中国稻米

中国稻米 ›› 2023, Vol. 29 ›› Issue (2): 43-47.DOI: 10.3969/j.issn.1006-8082.2023.02.009

• 专论与研究 • 上一篇    下一篇

亚精胺对盐胁迫下黄华占水稻幼苗根系抗氧化酶活性及Na+稳态的影响

黄婷婷1,2, 郑殿峰1,2, 冯乃杰1,2, 赵黎明1,2, 周鸿凯1,2, 沈雪峰1,2   

  1. 1.广东海洋大学 滨海农业学院，广东 湛江 524088
    2.国家耐盐碱水稻技术创新中心 华南中心，广东 湛江 524088
  • 收稿日期:2022-09-08 出版日期:2023-03-20 发布日期:2023-03-14
  • 通讯作者: *
  • 基金资助:
    广东海洋大学国家级创新创业训练计划项目(CXXL2020013);广东海洋大学科研启动费资助项目(R20062);广东省重点领域研发计划项目(2020B020219004)

Effects of Spermidine on Antioxidant Enzyme Activity and Na+ Homeostasis of Seedlings Roots of Huanghuazhan Rice under Salt Stress

HUANG Tingting1,2, ZHENG Dianfeng1,2, FENG Naijie1,2, ZHAO Liming1,2, ZHOU Hongkai1,2, SHEN Xuefeng1,2   

  1. 1. College of Coastal Agricultural Science, Guangdong Ocean University, Zhanjiang, Guangdong 524088, China
    2. South China Branch of National Saline Alkali Tolerant Rice Technology Innovation Center, Zhanjiang, Guangdong 524088, China
  • Received:2022-09-08 Online:2023-03-20 Published:2023-03-14
  • Contact: *

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摘要：

以黄华占种子为材料，研究盐胁迫条件下，外源亚精胺（Spd）对水稻幼苗根系的生长、抗氧化酶活性、活性氧（ROS）代谢、丙二醛（MDA）以及Na+稳态的影响。结果表明，经100 mmol/L NaCl溶液处理水稻幼苗根系的ROS、·O2-、H2O2、Na+和MDA含量显著升高，过氧化物酶（POD）和过氧化氢酶（CAT）活性显著降低；在盐胁迫条件下，施用0.1 mmol/L Spd显著提高水稻幼苗根系的CAT和POD活性，显著降低ROS、·O2-、H2O2、Na+和MDA含量，从而减轻Na+毒害和过氧化造成的膜损伤，保护生物膜系统的稳定，维持细胞的稳态。

关键词: 水稻, 外源Spd, 盐胁迫, 抗氧化防御, Na+

Abstract:

The effects of exogenous spermidine （Spd） on rice seedling growth, antioxidant enzyme activity, reactive oxygen species （ROS） metabolism, malonic dialdehyde （MDA） and Na+ homeostasis were studied with rice variety Huanghuazhan as the material. The results showed that the content of ROS、·O2-、H2O2、Na+ and MDA were significantly increased in the root of rice seedlings by treated with 100 mmol·L-1 NaCl, meanwhile, the activities of catalase （CAT） and peroxidase （POD） were remarkably reduced. However, the activities of CAT and POD were significantly enhanced by using 0.1 mmol·L-1 Spd, and the content of ROS、·O2-、H2O2、Na+ and MDA were remarkably decreased. So, the damage of Na+ toxicity and membrane oxidation were alleviated, the stability of biofilm system was protected, and the steady state of cells was maintained with Spd under salt stress condition.

Key words: rice, exogenous spermidine, salt stress, antioxidant defense, Na+

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