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Updated: Jul 16, 2025

Plant Promoter Analysis: Identification and Characterization of Root Nodule Specific Promoter in the Common Bean
Published on: December 23, 2017
Mechanism of symbiotic nodulation between nitrogen and peanut
Rui-Er Zeng1, Qing-Hui Geng1, Heng-Kuan Gao1
1Guangdong Provincial Key Laboratory of Plant Molecular Breeding, College of Agronomy, South China Agricultural University, Guangzhou 510642, China.
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.
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