PMID- 24335334
OWN - NLM
STAT- MEDLINE
DCOM- 20141013
LR  - 20220409
IS  - 1532-2548 (Electronic)
IS  - 0032-0889 (Print)
IS  - 0032-0889 (Linking)
VI  - 164
IP  - 2
DP  - 2014 Feb
TI  - Both PHYTOCHROME RAPIDLY REGULATED1 (PAR1) and PAR2 promote seedling 
      photomorphogenesis in multiple light signaling pathways.
PG  - 841-52
LID - 10.1104/pp.113.227231 [doi]
AB  - 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.
FAU - Zhou, Peng
AU  - Zhou P
AD  - Institute of Crop Science , Chinese Academy of Agricultural Sciences, Beijing 
      100081, China.
FAU - Song, Meifang
AU  - Song M
FAU - Yang, Qinghua
AU  - Yang Q
FAU - Su, Liang
AU  - Su L
FAU - Hou, Pei
AU  - Hou P
FAU - Guo, Lin
AU  - Guo L
FAU - Zheng, Xu
AU  - Zheng X
FAU - Xi, Yulin
AU  - Xi Y
FAU - Meng, Fanhua
AU  - Meng F
FAU - Xiao, Yang
AU  - Xiao Y
FAU - Yang, Li
AU  - Yang L
FAU - Yang, Jianping
AU  - Yang J
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20131212
PL  - United States
TA  - Plant Physiol
JT  - Plant physiology
JID - 0401224
RN  - 0 (Arabidopsis Proteins)
RN  - 0 (Basic Helix-Loop-Helix Transcription Factors)
RN  - 0 (PAR1 protein, Arabidopsis)
RN  - 0 (PAR2 protein, Arabidopsis)
SB  - IM
MH  - Arabidopsis/*growth & development/metabolism/radiation effects
MH  - Arabidopsis Proteins/*metabolism
MH  - Basic Helix-Loop-Helix Transcription Factors/*metabolism
MH  - Etiolation/radiation effects
MH  - Hypocotyl/growth & development/radiation effects
MH  - *Light
MH  - Light Signal Transduction/*radiation effects
MH  - Models, Biological
MH  - Morphogenesis/*radiation effects
MH  - Mutation/genetics
MH  - Phenotype
MH  - Proteolysis/radiation effects
MH  - RNA Interference/radiation effects
MH  - Seedlings/*growth & development/metabolism/radiation effects
PMC - PMC3912110
EDAT- 2013/12/18 06:00
MHDA- 2014/10/14 06:00
PMCR- 2013/12/12
CRDT- 2013/12/17 06:00
PHST- 2013/12/17 06:00 [entrez]
PHST- 2013/12/18 06:00 [pubmed]
PHST- 2014/10/14 06:00 [medline]
PHST- 2013/12/12 00:00 [pmc-release]
AID - pp.113.227231 [pii]
AID - 227231 [pii]
AID - 10.1104/pp.113.227231 [doi]
PST - ppublish
SO  - Plant Physiol. 2014 Feb;164(2):841-52. doi: 10.1104/pp.113.227231. Epub 2013 Dec 
      12.