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

• Special Section: Excellent Doctoral Thesis • Previous Articles     Next Articles

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)

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