Fusarium spp. Associated with Dendrobium officinale Dieback Disease in China

A rare plant species of the Orchidaceae family, Dendrobium officinale is considered among the top ten Chinese medicinal herbs for its polysaccharide. Since 2021, when the dieback disease of D. officinale was first reported in Yueqing City, Zhejiang Province, China, Fusarium isolates (number = 152) w...

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Bibliographic Details
Published in:Journal of fungi (Basel) 2022-08, Vol.8 (9), p.919
Main Authors: Mirghasempour, Seyed Ali, Michailides, Themis, Chen, Weiliang, Mao, Bizeng
Format: Article
Language:English
Subjects:
Dendrobium officinale
Dieback
Ethanol
Flabellum curvatum
Flowers & plants
Fruits
Fusarium
Genes
Greenhouses
Herbal medicine
Humidity
Medicinal plants
MLSA
Morphology
Pathogenicity
Phylogenetics
Plant diseases
Polysaccharides
Rare species
RNA polymerase
Sequence analysis
Taxonomy
tiepishihu
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Summary:A rare plant species of the Orchidaceae family, Dendrobium officinale is considered among the top ten Chinese medicinal herbs for its polysaccharide. Since 2021, when the dieback disease of D. officinale was first reported in Yueqing City, Zhejiang Province, China, Fusarium isolates (number = 152) were obtained from 70 plants in commercial greenhouses. The disease incidence ranged from 40% to 60% in the surveyed areas. Multilocus sequence analysis (MLSA) coupled with morphological characterization revealed that the collected isolates belonged to five species (sp.), viz., Fusarium concentricum, F. fujikuroi, F. nirenbergiae, F. curvatum, and F. stilboides, with isolation frequencies of 34.6%, 22.3%, 18.4%, 13.8%, and 10.5%, respectively. Notably, at least two Fusarium species were simultaneously isolated and identified from the infected plants. Finally, the pathogenicity test results demonstrated that such species were responsible for the dieback disease of D. officinale. However, F. concentricum and F. fujikuroi were more invasive compared to the other species in this study. To the best of the authors’ knowledge, this study was the first report of F. concentricum, F. curvatum, F. fujikuroi, F. nirenbergiae, and F. stilboides causing the dieback disease of D. officinale in China and worldwide. This work provides valuable data about the diversity and pathogenicity of Fusarium populations, which will help in formulating effective strategies and policies for better control of the dieback disease.
ISSN:2309-608X
2309-608X
DOI:10.3390/jof8090919