数字农科院2.0

First Report Of Southern Blight Of Mung Bean Caused By Sclerotium Rolfsii In China

文献类型： 外文期刊

作者： Sun, SL; Sun, FF; Deng, D; Duan, CX; Zhu, ZD

作者机构：

关键词： Vigna Radiata; Southern Blight; Sclerotium Rolfsii; Heterogeneity

期刊名称： CROP PROTECTION

ISSN： 0261-2194

年卷期： 2020 年 130 卷

页码：

收录情况： JCR（2021版）

摘要： Mung bean (Vigna radiate) is an important legume crop in China. An emerging mung bean disease with symptoms resembling southern blight was detected in China. This study was conducted to confirm and characterize the responsible pathogen through cultural and morphological characterization, and molecular detection using multiple specific primers and multiple-clone sequence analysis of the rDNA internal transcribed spacer (ITS) region and the translation elongation factor 1 alpha (EF1 alpha) and RNA polymerase II subunit 2 (RPB2) genes. All isolates obtained from mung bean were identified as Sclerotium rolfsii. Interestingly, we found that rDNA ITS, EF1 alpha, and RPB2 sequences of all isolates consisted of two distinct types, which likely originated from different nuclei. Our findings indicated that S. rolfsii isolates were heterokaryotic and contain a heterozygous genome. Two trials of pathogenicity and host range revealed that all S. rolfsii isolates were not only strongly virulent to mung bean but also to several other important crops, indicating their potential threat to future agricultural production. To our knowledge, this is the first report of S. rolfsii causing southern blight on mung bean in China.

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