Effect of Exogenous NO on Physiological Characteristics of Pinus Tabuliformis Carr. Under NaCl Stress

doi:10.11924/j.issn.1000-6850.casb20200200108

Abstract

Abstract:

By studying the effects of different NO supply methods on physiological characteristics of Pinus tabuliformis Carr. under NaCl stress, we aim to reveal the physiological response mechanism of NO to salt stress and to provide a theoretical basis for improving salt resistance of Pinus tabuliformis Carr.. A pot culture test was conducted, and 5 treatments of control (T1), NaCl treatment (T2), NaCl+one time soil supply NO (T3), NaCl+two times soil supply NO (T4), NaCl+spraying NO (T5) were set, repeating three times. The results showed that: compared with T1, T2 significantly increased the content of superoxide anion, MDA, soluble protein and free proline, and significantly enhanced the activity of SOD and POD; for NaCl and NO treatment, T3 significantly reduced the content of superoxide anion from May to June, and T5 significantly reduced the content of superoxide anion and MDA from August to September; from May to June, compared with T2, T3 increased SOD activity by 18.60% and 14.03%, respectively, and increased POD by 34.07% and 32.06%, respectively; from August to September, T5 had higher SOD activity than T2 by 15.77% and 13.33%, respectively, and higher POD activity by 17.70% and 15.75%, respectively; in May, compared with T2, T3 increased the content of free proline and soluble protein, and from August to September, T5 significantly increased the content of two osmotic substances compared with T2. According to the analysis, exogenous NO can improve the physiological characteristics of Pinus tabuliformis Carr. and its salt resistance.

Key words: NO, Pinus tabuliformis Carr., salt stress, physiological characteristics, response mechanism, salt resistance

CLC Number:

S723.9

Chen Fanjie. Effect of Exogenous NO on Physiological Characteristics of Pinus Tabuliformis Carr. Under NaCl Stress[J]. Chinese Agricultural Science Bulletin, 2020, 36(36): 67-73.

Figures/Tables 6

References 32

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