Biological Control of Pear Valsa Canker Caused by Valsa pyri Using Penicillium citrinum

文献类型： 外文期刊

第一作者： Yuan, Hongbo

作者： Yuan, Hongbo;Shi, Bingke;Huang, Tianxiang;Zhou, Zengqiang;Wang, Li;Hou, Hui;Tu, Hongtao

作者机构：

关键词： Valsa canker; Valsa pyri; biological control; antifungal activity; Penicillium citrinum

期刊名称：HORTICULTURAE （ 影响因子：2.331； 五年影响因子：2.951 ）

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年卷期： 2021 年 7 卷 7 期

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收录情况： SCI

摘要： Valsa canker caused by Valsa pyri is one of the most destructive diseases of commercial pear. For the present analysis, 29 different endophytic fungal strains were isolated from the branches of a healthy pear tree. In dual culture assays, strain ZZ1 exhibited robust antifungal activity against all tested pathogens including Valsa pyri. Microscopic analyses suggested that following co-culture with ZZ1, the hyphae of V. pyri were ragged, thin, and ruptured. ZZ1 also induced significant decreases in lesion length and disease incidence on detached pear branches inoculated with V. pyri. ZZ1 isolate-derived culture filtrates also exhibited antifungal activity against V. pyri, decreasing mycelial growth and conidium germination and inhibiting V. pyri-associated lesion development on pear branches. These results suggest that the ZZ1 isolate has the potential for use as a biological control agent against V. pyri. The strain was further identified as Penicillium citrinum based on its morphological characteristics and molecular analyses. Overall, these data highlight a potentially valuable new biocontrol resource for combating pear Valsa canker.

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