植物学报 ›› 2025, Vol. 60 ›› Issue (1): 17-32.DOI: 10.11983/CBB24038  cstr: 32102.14.CBB24038

• 研究论文 • 上一篇    下一篇

水稻OsWAK16通过调节抗氧化酶活性调控种子抗老化能力(长英文摘要

田建红1,, 刘燕1,, 尹梦琪1, 王静1, 陈婷1, 汪燕1, 姜孝成1,2,*()   

  1. 1湖南师范大学生命科学学院, 长沙 410081
    2作物不育资源创新与利用湖南省重点实验室, 长沙 410081
  • 收稿日期:2024-03-09 接受日期:2024-07-14 出版日期:2025-01-10 发布日期:2024-07-23
  • 通讯作者: * 姜孝成, 博士, 湖南师范大学二级教授, 博士生导师。主要从事水稻种子活力调控及其分子机制研究, 主持和承担国家自然科学基金、国家科技部基础条件平台建设、湖南省自然科学基金等科研项目。以第一作者或通讯作者身份在Journal of Integrative Plant Biology、BMC Plant Biology等权威期刊上发表论文60余篇。兼任中国植物学会种子科学与技术专业委员会委员, 湖南省植物学会常务理事, 湖南省植物生理与分子生物学学会常务理事, 《生命科学研究》编辑委员会委员。担任Plant Biotechnology Journal、BMC Plant Biology、Molecular Breeding等国际期刊审稿人。E-mail: jxclc@hunnu.edu.cn
  • 作者简介:共同第一作者
  • 基金资助:
    国家自然科学基金(32072125);湖南省发育生物学工程与新产品协同创新中心(20134486)

OsWAK16 Regulates Seed Anti-aging Ability by Modulating Antioxidant Enzyme Activity in Rice

Jianhong Tian1,, Yan Liu1,, Mengqi Yin1, Jing Wang1, Ting Chen1, Yan Wang1, Xiaocheng Jiang1,2,*()   

  1. 1School of Life Sciences, Hunan Normal University, Changsha 410081, China
    2Hunan Province Key Laboratory of Crop Sterile Germplasm Resource Innovation and Application, Changsha 410081, China
  • Received:2024-03-09 Accepted:2024-07-14 Online:2025-01-10 Published:2024-07-23
  • Contact: * E-mail: jxclc@hunnu.edu.cn
  • About author:These authors contributed equally to this paper

摘要: 细胞壁相关蛋白激酶(WAK)家族成员在水稻(Oryza sativa)基因组中已注释了大约130个WAK基因, 它们在水稻生长发育和应激响应中发挥重要作用。该文探讨了水稻WAK16-RLK的编码基因OsWAK16对水稻种子活力和抗老化能力的调控作用及其生理机制。结果表明, OsWAK16敲除突变体的种子活力在种子未老化和人工老化12天时均显著低于野生型种子, 过表达种子的活力则显著高于野生型种子, 说明OsWAK16正调控种子活力和抗老化能力。同时, 相比野生型种子, 未老化和人工老化12天的OsWAK16敲除突变体种子中丙二醛含量以及种子浸泡液电导率显著增加, 抗氧化酶活性则显著下降; 过表达种子中的变化则相反。此外, 野生型、OsWAK16突变和过表达种子在人工老化处理后, OsWAK16的差异表达也引起OsPER1AOsbZIP23OsPIMT1OsSdr4OsMSRB5OsHSP18.2等种子活力相关基因表达的协同变化。因此, 推测OsWAK16可能与其它种子活力相关基因协同作用, 行使清除细胞中活性氧的功能, 从而调控种子活力和抗老化能力。

关键词: OsWAK16, 种子活力, 人工老化, 丙二醛, 抗氧化酶

Abstract: INTRODUCTION: The cell wall-associated kinase (WAK) family has annotated approximately 130 WAK genes in the genome of rice (Oryza sativa), which play an important role in rice growth and development and stress responses.


RATIONALE: Here, we investigated the regulation and physiological mechanism of OsWAK16, an encoding gene of the cell wall-associated kinase WAK16-RLK, on rice seed vigor and anti-aging ability.
 
RESULTS: The results showed that before and after artificial aging, the seed vigor of OsWAK16 knock out mutants and overexpression lines was significantly lower and higher than that of wild-type seeds, respectively, indicating that OsWAK16 positively regulates the anti-aging ability of seeds. Physiological and biochemical analyses indicated that compared with wild-type seeds before and after artificial aging treatment, malondialdehyde (MDA) content and electrical conductivity (EC) of seed soaking solution of OsWAK16 knock out mutant seeds were significantly increased, while antioxidant enzyme activity was significantly decreased. The reverse was true in overexpression seeds. In addition, the differential expression of OsWAK16 in three types of seeds, whether artificially aged or not, also caused synergistic changes in the expression of other seed vigor-related genes OsPER1A, OsbZIP23, OsPIMT1, OsSdr4, OsMSRB5 and OsHSP18.2.
 
CONCLUSION: Therefore, it is speculated that OsWAK16 may work synergistically with other seed vigor-related genes to clear reactive oxygen species in cells, thereby regulating seed vigor and anti-aging capacity.

Key words: OsWAK16, seed vigor, artificial aging, malondialdehyde, antioxidant enzyme