Mechanisms underlying legume-rhizobium symbioses  

作　　者：Jun Yang Liying Lan Yue Jin Nan Yu Dong Wang Ertao Wang 

机构地区：[1]Shanghai Key Laboratory of Plant Molecular Sciences,College of Life Sciences,Shanghai Normal University,Shanghai,200234 China [2]National Key Laboratory of Plant Molecular Genetics,CAS Center for Excellence in Molecular Plant Sciences,Institute of Plant Physiology and Ecology,Shanghai Institutes for Biological Sciences,the Chinese Academy of Sciences,Shanghai,200234 China [3]Department of Biochemistry and Molecular Biology,University of Massachusetts,Amherst,01003 USA

出　　处：《Journal of Integrative Plant Biology》2022年第2期244-267,共24页植物学报（英文版）

基　　金：supported by grants from the National Natural Science Foundation of China(32070270,32050081,and 31700208)。

摘　　要：Legumes,unlike most land plants,can form symbiotic root nodules with nitrogen-fixing bacteria to secure nitrogen for growth.The formation of nitrogen-fixing nodules on legume roots requires the coordination of rhizobial infection at the root epidermis with cell division in the cortex.The nodules house the nitrogen-fixing rhizobia in organelle-like structures known as symbiosomes,which enable nitrogen fixation and facilitate the exchange of metabolites between the host and symbionts.In addition to this beneficial interaction,legumes are continuously exposed to would-be pathogenic microbes;therefore the ability to discriminate pathogens from symbionts is a major determinant of plant survival under natural conditions.Here,we summarize recent advances in the understanding of root nodule symbiosis signaling,transcriptional regulation,and regulation of plant immunity during legume-rhizobium symbiosis.In addition,we propose several important questions to be addressed and provide insights into the potential for engineering the capacity to fix nitrogen in legume and nonlegume plants.

关 键 词：nodule organogenesis plant immunity root nodule symbiosis 

分 类 号：Q945.13[生物学—植物学]