PJB-2018-230
Drought and heat stresses in cotton (Gossypium hirsutum L.): Consequences and conceivable alleviation techniques
EL Sabagh Ayman
Abstract
Drought and heat stresses are the most important abiotice stresses that adversely affect the yield and fiber quality of cotton in worldwide. The alarming for global climate change has also augmented that the situation might be worse in the near future. Thus, development of high yielding cotton genotypes those are resistance to drought and heat stresses is one of the most important burning issue for cotton breeders in all over the world. Therefore, it is important to study the tolerance of cotton genotypes under heat and drought stress and also important to understand the physiological, biochemical responses to stresses as well as agronomical performance of the genotypes under stress conditions. The correlation between yield and physiological as well as biochemical (non-enzymatic antioxidants and enzymatic antioxidants) response of cotton under heat and drought stress conditions are also the most important to develop the efficient genotypes that are possible to grow. Whereas, screening of cotton genotypes under heat and drought stress is one of the essential protocols that can be used to select large number of population within the shortest period of time. This approach can be used to differentiate the agronomical, physiological and biochemical attributes of cotton genotypes contrasting for drought and heat stress tolerance. The present review tried to highlights the management strategies that could be useful to mitigate the drought and heat stress by using antioxidants, nutrients management and other appropriate management strategies for maximizing cotton yield. While, among the compatible antioxidants, exogenous application of proline or glycine betaine is a good strategy to improve drought and heat tolerance in cotton. Therefore, foliar application of antioxidants in combination with soil application of organic fertilizers is very effective for reducing negative effect of drought and heat stress and to increase productivity and quality of soybean.
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