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Characterization of HbEREBP1, a wound-responsive transcription factor gene in laticifers of Hevea brasiliensis Muell. Arg.

文献类型： 外文期刊

作者： Chen, Yue-Yi 1 ; Wang, Li-Feng 1 ; Dai, Long-Jun 1 ; Yang, Shu-Guang 1 ; Tian, Wei-Min 1 ;

作者机构： 1.Chinese Acad Trop Agr Sci, Rubber Res Inst, Minist Agr, Key Lab Rubber Biol, Danzhou 571737, Hainan, Peoples R China

2.Hainan Univ, Coll Hort & Landscape Architecture, Danzhou 571737, Hainan, Peoples R China

关键词： Rubber tree;Laticifer;AP2/ERF transcription factor;Wound signal;Defense

期刊名称：MOLECULAR BIOLOGY REPORTS （ 影响因子：2.316； 五年影响因子：2.357 ）

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收录情况： SCI

摘要： AP2/ERF transcription factors play an important role in regulation of the cross-talk between ethylene and jasmonate signaling pathways mediating defense responses of plants to biotic and abiotic stresses. In this study, an AP2/ERF transcription factor gene was isolated and characterized from laticifers of rubber tree by using RACE and real time PCR. The full length cDNA, referred to as HbEREBP1, was 1,095 bp in length and contained a 732 bp open reading frame encoding a putative protein of 243 amino acid residues. The molecular mass of the putative protein is 26.4 kDa with a pI of 9.46. The deduced amino acid sequence had a specific domain of AP2 superfamily and an ethylene-responsive element binding factor-associated amphiphilic repression motif, sharing 42.4, 39.1, and 38.0% identity with that of AtERF11, AtERF4, and AtERF8 in Arabidopsis, respectively. HbEREBP1 expression was down-regulated by tapping and mechanical wounding in the laticifers of adult trees. It was also down-regulated at early stage while up-regulated at late stage upon treatment with exogenous ethephon or methyl jasmonate, which was reverse to the case of defense genes in laticifers of epicormic shoots of rubber tree. Our results suggest that HbEREBP1 may be a negative regulator of defense genes in laticifers.

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