{"title":"Revalidation of the ICE1–CBF Regulatory Model in Arabidopsis Cold Stress Response","authors":"Jihyeon Park, Jae-Hoon Jung","doi":"10.1007/s12374-024-09440-w","DOIUrl":null,"url":null,"abstract":"<p>Plants encountering cold stress undergo physiological adaptations crucial for acquiring freezing tolerance, involving the transcriptional activation of genes encoding C-repeat binding factors (CBFs). Inducer of CBF expression 1 (ICE1) has long been acknowledged as a master regulator in the cold response, positively modulating the expression of cold-inducible <i>CBF</i> genes. However, recent studies that ICE1 is not involved in the regulation of <i>CBF</i> genes have challenged this established notion, prompting a critical reevaluation of the ICE1-CBF regulatory model. To address this controversy, <i>ice1-2</i> mutants were germinated on media containing 1% glucose and grown under short periodic conditions, ensuring comparable growth to wild-type (WT) plants before cold treatment. Surprisingly, our modified growth conditions revealed no discernible differences in the cold induction of <i>CBF</i> genes and their downstream targets between WT plants and <i>ice1-2</i> mutants. Moreover, cold-induced degradation of ICE1, mediated by the E3 ubiquitin ligase high expression of osmotically-responsive genes 1 (HOS1), was notably absent in two different <i>ICE1</i> transgenic plants. Consistent with this, cold-responsive gene expression profiling showed no difference between WT plants and <i>hos1</i> mutants. All our data strongly suggest that the HOS1-ICE1 regulatory module does not play a role in the cold regulation of the <i>CBF</i> signaling pathway in <i>Arabidopsis</i>.</p>","PeriodicalId":16762,"journal":{"name":"Journal of Plant Biology","volume":"7 1","pages":""},"PeriodicalIF":2.2000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Plant Biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1007/s12374-024-09440-w","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
引用次数: 0
Abstract
Plants encountering cold stress undergo physiological adaptations crucial for acquiring freezing tolerance, involving the transcriptional activation of genes encoding C-repeat binding factors (CBFs). Inducer of CBF expression 1 (ICE1) has long been acknowledged as a master regulator in the cold response, positively modulating the expression of cold-inducible CBF genes. However, recent studies that ICE1 is not involved in the regulation of CBF genes have challenged this established notion, prompting a critical reevaluation of the ICE1-CBF regulatory model. To address this controversy, ice1-2 mutants were germinated on media containing 1% glucose and grown under short periodic conditions, ensuring comparable growth to wild-type (WT) plants before cold treatment. Surprisingly, our modified growth conditions revealed no discernible differences in the cold induction of CBF genes and their downstream targets between WT plants and ice1-2 mutants. Moreover, cold-induced degradation of ICE1, mediated by the E3 ubiquitin ligase high expression of osmotically-responsive genes 1 (HOS1), was notably absent in two different ICE1 transgenic plants. Consistent with this, cold-responsive gene expression profiling showed no difference between WT plants and hos1 mutants. All our data strongly suggest that the HOS1-ICE1 regulatory module does not play a role in the cold regulation of the CBF signaling pathway in Arabidopsis.
期刊介绍:
Journal of Plant Biology, an official publication of the Botanical Society of Korea, is an international journal devoted to basic researches in biochemistry, cellular biology, development, ecology, genetics, molecular biology, physiology, and systematics of plants.
The Journal publishes the following categories of paper:
Original articles -- For publication in Journal of Plant Biology the manuscript must provide a significant new contribution to our understanding of plants. All areas of plant biology are welcome. No limit on the length, but a concise presentation is encouraged.
Reviews -- Invited by the EiC.
Brief Communications -- Concise but independent report representing significant contribution to plant science.
The Botanical Society of Korea was founded on November 30, 1957 to promote studies, disseminate and exchange information on the field of plant biology. The first issue of The Korean Journal of Botany, the official publication of the society, was published on April 1, 1958. It was published twice a year, but quarterly from 5th volume in 1962. In 1994, it was renamed to Journal of Plant Biology and published in English since 1996. The journal entered its 50th year of publication in 2007.