Abstract
The ability to withstand environmental temperature variation is essential for plant survival. Former studies in Arabidopsis revealed that light signalling pathways had a potentially unique role in shielding plant growth and development from seasonal and daily fluctuations in temperature. In this paper we describe the molecular circuitry through which the light receptors cry1 and phyB buffer the impact of warm ambient temperatures. We show that the light signalling component HFR1 acts to minimise the potentially devastating effects of elevated temperature on plant physiology. Light is known to stabilise levels of HFR1 protein by suppressing proteasome-mediated destruction of HFR1. We demonstrate that light-dependent accumulation and activity of HFR1 are highly temperature dependent. The increased potency of HFR1 at warmer temperatures provides an important restraint on PIF4 that drives elongation growth. We show that warm ambient temperatures promote the accumulation of phosphorylated PIF4. However, repression of PIF4 activity by phyB and cry1 (via HFR1) is critical for controlling growth and maintaining physiology as temperatures rise. Loss of this light-mediated restraint has severe consequences for adult plants which have greatly reduced biomass.
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Claims 7
Claim · model-written summary
HFR1 minimized effects of elevated temperature on plant physiology.
- Taxon
- Arabidopsis
Arabidopsise1 - Treatment
- elevated temperaturee0
- Gene
- HFR1e0
- Outcome
- plant physiologye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HFR1 acts to minimise the potentially devastating effects of elevated temperature on plant physiology”
e1“Former studies in Arabidopsis”
Claim · model-written summary
Light-dependent HFR1 accumulation and activity were strongly temperature dependent.
- Taxon
- ArabidopsisArabidopsise1
- Treatment
- temperaturee0
- Gene
- HFR1e0
- Outcome
- accumulation and activity of HFR1e0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“light-dependent accumulation and activity of HFR1 are highly temperature dependent”
e1“Former studies in Arabidopsis”
Claim · model-written summary
HFR1 had greater potency at warmer temperatures and restrained PIF4-driven elongation.
- Taxon
- ArabidopsisArabidopsise1
- Treatment
- warmer temperaturese0
- Gene
- HFR1e0
- Outcome
- elongation growthe0
- Direction
- increasede0
- Qualifier
- restraint on PIF4e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The increased potency of HFR1 at warmer temperatures provides an important restraint on PIF4 that drives elongation growth”
e1“Former studies in Arabidopsis”
Claim · model-written summary
Warm ambient temperatures promoted phosphorylated PIF4 accumulation.
- Taxon
- ArabidopsisArabidopsise1
- Treatment
- warm ambient temperaturese0
- Gene
- PIF4e0
- Outcome
- accumulation of phosphorylated PIF4e0
- Direction
- promotee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“warm ambient temperatures promote the accumulation of phosphorylated PIF4”
e1“Former studies in Arabidopsis”
Claim · model-written summary
phyB and cry1 repression of PIF4 through HFR1 controlled growth as temperatures rose.
- Taxon
- ArabidopsisArabidopsise1
- Gene
- PIF4e0
- Outcome
- controlling growthe0
- Qualifier
- via HFR1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“repression of PIF4 activity by phyB and cry1 (via HFR1) is critical for controlling growth and maintaining physiology as temperatures rise”
e1“Former studies in Arabidopsis”
Claim · model-written summary
phyB and cry1 repression of PIF4 through HFR1 maintained physiology as temperatures rose.
- Taxon
- ArabidopsisArabidopsise1
- Gene
- PIF4e0
- Outcome
- maintaining physiologye0
- Qualifier
- via HFR1e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“repression of PIF4 activity by phyB and cry1 (via HFR1) is critical for controlling growth and maintaining physiology as temperatures rise”
e1“Former studies in Arabidopsis”
Claim · model-written summary
Loss of light-mediated restraint greatly reduced adult plant biomass.
- Taxon
- ArabidopsisArabidopsise1
- Organ / stage
- adult plantse0
- Treatment
- Loss of this light-mediated restrainte0
- Outcome
- biomasse0
- Direction
- greatly reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Loss of this light-mediated restraint has severe consequences for adult plants which have greatly reduced biomass”
e1“Former studies in Arabidopsis”
The same questions in other papers
light · growth · ArabidopsisResults differ
16 papers in the same direction as this paper · 27 in the opposite direction
- positive
- positive
- no effect
40 papers more in this group
See all 44 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.