Czech Mycology 74(2): 141–152             Article published online: 14th November, 2022 doi: 10.33585/cmy.74203

AL-TOUBI A. S. S., AL-SADI A. M., AL-MAHMOOLI I. H., AL-HARRASI M. M. A., AL-SABAHI J. N., VELAZHAHAN R.

Volatile organic compounds emitted by mycoparasitic fungi Hypomyces perniciosus and Cladobotryum mycophilum suppress the growth of Agaricus bisporus.

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Abstract

Hypomyces perniciosus and Cladobotryum mycophilum are mycoparasitic fungi infecting Agaricus bisporus and causing wet bubble and cobweb diseases, respectively. In this work, the role of volatile organic compounds (VOCs) emitted by these fungal mycoparasites in the suppression of A. bisporus was investigated. The VOCs of H. perniciosus and C. mycophilum effectively reduced the mycelial growth of A. bisporus by 60% and 73% after 5 days of incubation, respectively, compared to that of the control as assessed by the two-sealed-base-plates assay. Further, the VOCs of H. perniciosus and C. mycophilum were collected in a headspace solid-phase microextraction procedure, and their components analysed by means of gas chromatography-mass spectrometry. Ethanol was identified as the major volatile component in H. perniciosus and C. mycophilum. Ethanol vapour significantly retarded the growth of A. bisporus in an in vitro assay. The results of this study suggest that ethanol produced by H. perniciosus and C. mycophilum could be involved in the suppression of A. bisporus.


Keywords:     antifungal, cobweb, ethanol, wet bubble, white button mushroom.

Article history: received 2 August 2022, revised 8 October 2022, accepted 11 October 2022, published online 14 November 2022

Full citation:

Al-Toubi A. S. S., Al-Sadi A. M., Al-Mahmooli I. H., Al-Harrasi M. M. A., Al-Sabahi J. N., Velazhahan R. (2022): Volatile organic compounds emitted by mycoparasitic fungi Hypomyces perniciosus and Cladobotryum mycophilum suppress the growth of Agaricus bisporus. – Czech Mycology 74(2): 141–152. copy to clipboard


doi: 10.33585/cmy.74203

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