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. 2022 Jun 9;13:910712. doi: 10.3389/fmicb.2022.910712

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Copyright © 2022 Li, Cao, Ji, Zhang, Meng, Dai, Hu, Wang, Cao and Wang.

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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The virulence levels of A. alternata virus-infected strain QY21 and the isogenic virus-cured strains QY21-C1 and QY21-C2. (A) Disease spot diameter and representative images showing the lesions on Malus begonia leaf induced by A. alternata strains. (B) Disease spot diameter and representative images showing the lesions on apple fruits induced by A. alternata strains. The lesions were photographed at 5 days post-inoculation. (C) The yield of the mycotoxin alternariol (AOH) of different A. alternata strains. (D) Lesion lengths on the Begonia leaf induced by the mycotoxin AOH extracted from A. alternata strains. Different letters indicate a significant difference at p < 0.05 according to the post hoc t-tests.