Differential Characteristics of Viral siRNAs between Leaves and Roots of Wheat Plants Naturally Infected with Wheat Yellow Mosaic Virus, a Soil-Borne Virus

文献类型: 外文期刊

第一作者: Li, Linying

作者: Li, Linying;Li, Linying;Xu, Yu;Zhang, Yan;Hu, Lifeng;Sun, Zongtao;Hong, Gaojie;Chen, Yang;Yan, Fei;Yang, Jian;Li, Junmin;Chen, Jianping;Li, Linying;Xu, Yu;Sun, Zongtao;Hong, Gaojie;Chen, Yang;Yan, Fei;Yang, Jian;Li, Junmin;Chen, Jianping;Andika, Ida Bagus;Xin, Xiangqi

作者机构:

关键词: soil-borne plant viruses;wheat yellow mosaic virus;viral small interfering RNA;antiviral RNA silencing;deep sequencing

期刊名称:FRONTIERS IN MICROBIOLOGY ( 影响因子:5.64; 五年影响因子:6.32 )

ISSN: 1664-302X

年卷期: 2017 年 8 卷

页码:

收录情况: SCI

摘要: RNA silencing is an important innate antiviral defense in plants. Soil-borne plant viruses naturally infect roots via soil-inhabiting vectors, but it is unclear how antiviral RNA silencing responds to virus infection in this particular tissue. In this study, viral small interfering RNA (siRNA) profiles from leaves and roots of wheat plants naturally infected with a soil-borne virus, wheat yellow mosaic virus (WYMV, genus Bymovirus), were analyzed by deep sequencing. WYMV siRNAs were much more abundant in roots than leaves, which was positively correlated with the accumulation of viral RNA. WYMV siRNAs in leaves and roots were predominantly 21- and 22-nt long and equally derived from the positive-and negative-strands of the viral genome. WYMV siRNAs from leaves and roots differed in distribution pattern along the viral genome. Interestingly, compared to siRNAs from leaves (and most other reports), those from roots obviously had a lower A/U bias at the 5'-terminal nucleotide. Moreover, the expression of Dicer-like genes upon WYMV infection were differently regulated between leaves and roots. Our data suggest that RNA silencing in roots may operate differently than in leaves against soil-borne virus invasion.

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