| Autor: |
Xie, Lihong, Yang, Qiuxiao, Wu, Yanfei, Xiao, Jianbo, Qu, Hongxia, Jiang, Yueming, Li, Taotao |
| Zdroj: |
Journal of Agricultural and Food Chemistry; April 2023, Vol. 71 Issue: 13 p5372-5381, 10p |
| Abstrakt: |
Fungal response to oxidative stress during infection on postharvest fruit is largely unknown. Here, we found that hydrogen peroxide (H2O2) treatment inhibited the growth of Fusarium proliferatumcausing crown rot of banana fruit, confirmed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) observation. H2O2exposure increased endogenous reactive oxygen species (ROS) and fumonisin B1 (FB1) production in F. proliferatum, possibly by modulating FUMor ROS-related gene expression. Importantly, H2O2treatment inhibited F. proliferatumgrowth in vivobut induced FB1 accumulation in banana peel. Finally, we constructed the FpFUM21 deletion mutant (ΔFpfum21) of F. proliferatumthat was attenuated in FB1 biosynthesis and less tolerant to oxidative stress. Moreover, the ΔFpfum21 strain was less virulent compared to the wild type (WT) due to the inability to induce FB1 production in the banana host. These results suggested that FB1 biosynthesis is associated with oxidative stress in F. proliferatumand contributes to fungal infection on banana fruit. |
| Databáze: |
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