遗传 ›› 2010, Vol. 32 ›› Issue (6): 561-570.doi: 10.3724/SP.J.1005.2010.00561

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RNA沉默在植物生物逆境反应中的作用

谢兆辉   

  1. 德州学院生物系, 德州 253023
  • 收稿日期:2009-09-25 修回日期:2009-12-08 出版日期:2010-06-20 发布日期:2010-05-24
  • 通讯作者: 谢兆辉 E-mail:xiezhh6823@163.com
  • 基金资助:

    山东省自然科学基金(编号:Y2008D3)

The roles of RNA silencing in plant biotic stress

xie zhaohui   

  1. Department of Biology, Dezhou University, Dezhou 253023, China
  • Received:2009-09-25 Revised:2009-12-08 Online:2010-06-20 Published:2010-05-24
  • Contact: xie zhaohui E-mail:xiezhh6823@163.com

摘要:

RNA沉默是真核生物共有的基因表达调节机制和防御机制。在植物RNA沉默中, 一些小RNAs, 如微小 RNAs和小干扰RNAs, 在植物防御病毒、细菌或食草动物的反应中具有重要作用。为了抑制宿主的RNA沉默系统, 植物病毒或细菌进化出了在RNA沉默不同阶段起作用的病毒沉默抑制子或细菌沉默抑制子, 来克服寄主的RNA沉默反应。文章就植物RNA沉默、病毒沉默抑制子、细菌沉默抑制子及其相关防御反应的一些新进展做一概述。

关键词: RNA沉默, 微小RNA, 小干扰RNA, 病毒沉默抑制子, 细菌沉默抑制子

Abstract:

RNA silencing is a common strategy shared by eukaryotic organisms to regulate gene expression, and also can operate as a defense mechanism against biotic stress. In plants, small RNAs play an important role in defensing against viruses, bacteria or herbivore attack, such as miRNAs and siRNAs. As a response to this defense system, both viruses and bacteria have evolved viral suppressors of RNA silencing (VSRs) or bacterial suppressors of RNA silencing (BSRs) to overcome the host silencing response, which can act at various steps of the different silencing pathways. This review highlights the current understanding and the new insights concerning of the roles of small RNAs in defensing against biotic stress and the mechanism of VSRs and BSRs in suppressing host RNA silencing in plants.

Key words: RNA silencing, miRNAs, siRNAs, viral suppressors of RNA silencing (VSRs), bacterial suppressors of RNA silencing (BSRs)