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Taxonomy of fungal complex causing red-skin root of Panax ginseng in China

文献类型： 外文期刊

作者： Lu, Xiao H. 1 ; Zhang, Xi M. 1 ; Jiao, Xiao L. 1 ; Hao, Jianjun J. 3 ; Zhang, Xue S. 1 ; Luo, Yi 1 ; Gao, Wei W. 1 ;

作者机构： 1.Chinese Acad Med Sci & Peking Union Med Coll, Biotechnol Res Ctr, Inst Med Plant Dev, Beijing 100193, Peoples R China

2.Chinese Acad Agr Sci, Inst Plant Protect, Dept Biol Control, Beijing, Peoples R China

3.Univ Maine, Sch Food & Agr, Dept Plant Sci, Orono, ME 04469 USA

关键词： Cylindrocarpon; Fusarium; Ilyonectria; Panax ginseng; Root disease

期刊名称：JOURNAL OF GINSENG RESEARCH （ 影响因子：6.06； 五年影响因子：5.711 ）

ISSN： 1226-8453

年卷期： 2020 年 44 卷 3 期

页码：

收录情况： SCI

摘要： Background: Red-skin root of Asian ginseng (Panax ginseng) significantly reduces the quality and limits the production of ginseng in China. The disease has long been thought to be a noninfectious physiological disease, except one report that proved it was an infectious disease. However, the causal agents have not been successfully determined. In the present study, we were to reveal the pathogens that cause red-skin disease. Methods: Ginseng roots with red-skin root symptoms were collected from commercial fields in Northeast China. Fungi were isolated from the lesion and identified based on morphological characters along with multilocus sequence analyses on internal transcription spacer, beta-tubulin (tub2), histone H3 (his3), and translation elongation factor 1 alpha (tef-1 alpha). Pathogens were confirmed by inoculating the isolates in ginseng roots. Results: A total of 230 isolates were obtained from 209 disease samples. These isolates were classified into 12 species, including Dactylonectria sp., D. hordeicola, Fusarium acuminatum, F. avenaceum, F. solani, F. torulosum, Ilyonectria morn-panacis, I. robusta, Rhexocercosporidium panacis, and three novel species I. changbaiensis, I. communis, and I. qitaiheensis. Among them, I. communis, I. robusta, and F. solani had the highest isolation frequencies, being 36.1%, 20.9%, and 23.9%, respectively. All these species isolated were pathogenic to ginseng roots and caused red-skin root disease under appropriate condition. Conclusion: Fungal complex is the causal agent of red-skin root in P. ginseng. (C) 2019 The Korean Society of Ginseng. Publishing services by Elsevier B.V.

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