Abstract
The inducer of cbf expression (ICE)-C-repeat binding factor/DRE binding factor1 (CBF/DREB1) transcriptional pathway plays a critical role in modulating cold stress responses in Arabidopsis thaliana. Dissecting crucial upstream regulatory signals or components of the ICE-CBF/DREB1 cascade will enhance our understanding of plant cold-tolerance mechanisms. Here, we show that jasmonate positively regulates plant responses to freezing stress in Arabidopsis. Exogenous application of jasmonate significantly enhanced plant freezing tolerance with or without cold acclimation. By contrast, blocking endogenous jasmonate biosynthesis and signaling rendered plants hypersensitive to freezing stress. Consistent with the positive role of jasmonate in freezing stress, production of endogenous jasmonate was triggered by cold treatment. In addition, cold induction of genes acting in the CBF/DREB1 signaling pathway was upregulated by jasmonate. Further investigation revealed that several jasmonate ZIM-domain (JAZ) proteins, the repressors of jasmonate signaling, physically interact with ICE1 and ICE2 transcription factors. JAZ1 and JAZ4 repress the transcriptional function of ICE1, thereby attenuating the expression of its regulon. Consistent with this, overexpression of JAZ1 or JAZ4 represses freezing stress responses of Arabidopsis. Taken together, our study provides evidence that jasmonate functions as a critical upstream signal of the ICE-CBF/DREB1 pathway to positively regulate Arabidopsis freezing tolerance.
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Claims 9
Claim · model-written summary
Exogenous jasmonate significantly enhanced freezing tolerance with or without cold acclimation.
- Taxon
- Arabidopsis
Arabidopsist0 - Treatment
- Exogenous application of jasmonatee0
- Outcome
- plant freezing tolerancee0
- Direction
- enhancede0
- Qualifier
- with or without cold acclimatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of jasmonate significantly enhanced plant freezing tolerance with or without cold acclimation”
t0“in Arabidopsis”
Claim · model-written summary
Blocking endogenous jasmonate biosynthesis and signaling made plants hypersensitive to freezing stress.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- blocking endogenous jasmonate biosynthesis and signalinge0
- Outcome
- hypersensitive to freezing stresse0
- Direction
- hypersensitivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“blocking endogenous jasmonate biosynthesis and signaling rendered plants hypersensitive to freezing stress”
t0“in Arabidopsis”
Claim · model-written summary
Cold treatment triggered endogenous jasmonate production.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- cold treatmente0
- Outcome
- production of endogenous jasmonatee0
- Direction
- triggerede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“production of endogenous jasmonate was triggered by cold treatment”
t0“in Arabidopsis”
Claim · model-written summary
Jasmonate upregulated cold induction of CBF/DREB1 pathway genes.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- jasmonatee0
- Gene
- CBF/DREB1e0
- Outcome
- cold induction of genes acting in the CBF/DREB1 signaling pathwaye0
- Direction
- upregulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cold induction of genes acting in the CBF/DREB1 signaling pathway was upregulated by jasmonate”
t0“in Arabidopsis”
Claim · model-written summary
Several JAZ proteins physically interact with ICE1 and ICE2 transcription factors.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- jasmonate ZIM-domain (JAZ) proteinse0
- Outcome
- physically interact with ICE1 and ICE2 transcription factorse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“several jasmonate ZIM-domain (JAZ) proteins, the repressors of jasmonate signaling, physically interact with ICE1 and ICE2 transcription factors”
t0“in Arabidopsis”
Claim · model-written summary
JAZ1 and JAZ4 repress ICE1 transcriptional function.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- JAZ1 and JAZ4e0
- Outcome
- transcriptional function of ICE1e0
- Direction
- represse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“JAZ1 and JAZ4 repress the transcriptional function of ICE1”
t0“in Arabidopsis”
Claim · model-written summary
JAZ1 and JAZ4 attenuate expression of the ICE1 regulon.
- Taxon
- ArabidopsisArabidopsist0
- Gene
- JAZ1 and JAZ4e0
- Outcome
- expression of its regulone0
- Direction
- attenuatinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“JAZ1 and JAZ4 repress the transcriptional function of ICE1, thereby attenuating the expression of its regulon”
t0“in Arabidopsis”
Claim · model-written summary
Overexpression of JAZ1 or JAZ4 represses freezing stress responses.
- Taxon
- ArabidopsisArabidopsise0
- Treatment
- overexpression of JAZ1 or JAZ4e0
- Gene
- JAZ1 or JAZ4e0
- Outcome
- freezing stress responsese0
- Direction
- repressese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“overexpression of JAZ1 or JAZ4 represses freezing stress responses of Arabidopsis”
Claim · model-written summary
The authors conclude that jasmonate acts upstream of ICE-CBF/DREB1 to positively regulate freezing tolerance.
- Taxon
- ArabidopsisArabidopsise0
- Gene
- ICE-CBF/DREB1e0
- Compound
- jasmonatee0
- Outcome
- Arabidopsis freezing tolerancee0
- Direction
- positively regulatee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“jasmonate functions as a critical upstream signal of the ICE-CBF/DREB1 pathway to positively regulate Arabidopsis freezing tolerance”
The same questions in other papers
jasmonic acid · tolerance: abiotic · ArabidopsisResults differ
1 in the opposite direction
- negative
jasmonic acid · molecular: expression · ArabidopsisPositive and negative results
20 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- negative
30 papers more in this group
See all 34 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.