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PMID: 31078553 Published · ppublish English Journal Article

TCP Transcription Factors Associate with PHYTOCHROME INTERACTING FACTOR 4 and CRYPTOCHROME 1 to Regulate Thermomorphogenesis in Arabidopsis thaliana.

iScience ·Vol. 15 ·2019-05-31 ·Pages 600-610

Zhou Y, Xun Q, Zhang D, Lv M, Ou Y, Li J

Abstract

Temperature, one of the most critical environmental cues, greatly affects plant growth, development, and reproduction. PHYTOCHROME-INTERACTING FACTOR 4 (PIF4), a key transcription factor in light signaling pathway, plays a central role in temperature-mediated growth responses. How higher temperature regulates the function of PIF4, however, is not well understood. Here we demonstrate that three phylogenetically related TEOSINTE BRANCHED 1/CYCLOIDEA/PCF (TCP) transcription factors, TCP5, TCP13, and TCP17, play fundamental roles in promoting thermoresponsive hypocotyl growth by positively regulating the activity of PIF4. TCP17 was found to interact with a blue light receptor, CRYPTOCHROME 1 (CRY1), at lower temperature, leading to reduced activity of TCP17. Higher temperature can increase the stability of TCP17, and release TCP17 from the CRY1-TCP17 complex, allowing it to upregulate the expression of PIF4 and enhance the transcriptional activity of PIF4. This study revealed the important roles of TCPs in regulating the activity of PIF4 in thermomorphogenesis.

Keywords
Biological Sciences Molecular Biology Plant Biology
Authors & Affiliations
6 authors, click to expand affiliations / ORCID
Zhou Yu
Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China.
Xun Qingqing
Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China.
Zhang Dongzhi
Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China.
Lv Minghui
Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China.
Ou Yang
Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China.
Li Jia
Ministry of Education Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, P.R. China. Electronic address: lijia@lzu.edu.cn.
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Article Info
Journal
iScience
Abbr.
iScience
ISSN
2589-0042
DOI
10.1016/j.isci.2019.04.002
Email
lijia@lzu.edu.cn
Published
2019-05-31
Epub
2019-00-08
Pages
600-610
Language
English
Region
United States
NLM ID
101724038
PMCID
PMC6547012
External Links
PubMed source DOI: 10.1016/j.isci.2019.04.002 PMC Full Text View journal details
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