A C2H2-type zinc finger protein ZAT12 of Poncirus trifoliata acts downstream of CBF1 to regulate cold tolerance
文献类型： 外文期刊
作者： Zhang, Yang 1 ; Xiao, Wei 1 ; Wang, Min 3 ; Khan, Madiha 1 ; Liu, Ji-Hong 1 ;
作者机构： 1.Huazhong Agr Univ, Coll Hort & Forestry Sci, Natl Key Lab Germplasm Innovat & Utilizat Hort Cro, Wuhan 430070, Peoples R China
2.Hubei Acad Agr Sci, Inst Fruit & Tea, Hubei Key Lab Germplasm Innovat & Utilizat Fruit T, Wuhan 430064, Peoples R China
3.Gannan Normal Univ, Coll Life Sci, Ganzhou 341000, Peoples R China
关键词： Poncirus trifoliata; cold stress; transcription factors; CBF regulon
期刊名称：PLANT JOURNAL （ 影响因子：7.2； 五年影响因子：7.9 ）
ISSN： 0960-7412
年卷期： 2023 年
页码：
收录情况： SCI
摘要： The Cys2/His2 (C2H2)-type zinc finger family has been reported to regulate multiple aspects of plant development and abiotic stress response. However, the role of C2H2-type zinc finger proteins in cold tolerance remains largely unclear. Through RNA-sequence analysis, a cold-responsive zinc finger protein, named as PtrZAT12, was identified and isolated from trifoliate orange (Poncirus trifoliata L. Raf.), a cold-hardy plant closely related to citrus. Furthermore, we found that PtrZAT12 was markedly induced by various abiotic stresses, especially cold stress. PtrZAT12 is a nuclear protein, and physiological analysis suggests that overexpression of PtrZAT12 conferred enhanced cold tolerance in transgenic tobacco (Nicotiana tabacum) plants, while knockdown of PtrZAT12 by virus-induced gene silencing (VIGS) increased the cold sensitivity of trifoliate orange and repressed expression of genes involved in stress tolerance. The promoter of PtrZAT12 harbors a DRE/CRT cis-acting element, which was verified to be specifically bound by PtrCBF1 (Poncirus trifoliata C-repeat BINDING FACTOR1). VIGS-mediated silencing of PtrCBF1 reduced the relative expression levels of PtrZAT12 and decreased the cold resistance of trifoliate orange. Based on these results, we propose that PtrZAT12 is a direct target of CBF1 and plays a positive role in modulation of cold stress tolerance. The knowledge gains new insight into a regulatory module composed of CBF1-ZAT12 in response to cold stress and advances our understanding of cold stress response in plants.
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