DC Field | Value | Language |
---|---|---|
dc.contributor.author | Seo, Pil Joon | ko |
dc.contributor.author | Park, Mi-Jeong | ko |
dc.contributor.author | Lim, Mi-Hye | ko |
dc.contributor.author | Kim, Sang-Gyu | ko |
dc.contributor.author | Lee, Minyoung | ko |
dc.contributor.author | Baldwin, Ian T. | ko |
dc.contributor.author | Park, Chung-Mo | ko |
dc.date.accessioned | 2017-11-08T05:47:41Z | - |
dc.date.available | 2017-11-08T05:47:41Z | - |
dc.date.created | 2017-11-07 | - |
dc.date.created | 2017-11-07 | - |
dc.date.issued | 2012-06 | - |
dc.identifier.citation | The Plant Cell, v.24, no.6, pp.2427 - 2442 | - |
dc.identifier.issn | 1531-298X | - |
dc.identifier.uri | http://hdl.handle.net/10203/226958 | - |
dc.description.abstract | The circadian clock synchronizes biological processes to daily cycles of light and temperature. Clock components, including CIRCADIAN CLOCK-ASSOCIATED1 (CCA1), are also associated with cold acclimation. However, it is unknown how CCA1 activity is modulated in coordinating circadian rhythms and cold acclimation. Here, we report that self-regulation of Arabidopsis thaliana CCA1 activity by a splice variant, CCA1β, links the clock to cold acclimation. CCA1β interferes with the formation of CCA1α-CCA1α and LATE ELONGATED HYPOCOTYL (LHY)-LHY homodimers, as well as CCA1α-LHY heterodimers, by forming nonfunctional heterodimers with reduced DNA binding affinity. Accordingly, the periods of circadian rhythms were shortened in CCA1β-overexpressing transgenic plants (35S:CCA1β), as observed in the cca1 lhy double mutant. In addition, the elongated hypocotyl and leaf petiole phenotypes of CCA1α-overexpressing transgenic plants (35S:CCA1α) were repressed by CCA1β coexpression. Notably, low temperatures suppressed CCA1 alternative splicing and thus reduced CCA1β production. Consequently, whereas the 35S:CCA1α transgenic plants exhibited enhanced freezing tolerance, the 35S:CCA1β transgenic plants were sensitive to freezing, indicating that cold regulation of CCA1 alternative splicing contributes to freezing tolerance. On the basis of these findings, we propose that dynamic self-regulation of CCA1 underlies the clock regulation of temperature responses in Arabidopsis. | - |
dc.language | English | - |
dc.publisher | American Society of Plant Biologists | - |
dc.title | A Self-Regulatory Circuit of CIRCADIAN CLOCK-ASSOCIATED1 Underlies the Circadian Clock Regulation of Temperature Responses in Arabidopsis | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.citation.volume | 24 | - |
dc.citation.issue | 6 | - |
dc.citation.beginningpage | 2427 | - |
dc.citation.endingpage | 2442 | - |
dc.citation.publicationname | The Plant Cell | - |
dc.identifier.doi | 10.1105/tpc.112.098723 | - |
dc.contributor.localauthor | Kim, Sang-Gyu | - |
dc.contributor.nonIdAuthor | Seo, Pil Joon | - |
dc.contributor.nonIdAuthor | Park, Mi-Jeong | - |
dc.contributor.nonIdAuthor | Lim, Mi-Hye | - |
dc.contributor.nonIdAuthor | Lee, Minyoung | - |
dc.contributor.nonIdAuthor | Baldwin, Ian T. | - |
dc.contributor.nonIdAuthor | Park, Chung-Mo | - |
dc.description.isOpenAccess | N | - |
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