title: Arabidopsis CBF3 and DELLAs positively regulate each other in response to low temperature.
abstract: The C-repeat binding factor (CBF) is crucial for regulation of cold response in higher plants. In Arabidopsis, the mechanism of CBF3-caused growth retardation is still unclear. Our present work shows that CBF3 shares the similar repression of bioactive gibberellin (GA) as well as upregulation of DELLA proteins with CBF1 and -2. Genetic analysis reveals that DELLAs play an essential role in growth reduction mediated by CBF1, -2, -3 genes. The in vivo and in vitro evidences demonstrate that GA2-oxidase 7 gene is a novel CBF3 regulon. Meanwhile, DELLAs contribute to cold induction of CBF1, -2, -3 genes through interaction with jasmonate (JA) signaling. We conclude that CBF3 promotes DELLAs accumulation through repressing GA biosynthesis and DELLAs positively regulate CBF3 involving JA signaling. CBFs and DELLAs collaborate to retard plant growth in response to low temperature.
authors.affiliation: State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Mingqi
authors.initials: M
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Hu
authors.initials: H
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Donghui
authors.initials: D
authors.lastname: Wei
authors.affiliation: State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Hong
authors.initials: H
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Genetic Engineering, Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai 200433, People's Republic of China.
authors.forename: Juan
authors.initials: J
authors.lastname: Lin
mesh_terms: D017360:Arabidopsis / Q000254:growth & development / Q000378:metabolism*; D029681:Arabidopsis Proteins / Q000235:genetics / Q000378:metabolism*; D003080:Cold Temperature; D003517:Cyclopentanes / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D005875:Gibberellins / Q000378:metabolism; D018613:Microscopy, Confocal; D006899:Mixed Function Oxygenases / Q000235:genetics / Q000378:metabolism; D054883:Oxylipins / Q000378:metabolism; D011401:Promoter Regions, Genetic; D015398:Signal Transduction; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism*
chemical_list: D029681:Arabidopsis Proteins; D003517:Cyclopentanes; C114578:DREB1A protein, Arabidopsis; C109555:GAI protein, Arabidopsis; D005875:Gibberellins; D054883:Oxylipins; D014157:Transcription Factors; C011006:jasmonic acid; D006899:Mixed Function Oxygenases; C499575:AtGA2ox7 protein, Arabidopsis