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Acta Agron Sin ›› 2017, Vol. 43 ›› Issue (11): 1677-1688.doi: 10.3724/SP.J.1006.2017.01677


Effect of Exogenous Salicylic Acid, Proline and γ-Aminobutyric Acid on Yield of Rice under Salt Stress

SHA Han-Jing, HU Wen-Cheng, JIA Yan, WANG Xin-Peng, TIAN Xue-Fei, YU Mei-Fang, and ZHAO Hong-Wei*   

  1. Rice Research Institute, Northeast Agricultural University, Harbin 150030, China
  • Received:2017-02-16 Revised:2017-07-23 Online:2017-11-12 Published:2017-08-01
  • Contact: 赵宏伟,E-mail:hongweizhao_cool@126.com, Tel: 0451-55190292 E-mail:nkxshahanjing@163.com
  • Supported by:

    This study was supported by the funding from National Key R&D Program (2016YFD0300104), Science and Technology Tender Program of Heilongjiang Province (GA14B102).


Salicylic acid (SA), proline (Pro) and γ-aminobutyric acid (GABA) play important roles in plant growth and development and tolerating stress. In order to investigate whether the combination of SA, Pro, and GABA had synergistic effect on the yield of rice under salt stress, the mathematical models were established by means of quadratic general rotary unitized design. The optimal combination of SA, Pro, and GABA was obtained by frequency analysis. The results demonstrated that the quadratic models fit better. The effects on the yield of rice under salt stress were SA>GABA>Pro. The interactions between SA and GABA, and between Pro and GABA showed significant effects on rice yield under salt stress.The recommended optimal combination is 0.44-0.51mmol L-1 for SA, 27.63-31.20mmol L-1 for Pro and 3.55-4.28mmol L-1for GABA, which can improve the rice yield more than 10% under salt stress. The effect of a single or a combinationof SA, Pro and GABA on the yield of salt-sensitive variety MDJ30 was larger than that of salt-tolerant variety LD5. The combination of SA and GABA, or Pro and GABA showed synergistic effect on the yield of rice under salt stress, while the combination effect of SA and Pro was related to the genotype difference in salt tolerance. The joint application of SA, Pro and GABA showed better effect on the yield of rice under salt stress than that of any two of them. The combination between any single agent and theother two agentsshowed synergistic effect.

Key words: Quadratic general rotary unitized design, Synergistic effects, Salt stress, Rice, Yield

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