数字农科院2.0

The quantity of OA and activity of cellulase and polygalacturonase are involved in variation of virulence in Sclerotium rolfsii

文献类型： 外文期刊

作者： Dongyang Yu;Wanduo Song;Qianqian Wang;Yanping Kang;Yong Lei;Zhihui Wang;Yuning Chen;Dongxin Huai;Wang Xin;Boshou Liao;Liying Yan

作者机构：

关键词： Cell wall degrading enzyme;Microscopic observation;Oxalic acid;Pathogenicity;Sclerotium rolfsii Sacc.;Virulence variation

期刊名称： Oil Crop Science

ISSN： 2096-2428

年卷期： 2023 年 8 卷 2 期

页码：

收录情况： CSCD（2023-2024年度） ; ; 农林核心（2020版）

摘要： In order to understand the pathogenic mechanisms of Sclerotium rolfsii on peanut and to analyze the variation of virulence in S. rolfsii strains, the highly virulent strain (ZY2) and weakly virulent strain (GP3-1) were investigated under both in vivo and in vitro conditions. The results indicated that S. rolfsii directly infected peanut by producing infection cushions. ZY2 formed infection cushions earlier than GP3-1, and ZY2 produced a greater number of infection cushions compare to GP3-1. Both strains could utilize cellulose, xylose, or polygalacturonic acid in the Czapek medium. The activities of cellulase (CL) and polygalacturonase (PG) in the inoculated peanut stems increased significantly at 9 ​h after inoculation. The activities of CL and PG produced by ZY2 in the inoculated stems were significantly higher than that produced by GP3-1. Both strains could produce oxalic acid (OA), and the content of OA produced by ZY2 in the inoculated stems was higher than that produced by GP3-1. In summary, it suggested that S. rolfsii destroyed peanut cells through physical and biochemical factors by secreting a large amount of OA, CL and PG during the formation of infection cushions. The difference in OA content, activity of CL and PG produced by highly and weakly virulent strains played important roles in variation of virulence.

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