Plant circadian clock control of Medicago truncatula nodulation via regulation of nodule cysteine-rich peptides

Plant circadian clock control of Medicago truncatula nodulation via regulation of nodule cysteine-rich peptides

© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology.

Détails bibliographiques
Publié dans:Journal of experimental botany. - 1985. - 73(2022), 7 vom: 05. Apr., Seite 2142-2156
Auteur principal: Achom, Mingkee (Auteur)
Autres auteurs: Roy, Proyash, Lagunas, Beatriz, Picot, Emma, Richards, Luke, Bonyadi-Pour, Roxanna, Pardal, Alonso J, Baxter, Laura, Richmond, Bethany L, Aschauer, Nadine, Fletcher, Eleanor M, Rowson, Monique, Blackwell, Joseph, Rich-Griffin, Charlotte, Mysore, Kirankumar S, Wen, Jiangqi, Ott, Sascha, Carré, Isabelle A, Gifford, Miriam L
Format: Article en ligne
Langue:English
Publié: 2022
Accès à la collection:Journal of experimental botany
Sujets:Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Medicago truncatula Circadian biology nitrogen fixation nodulation plant–environment interaction symbiosis Peptides plus... Plant Proteins Cysteine K848JZ4886
Description
Résumé:© The Author(s) 2021. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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
Description:Date Completed 07.04.2022
Date Revised 10.05.2022
published: Print
Citation Status MEDLINE
ISSN:1460-2431
DOI:10.1093/jxb/erab526