A competition-attenuation mechanism modulates thermoresponsive growth at warm temperatures in plants

A competition-attenuation mechanism modulates thermoresponsive growth at warm temperatures in plants

© 2022 The Authors. New Phytologist © 2022 New Phytologist Foundation.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 237(2023), 1 vom: 19. Jan., Seite 177-191
1. Verfasser: Li, Wei (VerfasserIn)
Weitere Verfasser: Tian, Ying-Ying, Li, Jin-Yu, Yuan, Li, Zhang, Lin-Lin, Wang, Zhi-Ye, Xu, Xiaodong, Davis, Seth Jon, Liu, Jian-Xiang
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Arabidopsis thaliana RVE5 hypocotyl growth thermomorphogenesis warm temperature Arabidopsis Proteins
Beschreibung
Zusammenfassung:© 2022 The Authors. New Phytologist © 2022 New Phytologist Foundation.
Global warming has profound impact on growth and development, and plants constantly adjust their internal circadian clock to cope with external environment. However, how clock-associated genes fine-tune thermoresponsive growth in plants is little understood. We found that loss-of-function mutation of REVEILLE5 (RVE5) reduces the expression of circadian gene EARLY FLOWERING 4 (ELF4) in Arabidopsis, and confers accelerated hypocotyl growth under warm-temperature conditions. Both RVE5 and CIRCADIAN CLOCK ASSOCIATED 1 (CCA1) accumulate at warm temperatures and bind to the same EE cis-element presented on ELF4 promoter, but the transcriptional repression activity of RVE5 is weaker than that of CCA1. The binding of CCA1 to ELF4 promoter is enhanced in the rve5-2 mutant at warm temperatures, and overexpression of ELF4 in the rve5-2 mutant background suppresses the rve5-2 mutant phenotype at warm temperatures. Therefore, the transcriptional repressor RVE5 finetunes ELF4 expression via competing at a cis-element with the stronger transcriptional repressor CCA1 at warm temperatures. Such a competition-attenuation mechanism provides a balancing system for modulating the level of ELF4 and thermoresponsive hypocotyl growth under warm-temperature conditions
Beschreibung:Date Completed 07.12.2022
Date Revised 14.12.2022
published: Print-Electronic
CommentIn: New Phytol. 2023 Jan;237(1):9-11. - PMID 36367054
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.18442