The DELLA-CONSTANS Transcription Factor Cascade Integrates Gibberellic Acid and Photoperiod Signaling to Regulate Flowering

CORC > 西双版纳热带植物园 > 中国科学院西双版纳热带植物园 > 植物分子生物学研究组

	The DELLA-CONSTANS Transcription Factor Cascade Integrates Gibberellic Acid and Photoperiod Signaling to Regulate Flowering
	Yu, Diqiu; Hu, Yanru
刊名	PLANT PHYSIOLOGY
	2016
卷号	172 期号:1 页码:479-488
ISSN号	0032-0889
中文摘要	Gibberellin (GA) and photoperiod pathways have recently been demonstrated to collaboratively modulate flowering under long days (LDs). However, the molecular mechanisms underlying this collaboration remain largely unclear. In this study, we found that GA-induced expression of FLOWERING LOCUS T (FT) under LDs was dependent on CONSTANS (CO), a critical transcription factor positively involved in photoperiod signaling. Mechanistic investigation revealed that DELLA proteins, a group of crucial repressors in GA signaling, physically interacted with CO. The DELLA-CO interactions repressed the transcriptional function of CO protein. Genetic analysis demonstrated that CO acts downstream of DELLA proteins to regulate flowering. Disruption of CO rescued the earlier flowering phenotype of the gai-t6 rga-t2 rgl1-1 rgl2-1 mutant (dellap), while a gain-of-function mutation in GA INSENSITIVE (GAI, a member of the DELLA gene) repressed the earlier flowering phenotype of CO-overexpressing plants. In addition, the accumulation of DELLA proteins and mRNAs was rhythmic, and REPRESSOR OF GA1-3 protein was noticeably decreased in the long-day afternoon, a time when CO protein is abundant. Collectively, these results demonstrate that the DELLA-CO cascade inhibits CO/FT-mediated flowering under LDs, which thus provide evidence to directly integrate GA and photoperiod signaling to synergistically modulate flowering under LDs.
学科主题	Plant Sciences
原文出处	10.1104/pp.16.00891
语种	英语
公开日期	2017-06-06
内容类型	期刊论文
源URL	[http://ir.xtbg.org.cn/handle/353005/10448]
专题	西双版纳热带植物园_植物分子生物学研究组西双版纳热带植物园_2012年后新成立研究组
推荐引用方式 GB/T 7714	Yu, Diqiu,Hu, Yanru. The DELLA-CONSTANS Transcription Factor Cascade Integrates Gibberellic Acid and Photoperiod Signaling to Regulate Flowering[J]. PLANT PHYSIOLOGY,2016,172(1):479-488.
APA	Yu, Diqiu,&Hu, Yanru.(2016).The DELLA-CONSTANS Transcription Factor Cascade Integrates Gibberellic Acid and Photoperiod Signaling to Regulate Flowering.PLANT PHYSIOLOGY,172(1),479-488.
MLA	Yu, Diqiu,et al."The DELLA-CONSTANS Transcription Factor Cascade Integrates Gibberellic Acid and Photoperiod Signaling to Regulate Flowering".PLANT PHYSIOLOGY 172.1(2016):479-488.