conditions are referred to as stress. These external changes can trigger a wide array of plant responses such as altered gene expression, as well as changes in growth rates and crop yields. Plant stresses are classified into abiotic and biotic stress. Abiotic stresses cause major loss of crops worldwide. These include drought, floods, salinity and extreme temperatures. Shortage of water and increasing desertifi...