Rice Homeobox Transcription Factor HOX1a Positively Regulates Gibberellin Responses by Directly Suppressing EL1

doi:10.1111/j.1744-7909.2011.01075.x

	Rice Homeobox Transcription Factor HOX1a Positively Regulates Gibberellin Responses by Directly Suppressing EL1
	Wen Biqing; Xing Meiqing; Zhang Hua; Dai Cheng; Xue Hongwei
刊名	Journal of Integrative Plant Biology
	2011
卷号	53 期号:11 页码:869
关键词	HOMEODOMAIN PROTEIN DNA-BINDING ANTENNAPEDIA HOMEODOMAIN SIGNALING PATHWAY NMR-SPECTROSCOPY SHOOT MERISTEM GENE ENCODES ARABIDOPSIS BIOSYNTHESIS METABOLISM EL1 giberellin giberellin signaling HOX1a homeobox
ISSN号	1672-9072
DOI	10.1111/j.1744-7909.2011.01075.x
英文摘要	Homeobox transcription factors are involved in various aspects of plant development, including maintenance of the biosynthesis and signaling pathways of different hormones. However, few direct targets of homeobox proteins have been identified. We here show that overexpression of rice homeobox gene HOX1a resulted in enhanced gibberellin (GA) response, indicating a positive effect of HOX1a in GA signaling. HOX1a is induced by GA and encodes a homeobox transcription factor with transcription repression activity. In addition, HOX1a suppresses the transcription of early flowering1 (EL1), a negative regulator of GA signaling, and further electrophoretic mobility shift assay and chromatin immunoprecipitation analysis revealed that HOX1a directly bound to the promoter region of EL1 to suppress its expression and stimulate GA signaling. These results demonstrate that HOX1a functions as a positive regulator of GA signaling by suppressing EL1, providing informative hints on the study of GA signaling.
资助项目	[Chinese Academy of Sciences] ; [National Natural Science Foundation of China] ; [Ministry of Agriculture of China for Transgenic Research]
语种	英语
内容类型	期刊论文
源URL	[http://119.78.100.183/handle/2S10ELR8/283021]
专题	中国科学院上海药物研究所
作者单位	中国科学院上海药物研究所
推荐引用方式 GB/T 7714	Wen Biqing,Xing Meiqing,Zhang Hua,et al. Rice Homeobox Transcription Factor HOX1a Positively Regulates Gibberellin Responses by Directly Suppressing EL1[J]. Journal of Integrative Plant Biology,2011,53(11):869.
APA	Wen Biqing,Xing Meiqing,Zhang Hua,Dai Cheng,&Xue Hongwei.(2011).Rice Homeobox Transcription Factor HOX1a Positively Regulates Gibberellin Responses by Directly Suppressing EL1.Journal of Integrative Plant Biology,53(11),869.
MLA	Wen Biqing,et al."Rice Homeobox Transcription Factor HOX1a Positively Regulates Gibberellin Responses by Directly Suppressing EL1".Journal of Integrative Plant Biology 53.11(2011):869.