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Genome-wide analysis of ALDH gene family in jujube and identification of ZjALDH3F3 for its important role in high-temperature tolerance

文献类型： 外文期刊

作者： Li, Lili 1 ; Yang, Lei 1 ; Fan, Dingyu 1 ; Jin, Juan 1 ; Xiaokelaiti, Subina 1 ; He, Yanjun 2 ; Hao, Qing 1 ;

作者机构： 1.Xinjiang Acad Agr Sci, Inst Hort Crops, State Key Lab Genet Improvement & Germplasm Innova, Key Lab Genome Res & Genet Improvement Xinjiang Ch, Urumqi 830091, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Vegetables, Hangzhou 310021, Peoples R China

关键词： Overexpression; Heat tolerance; Promoter; Jujube

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：6.5； 五年影响因子：6.4 ）

ISSN： 0981-9428

年卷期： 2023 年 205 卷

页码：

收录情况： SCI

摘要： Aldehyde dehydrogenases (ALDHs) are NAD(P)-dependent enzymes that oxidize aliphatic and aromatic aldehydes. They play crucial roles in various biological processes and plant responses to stress. The impact of high temperatures on jujube quality and yield has been well documented. Nevertheless, the involvement of ALDHs in the response to heat stress remains poorly understood. This study aimed to identify ZjALDHs in the jujube genome (Ziziphus jujuba var. spinosa) and conducted in silico analyses. Phylogenetic analyses indicated that ALDHs in plants, including jujube, can be divided into ten families, and members from the same family share conserved gene and protein structures. Quantitative real-time PCR (qRT-PCR) and beta-glucuronidase (GUS) histochemical staining were used to analyze the expression patterns of ZjALDHs in response to elevated temperatures. We identified a ZjALDH (ZjALDH3F3) gene displaying a significant upregulation and down-regulation, respectively in heat-resistant (HR) and heat-sensitive (HS) jujube in response to heat treatments. Such specific responses are probably attributed to the different heat-responsive cis-elements of ZjALDH3F3 in HR and HS jujubes. ZjALDH3F3 over-expressed in tobacco increased heat tolerance, as evidenced by the reduced accumulation of reactive oxygen species (ROS) and elevated activity of antioxidant enzymes. The qRT-PCR results indicated that the expression of antioxidant enzymes, abscisic acid (ABA), and stress-responsive genes was enhanced in transgenic tobacco. This study sheds novel light on the function of ZjALDHs in heat resistance of jujube.

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