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Inactivation Effects Of Plasma-activated Water On Fusarium Graminearum

Jian Guo, Jiaoyu Wang, Hui Xie, Junlong Jiang, Chunyuan Li, Wanting Li, Ling Li, Xingquan Liu, Fucheng Lin

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AbstractThe continuous usage of fungicides poses a potential threat to the environment, ranging from mere irritation to being very toxic to human beings and organisms. Plasma-activated water (PAW) has recently gained much interest as a promising candidate to inactivate fungi. However, the inactivation mechanisms of PAW are still not well understood. In this study, the effect of PAW on the viability and the cellular responses of Fusarium graminearum in PAW inactivation were investigated. The results showed that microbial activity of spores was significantly inhibited by PAW treatment (P < 0.05). The symptoms caused by F. graminearum were significantly reduced on the spikelets. Our data indicated that PAW could induce cell wall sculpturing, membrane permeability changes, and mitochondrial dysfunction. Differential gene expression analysis also confirmed that the cell membrane, the cell wall and the mitochondria were the organelles most affected by PAW. The results from this study facilitate the understanding of the mechanisms underlying the responses of F. graminearum to PAW and the development of PAW as a potential fungicidal agent or an effective supplement to fungicides.HighlightsThe viability of F. graminearum is notably inhibited by PAWThe symptoms caused by F. graminearum were significantly reduced on the spikeletsOxidative stress induce cell wall sculpturing, membrane permeability changePAW can cause the mitochondrial dysfunctionCell wall, membrane and mitochondria are the most affected organelles by PAW