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. 2021 Jul 6;2:671796. doi: 10.3389/ffunb.2021.671796

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Copyright © 2021 Atanasoff-Kardjalieff, Lünne, Kalinina, Strauss, Humpf and Studt.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Fusapyrone (FPY) and deoxyfusapyrone (dFPY) chemical profiles in F. mangiferae. (A) HPLC-HRMS chromatograms of FPY (1) and dFPY (2) production in the FmKMT1 deletion strain (Δfmkmt1) compared to the wild-type strain (FmWT). For this, FmWT and three independent Δfmkmt1 strains were cultivated in FPY-inducing media for 7 days at 30°C. Experiments were performed in triplicates. The measurement of fungal supernatants show that only traces of FPY and dFPY are produced by Δfmkmt1 compared to FmWT. (B) HPLC-HRMS chromatogram of FPY and dFPY standards (applied in a concentration of 2 μg/mL). Structures of the γ-pyrones FPY and dFPY are shown below. TIC chromatograms (positive ESI-mode) range from m/z 100 to 1,000.