First Report of Root Rot Caused by Fusarium avenaceum and Fusarium flocciferum on Astragalus membranaceus var. mongholicus in China

IF 1.1 4区农林科学 Q3 PLANT SCIENCES Journal of Phytopathology Pub Date : 2024-09-22 DOI:10.1111/jph.13397

Hexing Qi, Xiangxing Qi, Wenhua Xu, Zhouluo An, Taiyan Fan

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Abstract

Astragalus membranaceus var. mongholicus (Mongolian milkvetch) is one of the most important traditional Chinese medicinal plants. In July 2021, root rot of A. membranaceus var. mongholicus was found in a field in Tongren City, Huangnan Tibetan Autonomous Prefecture, Qinghai Province, China. The aboveground part of the plants exhibited yellowing, wilting and defoliation in severe cases. Seven fungal isolates were obtained, and their pathogenicity, morphology and phylogeny were analysed. A pathogenicity test was performed using the scratch and root irrigation methods, and the results showed that all seven isolates caused root rot on inoculated plants. Based on morphological characteristics and phylogenetic analysis of multi-locus sequences (ITS, translation elongation factor [TEF-1α], and RNA polymerase II beta subunit [RPB2] genes), two isolates were identified as Fusarium avenaceum, and five isolates were identified as F. flocciferum. To the best of our knowledge, this is the first report of F. avenaceum and F. flocciferum causing root rot of A. membranaceus var. mongholicus in China.

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中国首次报告由 Fusarium avenaceum 和 Fusarium flocciferum 在黄芪变种上引起的根腐病

黄芪（Astragalus membranaceus var. mongholicus）是中国最重要的传统药用植物之一。2021 年 7 月，在中国青海省黄南藏族自治州铜仁市的一块田地里发现了蒙古黄芪根腐病。植株地上部分出现黄化、枯萎，严重时还会落叶。共获得 7 个真菌分离株，并对其致病性、形态和系统发育进行了分析。使用划痕法和灌根法进行了致病性试验，结果表明所有 7 个分离株都会导致接种植株根部腐烂。根据形态特征和多焦点序列（ITS、翻译延伸因子 [TEF-1α] 和 RNA 聚合酶 II beta 亚基 [RPB2]）的系统发育分析，两个分离株被鉴定为 Fusarium avenaceum，五个分离株被鉴定为 F. flocciferum。据我们所知，这是中国首次报道 F. avenaceum 和 F. flocciferum 引起膜衣壳菌根腐病。

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来源期刊

Journal of Phytopathology 生物-植物科学

CiteScore

2.90

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： Journal of Phytopathology publishes original and review articles on all scientific aspects of applied phytopathology in agricultural and horticultural crops. Preference is given to contributions improving our understanding of the biotic and abiotic determinants of plant diseases, including epidemics and damage potential, as a basis for innovative disease management, modelling and forecasting. This includes practical aspects and the development of methods for disease diagnosis as well as infection bioassays. Studies at the population, organism, physiological, biochemical and molecular genetic level are welcome. The journal scope comprises the pathology and epidemiology of plant diseases caused by microbial pathogens, viruses and nematodes. Accepted papers should advance our conceptual knowledge of plant diseases, rather than presenting descriptive or screening data unrelated to phytopathological mechanisms or functions. Results from unrepeated experimental conditions or data with no or inappropriate statistical processing will not be considered. Authors are encouraged to look at past issues to ensure adherence to the standards of the journal.