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MECHANISM OF DROUGHT TOLERANCE IN PLANT AND ITS MANAGEMENT THROUGH DIFFERENT METHODS
Control of drought stress in plant is not only very complex, but is also highly influenced by other environmental factors and by the developmental stage of the plant. Here we review certain physiological responses of plants to a deficit of water include leaf wilting, a reduction in leaf area, leaf abscission, and thereby reducing water loss through transpiration, and increasing the rate of photosynthesis in relation to drought.
Critical global scenarios related to water availability for human consumption and crop production anticipated to arise in the near future, and intensive research is currently being conducted on basic and applied issues, from molecular to ecological approaches. Considering that up to 70-80% of the fresh water is utilized for irrigation of field crops, development of plants with less water requirements can contribute much to alleviate the problem of excessive water consumption in agriculture.
These responses improve the water-use efficiency of the plant on the short term and we can also improve the resistance in plant against certain stress by genetic manipulation for increased drought tolerance in plants, developing drought tolerant plants by traditional breeding and transgenic approaches.