Drought stress affects plant growth and overall yield. Following drought, stomata close resulting in a decline in net photosynthesis. Stomatal conductance is controlled by the availability of soil moisture and the complex interaction of intrinsic and extrinsic factors. Depending on the severity of the drought, the activities of enzymes involved in carbon assimilation and adenosine triphosphate synthesis decrease and sometimes are even inhibited. The main factor reducing plant growth and productivity under drought conditions is the production of reactive oxygen species in organelles including chloroplasts, mitochondria and peroxisomes. Reactive oxygen species target the peroxidation of cell membrane lipids and the degradation of enzymatic and nucleic proteins
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