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Article

Microdochium majus Isolated from Grapevine Is a Mycoparasite of Botrytis cinerea

by
Kálmán Zoltán Váczy
1,*,
Dóra Szabó
1,
Nikolett Molnár
1,
Tibor Kiss
1,
Levente Kiss
1,2,
Yu Pei Tan
2,
Ádám Novák
1,
Xénia Pálfi
1,
Adrienn Gomba-Tóth
1 and
Zoltán Karácsony
1
1
Food and Wine Research Institute, Eszterházy Károly Catholic University, Leányka utca 8/G, H-3300 Eger, Hungary
2
Centre for Crop Health, University of Southern Queensland, Toowoomba, QLD 4350, Australia
*
Author to whom correspondence should be addressed.
J. Fungi 2025, 11(1), 31; https://doi.org/10.3390/jof11010031
Submission received: 10 December 2024 / Revised: 25 December 2024 / Accepted: 28 December 2024 / Published: 4 January 2025
(This article belongs to the Section Environmental and Ecological Interactions of Fungi)
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Abstract

The best known Microdochium spp. are important pathogens of small-grain cereals and/or endophytes of diverse monocot hosts. This study is the first report of M. majus isolated from asymptomatic grapevine tissues. It was hypothesised that this M. majus 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 Botrytis cinerea. This was demonstrated in the confrontation zones of dual cultures of M. majus and B. cinerea, and also on the surface of co-inoculated grape leaf discs and germinated wheat grains. Pathogenicity tests indicated that M. majus can colonise both grape leaf discs and germinated wheat, but it only damaged wheat. When co-inoculated with B. cinerea onto grape leaf discs, the M. majus strain CBS 152328 suppressed its mycohost on grape tissues and prevented leaf necrosis caused by B. cinerea. In addition to the parasitism, M. majus also showed mild antibiosis against B. cinerea, as well as a defence elicitor effect on grape leaf discs. This work is the first report of the mycoparasitic behaviour of M. majus, in addition to its first isolation from a dicot host.
Keywords: biocontrol; endophyte; fungal parasite; host preference biocontrol; endophyte; fungal parasite; host preference
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MDPI and ACS Style

Váczy, K.Z.; Szabó, D.; Molnár, N.; Kiss, T.; Kiss, L.; Tan, Y.P.; Novák, Á.; Pálfi, X.; Gomba-Tóth, A.; Karácsony, Z. Microdochium majus Isolated from Grapevine Is a Mycoparasite of Botrytis cinerea. J. Fungi 2025, 11, 31. https://doi.org/10.3390/jof11010031

AMA Style

Váczy KZ, Szabó D, Molnár N, Kiss T, Kiss L, Tan YP, Novák Á, Pálfi X, Gomba-Tóth A, Karácsony Z. Microdochium majus Isolated from Grapevine Is a Mycoparasite of Botrytis cinerea. Journal of Fungi. 2025; 11(1):31. https://doi.org/10.3390/jof11010031

Chicago/Turabian Style

Váczy, Kálmán Zoltán, Dóra Szabó, Nikolett Molnár, Tibor Kiss, Levente Kiss, Yu Pei Tan, Ádám Novák, Xénia Pálfi, Adrienn Gomba-Tóth, and Zoltán Karácsony. 2025. "Microdochium majus Isolated from Grapevine Is a Mycoparasite of Botrytis cinerea" Journal of Fungi 11, no. 1: 31. https://doi.org/10.3390/jof11010031

APA Style

Váczy, K. Z., Szabó, D., Molnár, N., Kiss, T., Kiss, L., Tan, Y. P., Novák, Á., Pálfi, X., Gomba-Tóth, A., & Karácsony, Z. (2025). Microdochium majus Isolated from Grapevine Is a Mycoparasite of Botrytis cinerea. Journal of Fungi, 11(1), 31. https://doi.org/10.3390/jof11010031

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