Drought adaptive mechanisms of plants – a review

Abstract

Drought stress is one of serious threats of mankind particularly in arid and semiarid regions, it is the most serious threat to world food security, there are various negative effects on plant growth and total yield occurs under drought conditions, therefore, plants have different responses for adaptation and survive with drought conditions such as morphological, biochemical, physiological responses, and a molecular mechanism. Plants acclimatize with drought stress by use various strategies includes drought escape, drought avoidance and drought tolerance. Plant breeding using biotechnology and classical breeding techniques for improving plant drought tolerance, also, use of Exogenous plant growth regulators improving plant tolerant for drought stress.