外源水杨酸处理油菜幼苗对盐胁迫的生理响应

doi:10.19640/j.cnki.jtau.2022.02.005

Journal of Tianjin Agricultural University ›› 2022, Vol. 29 ›› Issue (2): 22-26.doi: 10.19640/j.cnki.jtau.2022.02.005

• Researches and Scientific Notes • Previous Articles Next Articles

Physiological response of salicylic acid on physiological characteristics of rape seeding under salt stress

Pan Leiwen¹, Xiang Chunyang^{1,Corresponding Author}, Ding Jianwen², Liu Jiangbo¹, Du Jin¹, Cao Gaoyi¹

1. College of Agronomy and Resource Environment, Tianjin Agricultural University, Tianjin 300392, China;
2. Tianjin Zhongtian Runnong Technology Co., Ltd., Tianjin 300000, China

Received:2021-02-19 Online:2022-06-30 Published:2022-07-05

Abstract

Abstract: The salinized land area accounts for 65.8% of the total land area in Tianjin. As an oil crop and a crop to improve the ecological environment, rape has a broad application prospect, and it is of great significance to study the salt tolerance of rape. The effects of exogenous salicylic acid on physiological characteristics of rape seedlings were studied under soil conditions with different salt content. The results showed that the soluble sugar content of rape seedlings increased significantly with the increase of salt content in the range of soil salt content from 0.04% to 0.35%, and decreased significantly with the further increase of salt content. The content of soluble sugar, soluble protein and proline in rape seedlings treated with salicylic acid were significantly increased compared with the control group under salt stress, while the content of malondialdehyde in rape seedlings treated with salicylic acid was significantly decreased compared with the control group. Compared with the control group, the catalase activity of rape seedlings was significantly increased by salicylic acid treatment at the high salt content above 0.35%. Compared with the control group, the superoxide dismutase activity of rape seedlings was significantly increased by salicylic acid treatment under various soil salt contents. The exogenous salicylic acid can increase the osmotic substance content, reduce the malondialdehyde content and enhance the activity of antioxidant enzymes of rape seedlings to alleviate the salt damage of rape. It is one of the effective methods to improve salt tolerance of rape seedlings by exogenous salicylic acid treatment.

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

CLC Number:

S565.4

Pan Leiwen, Xiang Chunyang, Ding Jianwen, Liu Jiangbo, Du Jin, Cao Gaoyi. Physiological response of salicylic acid on physiological characteristics of rape seeding under salt stress[J]. Journal of Tianjin Agricultural University, 2022, 29(2): 22-26.

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Physiological response of salicylic acid on physiological characteristics of rape seeding under salt stress

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