Identification of wheat blue dwarf phytoplasma effectors targeting plant proliferation and defence responses

文献类型： 外文期刊

第一作者： Wang, N.

作者： Wang, N.;Yang, H. Z.;Zhang, P. H.;Wu, Y. F.;Li, Y.;Chen, W.

作者机构：

关键词： SAP11-like; TENGU-like; wheat blue dwarf phytoplasma; witches' broom

期刊名称：PLANT PATHOLOGY （ 影响因子：2.59； 五年影响因子：2.924 ）

ISSN： 0032-0862

年卷期： 2018 年 67 卷 3 期

页码：

收录情况： SCI

摘要： The identification of effectors from pathogenic microbes is one of the most important subjects for elucidating infection mechanisms. Wheat blue dwarf (WBD) phytoplasma causes dwarfism, witches' broom, and yellow leaf tips in wheat plants, resulting in severe yield loss in northwestern China. In this study, 37 candidate effector proteins were transiently expressed in Nicotiana benthamiana. Plants expressing the SAP11-like protein SWP1 exhibited typical witches' broom. Interestingly, another protein, SWP11, induced both cell death and defence responses, including H2O2 accumulation and callose deposition. Analysis by qRT-PCR was used to show that a marker gene of the hypersensitive response, HIN1, and three pathogenesis-related genes, PR1, PR2 and PR3, were significantly up-regulated in leaves of N.benthamiana expressing SWP11. In addition, SWP12 and SWP21 (TENGU-like) were shown to suppress SWP11-, BAX-, and/or INF1-induced cell death. These results indicated that SWP21 has a distinct role in virulence compared with TENGU and that WBD phytoplasma possesses effectors that target plant proliferation and defence responses. The ability of these effectors to trigger or suppress plant immunity provides new insights into the phytoplasma-plant interaction.

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