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Specific adaptation of Ustilaginoidea virens in occupying host florets revealed by comparative and functional genomics

Author

Listed:
  • Yong Zhang

    (China Agricultural University)

  • Kang Zhang

    (China Agricultural University)

  • Anfei Fang

    (China Agricultural University)

  • Yanqing Han

    (China Agricultural University)

  • Jun Yang

    (China Agricultural University
    State Key Laboratory of Agrobiotechnology, China Agricultural University)

  • Minfeng Xue

    (China Agricultural University
    State Key Laboratory of Agrobiotechnology, China Agricultural University)

  • Jiandong Bao

    (State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences)

  • Dongwei Hu

    (Institute of Biotechnology, Zhejiang University)

  • Bo Zhou

    (State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences
    International Rice Research Institute)

  • Xianyun Sun

    (Institute of Microbiology, Chinese Academy of Sciences)

  • Shaojie Li

    (Institute of Microbiology, Chinese Academy of Sciences)

  • Ming Wen

    (Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University)

  • Nan Yao

    (Guangdong Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University)

  • Li-Jun Ma

    (University of Massachusetts)

  • Yongfeng Liu

    (Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences)

  • Min Zhang

    (College of Bioscience and Biotechnology, Hunan Agricultural Unversity)

  • Fu Huang

    (College of Agronomy, Sichuan Agricultural University)

  • Chaoxi Luo

    (College of Plant Sciences and Technology, Huazhong Agricultural University)

  • Ligang Zhou

    (China Agricultural University)

  • Jianqiang Li

    (China Agricultural University)

  • Zhiyi Chen

    (Institute of Plant Protection, Jiangsu Academy of Agricultural Sciences)

  • Jiankun Miao

    (Institute of Plant Protection, Liaoning Academy of Agricultural Sciences)

  • Shu Wang

    (Institute of Plant Protection, Liaoning Academy of Agricultural Sciences)

  • Jinsheng Lai

    (China Agricultural University)

  • Jin-Rong Xu

    (Purdue University)

  • Tom Hsiang

    (School of Environmental Sciences, University of Guelph)

  • You-Liang Peng

    (China Agricultural University
    State Key Laboratory of Agrobiotechnology, China Agricultural University)

  • Wenxian Sun

    (China Agricultural University)

Abstract

Ustilaginoidea virens (Cooke) Takah is an ascomycetous fungus that causes rice false smut, a devastating emerging disease worldwide. Here we report a 39.4 Mb draft genome sequence of U. virens that encodes 8,426 predicted genes. The genome has ~25% repetitive sequences that have been affected by repeat-induced point mutations. Evolutionarily, U. virens is close to the entomopathogenic Metarhizium spp., suggesting potential host jumping across kingdoms. U. virens possesses reduced gene inventories for polysaccharide degradation, nutrient uptake and secondary metabolism, which may result from adaptations to the specific floret infection and biotrophic lifestyles. Consistent with their potential roles in pathogenicity, genes for secreted proteins and secondary metabolism and the pathogen–host interaction database genes are highly enriched in the transcriptome during early infection. We further show that 18 candidate effectors can suppress plant hypersensitive responses. Together, our analyses offer new insights into molecular mechanisms of evolution, biotrophy and pathogenesis of U. virens.

Suggested Citation

  • Yong Zhang & Kang Zhang & Anfei Fang & Yanqing Han & Jun Yang & Minfeng Xue & Jiandong Bao & Dongwei Hu & Bo Zhou & Xianyun Sun & Shaojie Li & Ming Wen & Nan Yao & Li-Jun Ma & Yongfeng Liu & Min Zhang, 2014. "Specific adaptation of Ustilaginoidea virens in occupying host florets revealed by comparative and functional genomics," Nature Communications, Nature, vol. 5(1), pages 1-12, September.
    • Handle: RePEc:nat:natcom:v:5:y:2014:i:1:d:10.1038_ncomms4849
    DOI: 10.1038/ncomms4849
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