Molecular Mechanism of Cold Acclimation Regulating Freezing Tolerance in Prunus mume
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ID: 315665
2026
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Abstract
Abstract The Prunus mume species has undergone a long process of domestication and introduction in China, resulting in marked differences in freezing tolerance among populations across a latitudinal gradient of approximately one thousand kilometers. However, the introduction and domestication and process is time-consuming, constraining the efficiency of species introduction. In this study, P. mume samples with the same genetic background spanning over 1,000 kilometers from north to south were selected as experimental materials. The molecular mechanisms underlying cold-acclimation-mediated freeze tolerance in P. mume were investigated using multiomics high-throughput sequencing and molecular biology techniques. The cold-acclimated plant material exhibited enhanced freezing tolerance. Cold acclimation substantially enhanced transcriptional reprogramming under cold stress, accompanied by the remodeling of chromatin states in the promoter region. A variety of cis-regulatory elements were identified in the open chromatin regions of cold-acclimated plant materials, including G-box, ABRE, and other stress-responsive elements. The bZIP transcription factor PmGBF1, as a key regulatory node, directly regulates the expression of the cold shock protein (CSP) gene PmCSL by binding to G-box elements to regulate freezing tolerance. This study reveals the molecular mechanism underlying cold acclimation mediated by the PmGBF1-PmCSL pathway in regulating P. mume freezing tolerance, providing an epigenetic theoretical basis and genetic resources for cold-acclimation breeding of freezing tolerance in woody plants.
| Reference Key |
openalex_W7163382768
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| Authors | Liu W, Haolin Liu, Xiangbo Liu, Zhoujie Yue, Jiaqi Yan, Liying Wei, H Wang, Pan Zhao, Guangya Bian, Q J Zhang, Yinran Huang, Q J Zhang, Tangchun Zheng, Ping Li |
| Journal | Plant physiology and biochemistry : PPB |
| Year | 2026 |
| DOI |
10.1093/plphys/kiag333
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| URL | |
| Keywords | Keywords not found |
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