遗传 ›› 2023, Vol. 45 ›› Issue (5): 367-378.doi: 10.16288/j.yczz.23-084

• 优博专栏 • 上一篇    下一篇

水稻分蘖氮响应调控机理研究进展

刘永强1(), 李威威1(), 刘昕禹2, 储成才1,3()   

  1. 1.中国科学院遗传与发育生物学研究所,植物基因组学国家重点实验室,北京 100101
    2.中国农业大学资源与环境学院,北京 100193
    3.华南农业大学农学院,岭南现代农业广东省实验室,广州 510642
  • 收稿日期:2023-03-31 修回日期:2023-04-25 出版日期:2023-05-20 发布日期:2023-05-04
  • 通讯作者: 储成才 E-mail:yqliu@genetics.ac.cn;liwei@genetics.ac.cn;ccchu@scau.edu.cn
  • 作者简介:刘永强,博士,研究方向:水稻氮高效利用分子机制解析。E-mail: yqliu@genetics.ac.cn。2015—2020年就读于中国科学院遗传与发育生物学研究所,在储成才课题组攻读博士学位,目前在遗传发育所从事博士后研究。博士期间,主要研究方向为水稻氮高效利用的遗传基础解析,发现分蘖氮响应对水稻氮素利用效率的重要决定作用,阐明了 OsTCP19-DLT-BR信号途径对水稻分蘖氮响应的调控机制,揭示了亚洲不同稻区土壤氮含量对OsTCP19氮高效等位的选择性保留规律,为氮对植物生长发育调控及水稻氮高效利用提供新的见解(Nature,2021)。博士论文《水稻分蘖氮响应遗传基础解析》获得2022年中国科学院优秀博士生论文。|李威威,在读博士研究生,研究方向:水稻铵态氮高效利用遗传基础解析。E-mail: liwei@genetics.ac.cn;
    刘永强和李威威并列第一作者。
  • 基金资助:
    国家自然科学基金项目(32102477);博士后创新人才支持计划(BX2021352)

Molecular mechanism of tillering response to nitrogen in rice

Yongqiang Liu1(), Weiwei Li1(), Xinyu Liu2, Chengcai Chu1,3()   

  1. 1. State Key Laboratory of Plant Genomics, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, Beijing 100101, China
    2. College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China
    3. Guangdong Laboratory for Lingnan Modern Agriculture, College of Agriculture, South China Agricultural University, Guangzhou 510642, China
  • Received:2023-03-31 Revised:2023-04-25 Online:2023-05-20 Published:2023-05-04
  • Contact: Chu Chengcai E-mail:yqliu@genetics.ac.cn;liwei@genetics.ac.cn;ccchu@scau.edu.cn
  • Supported by:
    National Natural Science Foundation of China(32102477);China National Postdoctoral Program for Innovative Talents(BX2021352)

摘要:

氮肥是作物产量增加最主要的驱动因素,然而氮肥滥用会造成生态环境的严重破坏。因此,提高作物氮素利用效率(nitrogen use efficiency,NUE)对未来农业可持续发展至关重要。产量性状对氮素的敏感性是衡量作物氮素利用效率的重要指标。禾本科作物的分蘖数、穗粒数和粒重是产量的直接决定因子,虽然影响三者本身的分子机制已有大量研究,但氮素对这些性状的调控机理仍知之甚少。分蘖数是对氮素响应最为敏感的性状之一,也是氮肥促进作物增产的关键要素。因此,研究氮素如何调控水稻的分蘖发育对于提高作物产量尤为重要。本文总结了水稻氮素利用效率的影响因素和分蘖发育的调控机理,聚焦氮素如何调控水稻分蘖发育的机制,并对该领域未来研究工作进行了展望,以期为作物氮高效精准改良提供参考。

关键词: 水稻, 氮素利用效率, 分蘖, 氮响应

Abstract:

Nitrogen (N) fertilizer acts as the main driving force for agricultural productivity improvement. However, overuse of N fertilizer has caused severe effects to environment and ecosystem. Thus, it is pivotal to improve nitrogen use efficiency (NUE) for future sustainable agriculture. Agronomic traits response to N are significant indices for NUE phenotyping. For example, tiller number, grain number per panicle, and grain weight are three major components for cereal yields. Although regulatory mechanisms regarding to these three traits have been largely reported, few is known about how N affects them. Tiller number is one of the most sensitive traits response to N and also plays a key role for N-promoted yield improvement. It is thereby of great significance to dissect the genetic basis underlying tillering response to N. In this review, we summarize the factors contributing to NUE as well as the regulatory mechanisms over rice tillering and emphasize how N affects rice tillering, future research directions are also discussed for further improving NUE.

Key words: rice, nitrogen use efficiency, tillering, nitrogen response