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Madiha Butt,Abdul Sattar,Tahira Abbas,Ahmad Sher,Muhammad Ijaz,Sami Ul-Allah,Muhammad Rashid Shaheen,Fawad Kaleem 한국원예학회 2020 Horticulture, Environment, and Biotechnology Vol.61 No.4
Globally, soil salinity is a serious threat to horticultural crop productivity. Chili ( Capsicum annum L.) is a major spice horticulturalcrop. Its growth and production is severely aff ected by salt stress. To address this problem, a sand culture experimentwas conducted in which two contrasting chili genotypes ‘ Plahi ’ (salt tolerant) and ‘A-120’ (salt sensitive) were grown undersalt stress (50 mM NaCl) with foliar application of proline (0.8 mM). Proline application enhanced salt tolerance in bothgenotypes by osmoregulation of sodium and potassium. It enhanced chili growth and fruit yield by improving plant waterrelations and gas exchange attributes under salt stress. Antioxidants were increased with proline application under salt stress. There was also a signifi cant positive correlation found among glycinebetaine and proline contents. In conclusion, proteintreatedchili plants performed better than untreated plants as evidenced by normal function of photosynthetic machinery andantioxidant mechanisms under salt stress.