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Transient silencing of VvCSN5 enhances powdery mildew resistance in grapevine (Vitis vinifera)

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Abstract

As one of the most economically important fruit crops in the world, the grapevine (Vitis vinifera) suffers significant yield losses from various pathogens including powdery mildew caused by Erysiphe necator. In contrast, several wild Chinese grapevines, including Vitis pseudoreticulata accession Baihe-35-1, are highly resistant to powdery mildew pathogens. Here, we identified a grapevine gene CSN5 (COP9 signalosome complex subunit 5), designated VvCSN5, that was differentially expressed between the resistant ‘Baihe-35-1’ and susceptible ‘Thompson Seedless’ during powdery mildew isolate Erysiphe necator NAFU1 infection. Moreover, transient silencing of VvCSN5 in ‘Thompson Seedless’ leaves enhanced resistance to En NAFU1. This resistance manifested in cell wall callose deposition at attempted infection sites and hypersensitive response-like cell death of penetrated epidermal cells. Several defense-related marker genes (VvPR1, VvPR3, VvPAD4, and VvRBOHD) had higher basal expression levels in VvCSN5-silenced leaves. In addition, we found the structure and activity of CSN5 promoters in ‘Thompson Seedless’ and ‘Baihe-35-1’ were different, which may have been behind their different resistances to powdery mildew infection. Taken together, these results implied that grapevine CSN5 plays an important role in the response to powdery mildew infection.

Key message

Transient silencing of VvCSN5 in Vitis vinifera leaves enhances powdery mildew resistance. In addition, the CSN5 promoters in susceptible and resistant grapevines are different.

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Acknowledgements

This study was funded by the National Natural Science Foundation of China (Grant No. 31972986, 31772264 to YQW).

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KCC and YQW conceived and designed the research. KCC and ML conducted most of the experiments. GHK, XYZ, BM, MZ and YH participated in the experiments. KCC wrote the manuscript. All authors read and approved the manuscript.

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Correspondence to Ying-Qiang Wen.

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The authors declare that they have no conflict of interest.

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Communicated by Wenwu Guo.

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Cui, KC., Liu, M., Ke, GH. et al. Transient silencing of VvCSN5 enhances powdery mildew resistance in grapevine (Vitis vinifera). Plant Cell Tiss Organ Cult 146, 621–633 (2021). https://doi.org/10.1007/s11240-021-02098-z

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  • DOI: https://doi.org/10.1007/s11240-021-02098-z

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