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Hereditas(Beijing) ›› 2023, Vol. 45 ›› Issue (9): 801-812.doi: 10.16288/j.yczz.23-083

• Review • Previous Articles     Next Articles

Mechanism of symbiotic nodulation between nitrogen and peanut

Ruier Zeng(), Qinghui Geng, Hengkuan Gao, Qingqing Pan, Tingting Chen, Yong Chen, Lei Zhang()   

  1. Guangdong Provincial Key Laboratory of Plant Molecular Breeding, College of Agronomy, South China Agricultural University, Guangzhou 510642, China
  • Received:2023-03-30 Revised:2023-06-07 Online:2023-09-20 Published:2023-07-11
  • Contact: Lei Zhang E-mail:ruierzeng@163.com;zhanglei@scau.edu.cn
  • Supported by:
    National Key R&D Program of China(2020YFD1000905);Guangdong Peanut and Soybean Industry Technology System Innovation Team(2021KJ136-05)

Abstract:

Nitrogen is critical for peanut growth and development, and symbiotic nodulation and nitrogen fixation is one of the main ways for peanut to obtain nitrogen. The influence of exogenous nitrogen on nodule nitrogen fixation involves complex regulatory mechanisms, revealing the regulatory mechanisms of nitrogen on nodule nitrogen fixation is of great significance for realizing the potential of biological nitrogen fixation. In this review, we summarize the mechanism of “Crack entry” in the formation of peanut root nodule, the mechanism of symbiotic nodulation and quantitative regulation of peanut, and the regulatory mechanism of nitrogen affecting peanut nodulation. At present, the molecular mechanism by which nitrogen affects the interaction between Bradyrhizobium and peanut, thereby regulating nodulation, is still unclear. Therefore, future research should focus on the signal exchange, nodule number regulation, and nutrient exchange mechanism of nitrogen effects on Bradyrhizobium and peanut, which would provide a theoretical basis for improving nodule nitrogen fixation efficiency and peanut yield, and reduce chemical nitrogen fertilizer application.

Key words: peanut, symbiotic nitrogen fixation, nodulation, nitrogen