Abstract
Heat stress (HS) caused by ambient high temperature poses a threat to plants. In the natural and agricultural environment, plants often encounter repeated and changeable HS. Moderate HS primes plants to establish a molecular 'thermomemory' that enables plants to withstand a later-and possibly more extreme-HS attack. Recent years, brassinosteroids (BRs) have been implicated in HS response, whereas the information is lacking on whether BRs signal transduction modulates thermomemory. Here, we uncover the positive role of BRs signalling in thermomemory of Arabidopsis thaliana. Heat priming induces de novo synthesis and nuclear accumulation of BRI1-Ethyl methyl sulfon-SUPPRESSOR (BES1), which is the key regulator of BRs signalling. BRs promote the accumulation of dephosphorylated BES1 during memory phase, and stoppage of BRs synthesis impairs dephosphorylation. During HS memory, BES1 is required to maintain sustained induction of HS memory genes and directly targets APX2 and HSFA3 for activation. In summary, our results reveal a BES1-required, BRs-enhanced transcriptional control module of thermomemory in Arabidopsis thaliana.
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Claims 6
Claim · model-written summary
BR signalling positively contributes to Arabidopsis thermomemory.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Compound
- BRse0
- Outcome
- thermomemorye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here, we uncover the positive role of BRs signalling in thermomemory of Arabidopsis thaliana.”
Claim · model-written summary
Heat priming induces BES1 synthesis and nuclear accumulation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- Heat priminge0
- Gene
- BRI1-Ethyl methyl sulfon-SUPPRESSORe0
- Outcome
- de novo synthesis and nuclear accumulatione0
- Direction
- inducese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Heat priming induces de novo synthesis and nuclear accumulation of BRI1-Ethyl methyl sulfon-SUPPRESSOR (BES1), which is the key regulator of BRs signalling.”
t0“Arabidopsis thaliana”
Claim · model-written summary
BRs promote dephosphorylated BES1 accumulation during memory.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- BRse0
- Gene
- BES1e0
- Outcome
- accumulation of dephosphorylated BES1e0
- Direction
- promotee0
- Qualifier
- during memory phasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BRs promote the accumulation of dephosphorylated BES1 during memory phase”
t0“Arabidopsis thaliana”
Claim · model-written summary
Stopping BR synthesis impairs dephosphorylation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- stoppage of BRs synthesise0
- Outcome
- dephosphorylatione0
- Direction
- impairse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“stoppage of BRs synthesis impairs dephosphorylation.”
t0“Arabidopsis thaliana”
Claim · model-written summary
BES1 is required for sustained induction of heat stress memory genes.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- BES1e0
- Outcome
- sustained induction of HS memory genese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“During HS memory, BES1 is required to maintain sustained induction of HS memory genes”
t0“Arabidopsis thaliana”
Claim · model-written summary
BES1 directly targets APX2 and HSFA3 for activation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Gene
- BES1e0
- Outcome
- activatione0
- Qualifier
- directly targets APX2 and HSFA3e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BES1 is required to maintain sustained induction of HS memory genes and directly targets APX2 and HSFA3 for activation.”
t0“Arabidopsis thaliana”
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