COTTON RESPONSE TO DIFFERENTIAL SALT STRESS

Cotton also cultivated in parts of dry saline rainfed and irrigated areas. It is relatively salt tolerant. However, response of four cotton species (Gossypium hirsutum, G.arboreum, G. herbaceum and G. barbadense) and their cultivars varies with different concentrations of sodium chloride (NaCl) and other salts. The different salts (NaCl, NaHCO3, MgSO4 and CaCl2) present in salinity areas were also causes salt injury. Salt stress at root zone negatively affects the normal cotton growth, nutrient uptake and physiology. The reduced leaf area expansion, osmotic potential, leaf water potential and higher osmotic stress, ionic stress affects the photosynthetic rate (Pn) along with specific ion toxicity. Salinity impaired the cotton growth, nutrient imbalance and seed cotton yield as well as fibre quality under saline conditions. Under salinity behavioral pattern was not same at all stages (Seed germination, seedling emergence, vegetative growth, squaring, flowering, boll initiation and development) of cotton. The present review examines current scenario and potential paradoxes of impact salt stress and adaptations by cotton at morphological, physiological and biochemical parameters