A Glycosyl Hydrolase 5 Family Protein Is Essential for Virulence of Necrotrophic Fungi and Can Suppress Plant Immunity
Phytopathogenic fungi normally secrete large amounts of CWDEs to enhance infection of plants. In this study, we identified and characterized a secreted glycosyl hydrolase 5 family member in <i>Sclerotinia sclerotiorum</i> (SsGH5, <i>Sclerotinia sclerotiorum</i> Glycosyl Hydro...
| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2024-02-01
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| Series: | International Journal of Molecular Sciences |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1422-0067/25/5/2693 |
| Summary: | Phytopathogenic fungi normally secrete large amounts of CWDEs to enhance infection of plants. In this study, we identified and characterized a secreted glycosyl hydrolase 5 family member in <i>Sclerotinia sclerotiorum</i> (SsGH5, <i>Sclerotinia sclerotiorum</i> Glycosyl Hydrolase 5). <i>SsGH5</i> was significantly upregulated during the early stages of infection. Knocking out <i>SsGH5</i> did not affect the growth and acid production of <i>S. sclerotiorum</i> but resulted in decreased glucan utilization and significantly reduced virulence. In addition, <i>Arabidopsis thaliana</i> expressing SsGH5 became more susceptible to necrotrophic pathogens and basal immune responses were inhibited in these plants. Remarkably, the lost virulence of the <i>ΔSsGH5</i> mutants was restored after inoculating onto <i>SsGH5</i> transgenic <i>Arabidopsis</i>. In summary, these results highlight that <i>S. sclerotiorum</i> suppresses the immune responses of <i>Arabidopsis</i> through secreting SsGH5, and thus exerts full virulence for successful infection. |
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| ISSN: | 1661-6596 1422-0067 |