Both PHYTOCHROME RAPIDLY REGULATED1 (PAR1) and PAR2 Promote Seedling Photomorphogenesis in Multiple Light Signaling Pathways

doi:10.1104/pp.113.227231

	Both PHYTOCHROME RAPIDLY REGULATED1 (PAR1) and PAR2 Promote Seedling Photomorphogenesis in Multiple Light Signaling Pathways
	Zhou, Peng 1; Song, Meifang 1; Yang, Qinghua 3; Su, Liang 1; Hou, Pei 1; Guo, Lin 1; Zheng, Xu 1,2; Xi, Yulin 1,2; Meng, Fanhua 1; Xiao, Yang 2
刊名	PLANT PHYSIOLOGY
	2014
卷号	164 期号:2 页码:841-852
ISSN号	0032-0889
DOI	10.1104/pp.113.227231
通讯作者	Zhou, Peng
英文摘要	Arabidopsis (Arabidopsis thaliana) seedlings undergo photomorphogenesis in the light and etiolation in the dark. Light-activated photoreceptors transduce the light signals through a series of photomorphogenesis promoting or repressing factors to modulate many developmental processes in plants, such as photomorphogenesis and shade avoidance. CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1) is a conserved RING finger E3 ubiquitin ligase, which mediates degradation of several photomorphogenesis promoting factors, including ELONGATED HYPOCOTYL5 (HY5) and LONG HYPOCOTYL IN FAR-RED1 (HFR1), through a 26S proteasome-dependent pathway. PHYTOCHROME RAPIDLY REGULATED1 (PAR1) was first detected as an early repressed gene in both phytochrome A (phyA)-mediated far-red and phyB-mediated red signaling pathways, and subsequent studies showed that both PAR1 and PAR2 are negative factors of shade avoidance in Arabidopsis. However, the role of PAR1 and PAR2 in seedling deetiolation, and their relationships with other photomorphogenesis promoting and repressing factors are largely unknown. Here, we confirmed that both PAR1 and PAR2 redundantly enhance seedling deetiolation in multiple photoreceptor signaling pathways. Their transcript abundances are repressed by phyA, phyB, and cryptochrome1 under far-red, red, and blue light conditions, respectively. Both PAR1 and PAR2 act downstream of COP1, and COP1 mediates the degradation of PAR1 and PAR2 through the 26S proteasome pathway. Both PAR1 and PAR2 act in a separate pathway from HY5 and HFR1 under different light conditions, except for sharing in the same pathway with HFR1 under far-red light. Together, our results substantiate that PAR1 and PAR2 are positive factors functioning in multiple photoreceptor signaling pathways during seedling deetiolation.
学科主题	Plant Sciences
语种	英语
出版者	AMER SOC PLANT BIOLOGISTS
WOS记录号	WOS:000331132300027
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/4928]
专题	作物科学研究所_遗传育种系
作者单位	1.Chinese Acad Agr Sci, Inst Crop Sci, Beijing 100081, Peoples R China 2.Chinese Acad Agr Sci, Grad Sch, Beijing 100081, Peoples R China 3.Henan Agr Univ, Coll Agron, Zhengzhou 450002, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Peng,Song, Meifang,Yang, Qinghua,et al. Both PHYTOCHROME RAPIDLY REGULATED1 (PAR1) and PAR2 Promote Seedling Photomorphogenesis in Multiple Light Signaling Pathways[J]. PLANT PHYSIOLOGY,2014,164(2):841-852.
APA	Zhou, Peng.,Song, Meifang.,Yang, Qinghua.,Su, Liang.,Hou, Pei.,...&Yang, Jianping.(2014).Both PHYTOCHROME RAPIDLY REGULATED1 (PAR1) and PAR2 Promote Seedling Photomorphogenesis in Multiple Light Signaling Pathways.PLANT PHYSIOLOGY,164(2),841-852.
MLA	Zhou, Peng,et al."Both PHYTOCHROME RAPIDLY REGULATED1 (PAR1) and PAR2 Promote Seedling Photomorphogenesis in Multiple Light Signaling Pathways".PLANT PHYSIOLOGY 164.2(2014):841-852.