Effects of Salt Stress on Growth and Quality of Lettuce(PDF)

《北方园艺》[ISSN:1001-0009/CN:23-1247/S]

Author(s):: LIU Guoqiang; XIE Aifang; LIN Duo; YANG Yanjie; (Horticultural College,Qingdao Agricultural University/Key Laboratory of Genetic Improvement and Breeding of Qingdao，Qingdao，Shandong 266109)

Abstract:: Lettuce ‘Carona’ was taken as experimental material with the method of sand potted.Nutrient elements were provided by watering Hoagland and coastal environment was simulated by watering NaCl solution.Four kinds of NaCl concentration (30,60,120,240 mmol?L-1) treatment were designed and taken water as control(CK)，the effects of salt stress on growth，physiological indexes and quality studied.The results showed that，the net increase of the number of leaves and lettuce and plant fresh weight were significantly decreased under salt stress.With increase of NaCl concentration，MDA and proline content continued to increase in lettuce leaves.The root activity，nitrate and quality were all in an increase trend under low NaCl concentration treatment，but a significant downward trend under high concentration treatment.Salt stress inhibited the normal growth of lettuce，except less than NaCl 60 mmol?L-1 treatment.These showed that low concentration of salt would not decrease the quality of lettuce，but higher salt stress lead to a significant reduction in morphogenesis and quality due to physiological metabolic abnormalities.

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Last Update: 2016-12-21