Plant circadian clock control of Medicago truncatula nodulation via regulation of nodule cysteine-rich peptides.
Medicago truncatula
Circadian biology
nitrogen fixation
nodulation
plant–environment interaction
symbiosis
Journal
Journal of experimental botany
ISSN: 1460-2431
Titre abrégé: J Exp Bot
Pays: England
ID NLM: 9882906
Informations de publication
Date de publication:
05 04 2022
05 04 2022
Historique:
received:
30
04
2021
accepted:
30
11
2021
pubmed:
2
12
2021
medline:
8
4
2022
entrez:
1
12
2021
Statut:
ppublish
Résumé
Legumes house nitrogen-fixing endosymbiotic rhizobia in specialized polyploid cells within root nodules, which undergo tightly regulated metabolic activity. By carrying out expression analysis of transcripts over time in Medicago truncatula nodules, we found that the circadian clock enables coordinated control of metabolic and regulatory processes linked to nitrogen fixation. This involves the circadian clock-associated transcription factor LATE ELONGATED HYPOCOTYL (LHY), with lhy mutants being affected in nodulation. Rhythmic transcripts in root nodules include a subset of nodule-specific cysteine-rich peptides (NCRs) that have the LHY-bound conserved evening element in their promoters. Until now, studies have suggested that NCRs act to regulate bacteroid differentiation and keep the rhizobial population in check. However, these conclusions came from the study of a few members of this very large gene family that has complex diversified spatio-temporal expression. We suggest that rhythmic expression of NCRs may be important for temporal coordination of bacterial activity with the rhythms of the plant host, in order to ensure optimal symbiosis.
Identifiants
pubmed: 34850882
pii: 6447273
doi: 10.1093/jxb/erab526
pmc: PMC8982390
doi:
Substances chimiques
Peptides
0
Plant Proteins
0
Cysteine
K848JZ4886
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.
Langues
eng
Sous-ensembles de citation
IM
Pagination
2142-2156Subventions
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/P002145/1
Pays : United Kingdom
Organisme : Midlands Integrative Bioscience Training Partnership
Organisme : Warwick Chancellor's International Scholarship Scheme
Organisme : International Commonwealth Commission
Organisme : Centre National De La Recherche Scientifique
Organisme : Noble Research Institute
Organisme : National Science Foundation
ID : DBI-0703285
Organisme : Bioinformatics Research Technology Platform
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/T015357/1
Pays : United Kingdom
Informations de copyright
© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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