beta C1, the pathogenicity factor of TYLCCNV, interacts with AS1 to alter leaf development and suppress selective jasmonic acid responses

文献类型： 外文期刊

第一作者： Yang, Jun-Yi

作者： Yang, Jun-Yi;Chua, Nam-Hai;Iwasaki, Mayumi;Machida, Chiyoko;Machida, Chiyoko;Zhou, Xueping

作者机构：

关键词： geminivirus;asymmetric leaves 1;asymmetric leaves 2;jasmonic acid;silencing suppressor;whitefly

期刊名称：GENES & DEVELOPMENT （ 影响因子：11.361； 五年影响因子：12.029 ）

ISSN： 0890-9369

年卷期： 2008 年 22 卷 18 期

页码：

收录情况： SCI

摘要： Viruses induce pathogenic symptoms on plants but the molecular basis is poorly understood. Here, we show that transgenic Arabidopsis expressing the pathogenesis protein beta C1 of Tomato yellow leaf curl China virus (TYLCCNV), a geminivirus, can phenocopy to a large extent disease symptoms of virus-infected tobacco plants in having upward curled leaves, radialized leaves with outgrowth tissues from abaxial surfaces, and sterile flowers. These morphological changes are paralleled by a reduction in miR165/166 levels and an increase in PHB and PHV transcript levels. Two factors, ASYMMETRIC LEAVES 1 (AS1) and ASYMMETRIC LEAVES 2 (AS2), are known to regulate leaf development as AS1/AS2 complex. Strikingly, beta C1 plants phenocopy plants overexpressing AS2 at the morphological and molecular level and beta C1 is able to partially complement as2 mutation. beta C1 binds directly to AS1, elicits morphological and gene expression changes dependent on AS1 but not AS2, and attenuates expression of selective jasmonic acid (JA)-responsive gene. Our results show that beta C1 forms a complex with AS1 to execute its pathogenic functions and to suppress a subset of JA responses.

分类号： Cell Biology; Developmental Biology; Genetics & Heredity

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