Genome-Wide Identification and Characterization of Heat-Shock Transcription Factors in Rubber Tree
文献类型： 外文期刊
作者： Li, Yan 1 ; Yu, Wencai 4 ; Chen, Yueyi 2 ; Yang, Shuguang 2 ; Wu, Shaohua 2 ; Chao, Jinquan 2 ; Wang, Xinlong 2 ; Tian, W 1 ;
作者机构： 1.Hainan Univ, Coll Trop Crops, Haikou 570228, Hainan, Peoples R China
2.Chinese Acad Trop Agr Sci, Rubber Res Inst, Minist Agr, Key Lab Biol & Genet Resources Rubber Tree, Haikou 571101, Hainan, Peoples R China
3.Chinese Acad Trop Agr Sci, Rubber Res Inst, State Key Lab Breeding Base Cultivat & Physiol Tr, Haikou 571101, Hainan, Peoples R China
4.Yunnan Inst Trop Crops, Jinghong 666100, Peoples R China
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
页码：
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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