Molecular cloning, expression profiles and characterization of a glutathione reductase in Hevea brasiliensis

文献类型： 外文期刊

第一作者： Deng, Zhi

作者： Deng, Zhi;Zhao, Manman;Liu, Hui;Wang, Yuekun;Li, Dejun;Zhao, Manman

作者机构：

关键词： Glutathione reductase;Hevea brasiliensis;Expression profiles;Subcellular localization;Oxidative stress;H2O2 tolerance

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）

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收录情况： SCI

摘要： Glutathione reductase (GR; EC 1.8.1.7) is an important oxidoreductase that can protect organisms against various oxidative stresses. In this study, a new GR gene, named as HbGR2, was isolated from Hevea brasiliensis. The HbGR2 cDNA contained a 1674-bp open reading frame encoding 557 amino acids and the deduced HbGR2 protein showed high identities to the chloroplastic GRs from other plant species. HbGR2 was localized in the chloroplasts of tobacco mesophyll protoplasts. The cis-acting regulatory elements related to stress or hormone responses were predicted in the promoter region of HbGR2. The results from real-time RT-PCR analyses showed that HbGR2 was expressed throughout different tissues and developmental stages of leaves. Besides being related to tapping panel dryness (TPD), HbGR2 was regulated by several treatments including ethephon (ET), methyl jasmonate (MeJA), drought, low temperature, high salt, wounding and hydrogen peroxide (H2O2). The Escherichia coli (E. coli) cells overexpressing HbGR2 markedly increased their tolerance and survival at high concentrations of H2O2, suggesting that HbGR2 might play an important role in oxidative stress response in Hevea brasiliensis. (C) 2015 Elsevier Masson SAS. All rights reserved.

分类号： Q945`Q946

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