Functional characterization of powdery mildew resistance-related genes HbSGT1a and HbSGT1b in Hevea brasiliensis Muell. Arg.
文献类型： 外文期刊
作者： Wang, Meng 1 ; Xiao, Huaxing 1 ; Li, Xiaona 2 ; Wan, Sanlian 3 ; Yang, Ye 1 ; Yu, Haiyang 1 ; Zhang, Yu 1 ; Qin, Bi 4 ;
作者机构： 1.Hainan Univ, Sch Plant Protect, Key Lab Green Prevent & Control Trop Plant Dis &, Haikou 570228, Hainan, Peoples R China
2.Chinese Acad Trop Agr Sci, Inst Sci & Tech Informat, Haikou 571101, Hainan, Peoples R China
3.Sanya Sci & Technol Acad Crop Winter Multiplicat, Sanya 572000, Hainan, Peoples R China
4.Minist Agr & Rural Affairs, Key Lab Biol & Genet Resources Rubber Tree, Beijing, Peoples R China
5.Chinese Acad Trop Agr Sci, Rubber Res Inst, Haikou 571101, Hainan, Peoples R China
关键词： Rubber tree; HbSGT1; Powdery mildew; Abiotic stress; Hormone signalling
期刊名称：EUROPEAN JOURNAL OF PLANT PATHOLOGY （ 影响因子：2.224； 五年影响因子：2.262 ）
ISSN： 0929-1873
年卷期： 2023 年 165 卷 1 期
页码：
收录情况： SCI
摘要： SGT1 is an essential factor required for R proteins to trigger disease resistance and defense responses in plants. Although its vital role have been thoroughly studied in model plant species, so far no SGT1 gene in rubber tree has been identified. In this study, HbSGT1a and HbSGT1b from rubber trees were cloned. The amino acid sequences identities between HbSGT1a and HbSGT1b is 64.82%, and both of them have conserved TPR, CS and SGS domains, which are the characteristic domains of SGT1 proteins. Expression analysis showed that the transcripts of HbSGT1b were more abundant than HbSGT1a in all tissues. Moreover, transcripts of both HbSGT1a and HbSGT1b were triggered by powdery mildew attack in rubber trees. Additionally, transcripts of HbSGT1a and HbSGT1b were significantly induced by exogenous phytohormones and abiotic stress conditions. Yeast two-hybrid assays demonstrated that both HbSGT1a and HbSGT1b interacted with a heat shock protein 90 (HbHSP90.1). Interestingly, HbSGT1a and HbSGT1b showed a strong interaction. Taken together, these results suggested that HbSGT1 and HbHSP90.1 form a functional complex and carry out essential roles in powdery mildew and stress resistance, as well as hormone signaling in rubber tree.
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