Abstract Growth is accomplished through cell division, cell enlargement and differentiation, and involves genetic, physiological, ecological and morphological events and their complex interactions. The quality and quantity of plant growth depend on these events, which are affected by water deficit. Cell growth is one of the most drought-sensitive physiological processes due to the reduction in turgor pressure. Under severe water deficiency, cell elongation of higher plants can be inhibited by interruption of water flow from the xylem to the surrounding elongating cells. Severe water deficit stress restricts the photosynthesis by damaging the chlorophyll components (CC) and changing the photosynthetic machinery. Decreased photosynthetic amount under water deficit condition is an outcome of Inhibition of Rubisco enzyme activity and development of ATP. Proline is well known to occur extensively in higher crop plants and accumulates in higher concentration in response to different abiotic environmental stresses specially drought stress. Different types of plant physiological responses have been reported by various Plant physiologists in their findings under drought stress situation.
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