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

Journal of Ginseng Research 2020년 44권 3호 p.506 ~ 518
Lu Xiao H., Zhang Xi M., Jiao Xiao L., Hao Jianjun J., Zhang Xue S., Luo Yi, Gao Wei W.,
소속 상세정보
 ( Lu Xiao H. ) - Chinese Academy of Medical Sciences and Peking Union Medical College Institute of Medicinal Plant Development
 ( Zhang Xi M. ) - Chinese Academy of Medical Sciences and Peking Union Medical College Institute of Medicinal Plant Development
 ( Jiao Xiao L. ) - Chinese Academy of Medical Sciences and Peking Union Medical College Institute of Medicinal Plant Development
 ( Hao Jianjun J. ) - University of Maine School of Food and Agriculture Department of Plant Science
 ( Zhang Xue S. ) - Chinese Academy of Medical Sciences and Peking Union Medical College Institute of Medicinal Plant Development
 ( Luo Yi ) - Chinese Academy of Medical Sciences and Peking Union Medical College Institute of Medicinal Plant Development
 ( Gao Wei W. ) - Chinese Academy of Medical Sciences and Peking Union Medical College Institute of Medicinal Plant Development

Abstract


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, β-tubulin (tub2), histone H3 (his3), and translation elongation factor 1α (tef-1α). 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 mors-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.

키워드

Cylindrocarpon; Fusarium; Ilyonectria; Panax ginseng; Root disease

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