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StICE1 enhances plant cold tolerance by directly upregulating StLTI6A expression
Xipan Wang1, Qiping Song1, Hao Guo1
1State Key Laboratory of Crop Biology, Shandong Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Taian, 271018, China.
Plant Cell Reports
|November 13, 2022
Summary
Potato StICE1 protein enhances cold tolerance by increasing StLTI6A gene expression, maintaining cell membrane stability under cold stress. This transcription factor also regulates CBF and COR genes for improved plant survival.
Area of Science:
- Plant Biology
- Molecular Biology
- Genetics
Background:
- Cold stress significantly impacts potato plant growth, yield, and quality.
- The ICE-CBF-COR pathway is a known mechanism for plant cold response.
- The role of ICE1 in regulating genes beyond CBFs requires further investigation.
Purpose of the Study:
- To investigate the function of potato StICE1 in plant cold tolerance.
- To determine if StICE1 regulates genes other than CBFs under cold conditions.
- To elucidate the molecular mechanism by which StICE1 confers cold tolerance.
Main Methods:
- Overexpression of potato StICE1 in Arabidopsis thaliana.
- Assessing plant cold tolerance, cell membrane stability, and reactive oxygen species scavenging capacity.
- Analyzing the expression levels of CBF and COR genes.
- Chromatin immunoprecipitation assays to identify StICE1 binding targets.
Main Results:
- Overexpression of StICE1 enhanced cold tolerance in Arabidopsis.
- StICE1 improved cell membrane stability and reactive oxygen species scavenging under cold stress.
- StICE1 upregulated the expression of CBF and COR genes.
- StICE1 directly binds to the promoter of StLTI6A, upregulating its expression under cold.
Conclusions:
- StICE1 enhances potato cold tolerance by upregulating StLTI6A expression, thereby maintaining cell membrane stability.
- StICE1 directly regulates StLTI6A, CBF, and COR genes in response to cold stress.
- This study reveals a novel regulatory role for StICE1 in plant cold acclimation.
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