Genome-Wide Identification and Characterization of Heat-Shock Transcription Factors in Rubber Tree

文献类型： 外文期刊

第一作者： Li, Yan

作者： Li, Yan;Li, Yan;Chen, Yueyi;Yang, Shuguang;Wu, Shaohua;Chao, Jinquan;Wang, Xinlong;Tian, Wei-Min;Li, Yan;Chen, Yueyi;Yang, Shuguang;Wu, Shaohua;Chao, Jinquan;Wang, Xinlong;Tian, Wei-Min;Yu, Wencai

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关键词： Hevea brasiliensis Muell; Arg; heat-shock transcription factor; cold stress; cold-sensitive rubber-tree clones; cold-tolerant rubber-tree clones

期刊名称：FORESTS （ 影响因子：2.633； 五年影响因子：2.804 ）

ISSN：

年卷期： 2019 年 10 卷 12 期

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收录情况： SCI

摘要： Heat-shock transcription factors (Hsfs) play a pivotal role in the response of plants to various stresses. The present study aimed to characterize the Hsf genes in the rubber tree, a primary global source of natural rubber. In this study, 30 Hsf genes were identified in the rubber tree using genome-wide analysis. They possessed a structurally conserved DNA-binding domain and an oligomerization domain. On the basis of the length of the insert region between HR-A and HR-B in the oligomerization domain, the 30 members were clustered into three classes, Classes A (18), B (10), and C (2). Members within the same class shared highly conserved gene structures and protein motifs. The background expression levels of 11 genes in cold-tolerant rubber-tree clone 93-14 were significantly higher than those in cold-sensitive rubber-tree clone Reken501, while four genes exhibited inverse expression patterns. Upon cold stress, 20 genes were significantly upregulated in 93-114. Of the upregulated genes, HbHsfA2b, HbHsfA3a, and HbHsfA7a were also significantly upregulated in three other cold-tolerant rubber-tree clones at one or more time intervals upon cold stress. Their nuclear localization was verified, and the protein-protein interaction network was predicted. This study provides a basis for dissecting Hsf function in the enhanced cold tolerance of the rubber tree.

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