PMID- 23933882
OWN - NLM
STAT- MEDLINE
DCOM- 20140422
LR  - 20211021
IS  - 1532-298X (Electronic)
IS  - 1040-4651 (Print)
IS  - 1040-4651 (Linking)
VI  - 25
IP  - 8
DP  - 2013 Aug
TI  - Heat shock-induced fluctuations in clock and light signaling enhance phytochrome 
      B-mediated Arabidopsis deetiolation.
PG  - 2892-906
LID - 10.1105/tpc.113.114306 [doi]
AB  - Moderately warm constant ambient temperatures tend to oppose light signals in the 
      control of plant architecture. By contrast, here we show that brief heat shocks 
      enhance the inhibition of hypocotyl growth induced by light perceived by 
      phytochrome B in deetiolating Arabidopsis thaliana seedlings. In darkness, daily 
      heat shocks transiently increased the expression of pseudo-response regulator7 
      (PRR7) and PRR9 and markedly enhanced the amplitude of the rhythms of late 
      elongated hypocotyl (LHY) and circadian clock associated1 (CCA1) expression. In 
      turn, these rhythms gated the hypocotyl response to red light, in part by 
      changing the expression of phytochrome interacting FACTOR4 (PIF4) and PIF5. After 
      light exposure, heat shocks also reduced the nuclear abundance of constitutive 
      photomorphogenic1 (COP1) and increased the abundance of its target elongated 
      hypocotyl5 (HY5). The synergism between light and heat shocks was deficient in 
      the prr7 prr9, lhy cca1, pif4 pif5, cop1, and hy5 mutants. The evening element 
      (binding site of LHY and CCA1) and G-box promoter motifs (binding site of PIFs 
      and HY5) were overrepresented among genes with expression controlled by both heat 
      shock and red light. The heat shocks experienced by buried seedlings approaching 
      the surface of the soil prepare the seedlings for the impending exposure to light 
      by rhythmically lowering LHY, CCA1, PIF4, and PIF5 expression and by enhancing 
      HY5 stability.
FAU - Karayekov, Elizabeth
AU  - Karayekov E
AD  - IFEVA, Facultad de Agronomia, Universidad de Buenos Aires and the National 
      Research Council of Argentina (CONICET), 1417 Buenos Aires, Argentina.
FAU - Sellaro, Romina
AU  - Sellaro R
FAU - Legris, Martina
AU  - Legris M
FAU - Yanovsky, Marcelo J
AU  - Yanovsky MJ
FAU - Casal, Jorge J
AU  - Casal JJ
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20130809
PL  - England
TA  - Plant Cell
JT  - The Plant cell
JID - 9208688
RN  - 0 (Arabidopsis Proteins)
RN  - 0 (PHYB protein, Arabidopsis)
RN  - 136250-22-1 (Phytochrome B)
SB  - IM
MH  - Arabidopsis/genetics/*physiology/radiation effects
MH  - Arabidopsis Proteins/*metabolism
MH  - Cell Nucleus/metabolism/radiation effects
MH  - Circadian Clocks/genetics/*radiation effects
MH  - Darkness
MH  - Etiolation/*radiation effects
MH  - Gene Expression Regulation, Plant/radiation effects
MH  - Heat-Shock Response/*radiation effects
MH  - Hot Temperature
MH  - Hypocotyl/growth & development/radiation effects
MH  - *Light
MH  - Models, Biological
MH  - Phytochrome B/*metabolism
MH  - Protein Stability/radiation effects
MH  - Seedlings/genetics/radiation effects
MH  - Signal Transduction/genetics/*radiation effects
MH  - Transcriptome/genetics/radiation effects
PMC - PMC3784587
EDAT- 2013/08/13 06:00
MHDA- 2014/04/23 06:00
PMCR- 2014/08/01
CRDT- 2013/08/13 06:00
PHST- 2013/08/13 06:00 [entrez]
PHST- 2013/08/13 06:00 [pubmed]
PHST- 2014/04/23 06:00 [medline]
PHST- 2014/08/01 00:00 [pmc-release]
AID - tpc.113.114306 [pii]
AID - 114306 [pii]
AID - 10.1105/tpc.113.114306 [doi]
PST - ppublish
SO  - Plant Cell. 2013 Aug;25(8):2892-906. doi: 10.1105/tpc.113.114306. Epub 2013 Aug 
      9.