Abstract
Key message
Under cold conditions, StICE1 enhances plant cold tolerance by upregulating StLTI6A expression to maintain the cell membrane stability.
Abstract
Cold stress affects potato plants growth and development, crop productivity and quality. The ICE-CBF-COR regulatory cascade is the well-known pathway in response to cold stress in plants. ICE1, as a MYC-like bHLH transcription factor, can regulate the expressions of CBFs. However, whether ICE1 could regulate other genes still need to be explored. Our results showed that overexpressing ICE1 from potato in Arabidopsis thaliana could enhance plant cold tolerance. Under cold stress, overexpressed StICE1 in plants improved the stability of cell membrane, enhanced scavenging capacity of reactive oxygen species and increased expression levels of CBFs and COR genes. Furthermore, StICE1 could bind to the promoter of StLTI6A gene, which could maintain the stability of the cell membrane, to upregulate StLTI6A expression under cold conditions. Our findings revealed that StICE1 could directly regulate StLTI6A, CBF and COR genes expression to response to cold stress.
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Data supporting the findings of this work are available within the article and its Supporting Information files.
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This research was funded by the project EPPN2020-OPVaI-VA-ITMS313011T813 and VEGA 1/0589/19.
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All authors contributed to the study conception and design. XY and XW conceived and designed the experiment. XW, QS and HG executed the experiment, analyzed the data and interpreted the results. XW, QS, YL, MB and XY wrote the manuscript. All authors commented on previous versions of the manuscript, read and approved the final manuscript.
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Wang, X., Song, Q., Guo, H. et al. StICE1 enhances plant cold tolerance by directly upregulating StLTI6A expression. Plant Cell Rep 42, 197–210 (2023). https://doi.org/10.1007/s00299-022-02949-9
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DOI: https://doi.org/10.1007/s00299-022-02949-9