期刊
NEW PHYTOLOGIST
卷 -, 期 -, 页码 -出版社
WILEY
DOI: 10.1111/nph.19367
关键词
Compact Root Architecture 2 receptor; C-terminally encoded peptides; nitrogen deficit; nitrogen fixation; rhizobia bacteria; root nodule symbiosis
C-terminally encoded peptides (CEP) play a role in regulating nitrogen acquisition pathways in plants. Recent studies in Medicago truncatula have shown that root-produced CEP peptides control the symbiotic competence of rhizobia through the activity of the CRA2 receptor in shoots.
C-terminally encoded peptides (CEP) signaling peptides are drivers of systemic pathways regulating nitrogen (N) acquisition in different plants, from Arabidopsis to legumes, depending on mineral N availability (e.g. nitrate) and on the whole plant N demand. Recent studies in the Medicago truncatula model legume revealed how root-produced CEP peptides control the root competence for endosymbiosis with N fixing rhizobia soil bacteria through the activity of the Compact Root Architecture 2 (CRA2) CEP receptor in shoots. Among CEP genes, MtCEP7 was shown to be tightly linked to nodulation, and the dynamic temporal regulation of its expression reflects the plant ability to maintain a different symbiotic root competence window depending on the symbiotic efficiency of the rhizobium strain, as well as to reinitiate a new window of root competence for nodulation.
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