Abstract
Plants are responsive to temperature, and some species can distinguish differences of 1°C. In $\textit{Arabidopsis}$, warmer temperature accelerates flowering and increases elongation growth (thermomorphogenesis). However, the mechanisms of temperature perception are largely unknown. We describe a major thermosensory role for the phytochromes (red light receptors) during the night. Phytochrome null plants display a constitutive warm-temperature response, and consistent with this, we show in this background that the warm-temperature transcriptome becomes derepressed at low temperatures. We found that phytochrome B (phyB) directly associates with the promoters of key target genes in a temperature-dependent manner. The rate of phyB inactivation is proportional to temperature in the dark, enabling phytochromes to function as thermal timers that integrate temperature information over the course of the night.
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Claims 8
Claim · model-written summary
Warmer temperature accelerates flowering in Arabidopsis.
- Taxon
- Arabidopsis
Arabidopsise0 - Treatment
- warmer temperaturee0
- Outcome
- floweringe0
- Direction
- acceleratese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“In $\textit{Arabidopsis}$, warmer temperature accelerates flowering”
Claim · model-written summary
Warmer temperature increases elongation growth in Arabidopsis.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- warmer temperaturee0
- Outcome
- elongation growthe0
- Direction
- increasese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“warmer temperature accelerates flowering and increases elongation growth”
t0“Arabidopsis”
Claim · model-written summary
Phytochromes have a major thermosensory role at night.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- phytochromese0
- Outcome
- thermosensory rolee0
- Qualifier
- during the nighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a major thermosensory role for the phytochromes (red light receptors) during the night”
t0“Arabidopsis”
Claim · model-written summary
Phytochrome null plants show a constitutive warm-temperature response.
- Taxon
- ArabidopsisArabidopsist0
- Material
- Phytochrome null plantse0
- Outcome
- constitutive warm-temperature responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Phytochrome null plants display a constitutive warm-temperature response”
t0“Arabidopsis”
Claim · model-written summary
The warm-temperature transcriptome is derepressed at low temperatures in phytochrome null plants.
- Taxon
- ArabidopsisArabidopsist0
- Outcome
- warm-temperature transcriptomee0
- Direction
- derepressede0
- Qualifier
- at low temperaturese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in this background that the warm-temperature transcriptome becomes derepressed at low temperatures”
t0“Arabidopsis”
Claim · model-written summary
PhyB associates with target gene promoters in a temperature-dependent manner.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- phytochrome B (phyB)e0
- Outcome
- directly associates with the promoters of key target genese0
- Qualifier
- temperature-dependent mannere0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“phytochrome B (phyB) directly associates with the promoters of key target genes in a temperature-dependent manner”
t0“Arabidopsis”
Claim · model-written summary
PhyB inactivation rate is proportional to temperature in darkness.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- phyBe0
- Outcome
- rate of phyB inactivatione0
- Qualifier
- in the darke0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The rate of phyB inactivation is proportional to temperature in the dark”
t0“Arabidopsis”
Claim · model-written summary
Phytochromes act as thermal timers integrating temperature over the night.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- phytochromese0
- Outcome
- thermal timerse0
- Qualifier
- over the course of the nighte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“enabling phytochromes to function as thermal timers that integrate temperature information over the course of the night”
t0“Arabidopsis”