盐胁迫下水杨酸对苜蓿幼苗生理特性的影响

doi:10.19640/j.cnki.jtau.2022.03.004

Journal of Tianjin Agricultural University ›› 2022, Vol. 29 ›› Issue (3): 19-22.doi: 10.19640/j.cnki.jtau.2022.03.004

• Researches and Scientific Notes • Previous Articles Next Articles

Effects of salicylic acid on physiological characteristics of alfalfa seedlings under salt stress

Wang Dan^a, Wang Luyao^b, Dong Jiaxi^b, Tian Xiuping^{b,Corresponding Author}

Tianjin Agricultural University, a. College of Horticulture and Landscape, b. College of Agronomy and Resource Environment, Tianjin 300392, China

Received:2021-05-09 Online:2022-09-30 Published:2022-10-10

Abstract

Abstract: In order to understand the effects of exogenous salicylic acid on physiological characteristics of alfalfa seedlings under salt stress, the contents of soluble protein, soluble sugar, proline and malondialdehyde, as well as the activities of peroxidase and superoxide dismutase were analyzed by soaking the alfalfa variety ‘Zhongmu No. 3’ in 1 mmol/L salicylic acid solution for 12 h and 5 kinds of salt contents. The results showed that the soluble protein content, soluble sugar content, superoxide dismutase activity and peroxidase activity of alfalfa seedlings were significantly increased compared with the control group by salicylic acid in the range of soil salt content from 0.20% to 0.52%. The proline content of alfalfa seedlings was significantly increased with salicylic acid at soil salt content from 0.35% to 0.52%. The content of malondialdehyde in alfalfa seedlings was significantly reduced by salicylic acid when the soil salt content was 0.20%~0.52%. The salt resistance of alfalfa seedlings could be enhanced with exogenous salicylic acid by enhancing the activity of antioxidant enzymes, increasing the content of osmotic substances and decreasing the content of malondialdehyde.

Key words: alfalfa, salt stress, salicylic acid, seedlings, physiological characteristics

CLC Number:

Wang Dan, Wang Luyao, Dong Jiaxi, Tian Xiuping. Effects of salicylic acid on physiological characteristics of alfalfa seedlings under salt stress[J]. Journal of Tianjin Agricultural University, 2022, 29(3): 19-22.

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Effects of salicylic acid on physiological characteristics of alfalfa seedlings under salt stress

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