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Arabidopsis De-etiolated 1 Represses Photomorphogenesis by Positively Regulating Phytochrome Interacting Factors in the Dark


ABSTRACT: Arabidopsis seedlings undergo photomorphogenic development even in darkness when the function of De-etiolated 1 (DET1), a repressor of photomorphogenesis, is disrupted. Our results indicate that DET1 directly interacts with a group of transcription factors known as the phytochrome-interacting factors (PIFs). Furthermore, our results suggest that DET1 positively regulates PIF protein levels primarily by stabilizing PIF proteins in the dark. Genomic analysis also revealed that DET1 may control the expression of light-regulated genes to mediate photomorphogenesis partially through PIFs. Total of twelve samples, two treatments and three genotypes, and each have three replicates.

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Xu Gao 

PROVIDER: E-GEOD-60835 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Arabidopsis DE-ETIOLATED1 represses photomorphogenesis by positively regulating phytochrome-interacting factors in the dark.

Dong Jie J   Tang Dafang D   Gao Zhaoxu Z   Yu Renbo R   Li Kunlun K   He Hang H   Terzaghi William W   Deng Xing Wang XW   Chen Haodong H  

The Plant cell 20140923 9


Arabidopsis thaliana seedlings undergo photomorphogenic development even in darkness when the function of DE-ETIOLATED1 (DET1), a repressor of photomorphogenesis, is disrupted. However, the mechanism by which DET1 represses photomorphogenesis remains unclear. Our results indicate that DET1 directly interacts with a group of transcription factors known as the phytochrome-interacting factors (PIFs). Furthermore, our results suggest that DET1 positively regulates PIF protein levels primarily by sta  ...[more]

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