TCP2 positively regulatesHY5/HYHand photomorphogenesis in Arabidopsis | Zendy

Zhimin He | Zendy; Xiaoying Zhao | Zendy; Fanna Kong | Zendy; Zecheng Zuo | Zendy; Xuanming Liu | Zendy

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TCP2 positively regulatesHY5/HYHand photomorphogenesis in Arabidopsis

Author(s) -

Zhimin He,

Xiaoying Zhao,

Fanna Kong,

Zecheng Zuo,

Xuanming Liu

Publication year - 2015

Publication title -

journal of experimental botany

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.616

H-Index - 242

eISSN - 1460-2431

pISSN - 0022-0957

DOI - 10.1093/jxb/erv495

Subject(s) - cryptochrome , photomorphogenesis , arabidopsis , phytochrome a , microbiology and biotechnology , transcription factor , hypocotyl , biology , phytochrome , repressor , transcription (linguistics) , botany , genetics , gene , mutant , red light , circadian clock , linguistics , philosophy

Light regulates plant growth and development via multiple photoreceptors including phytochromes and cryptochromes. Although the functions of photoreceptors have been studied extensively, questions remain regarding the involvement of cryptochromes in photomorphogenesis. In this study, we identified a protein, TEOSINTE-LIKE1, CYCLOIDEA, and PROLIFERATING CELL FACTOR 2 (TCP2), which interacts with the cryptochrome 1 (CRY1) protein in yeast and plant cells via the N-terminal domains of both proteins. Transgenic plants overexpressing TCP2 displayed a light-dependent short hypocotyl phenotype, especially in response to blue light. Moreover, light affected TCP2 expression in a wavelength-dependent manner and TCP2 positively regulates mRNA expression of HYH and HY5. These results support the hypothesis that TCP2 is a transcription activator which acts downstream of multiple photoreceptors, including CRY1.

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