<i>Microdochium majus</i> Isolated from Grapevine Is a Mycoparasite of <i>Botrytis cinerea</i>
The best known <i>Microdochium</i> spp. are important pathogens of small-grain cereals and/or endophytes of diverse monocot hosts. This study is the first report of <i>M. majus</i> isolated from asymptomatic grapevine tissues. It was hypothesised that this <i>M. majus&l...
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| Main Authors: | , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-01-01
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| Series: | Journal of Fungi |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2309-608X/11/1/31 |
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| Summary: | The best known <i>Microdochium</i> spp. are important pathogens of small-grain cereals and/or endophytes of diverse monocot hosts. This study is the first report of <i>M. majus</i> isolated from asymptomatic grapevine tissues. It was hypothesised that this <i>M. majus</i> strain, CBS 152328, was an endophyte and an antagonist of some fungal pathogens of grapevine. Microscopic examinations revealed that this strain was a necrotrophic mycoparasite of <i>Botrytis cinerea</i>. This was demonstrated in the confrontation zones of dual cultures of <i>M. majus</i> and <i>B. cinerea</i>, and also on the surface of co-inoculated grape leaf discs and germinated wheat grains. Pathogenicity tests indicated that <i>M. majus</i> can colonise both grape leaf discs and germinated wheat, but it only damaged wheat. When co-inoculated with <i>B. cinerea</i> onto grape leaf discs, the <i>M. majus</i> strain CBS 152328 suppressed its mycohost on grape tissues and prevented leaf necrosis caused by <i>B. cinerea</i>. In addition to the parasitism, <i>M. majus</i> also showed mild antibiosis against <i>B. cinerea</i>, as well as a defence elicitor effect on grape leaf discs. This work is the first report of the mycoparasitic behaviour of <i>M. majus</i>, in addition to its first isolation from a dicot host. |
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| ISSN: | 2309-608X |