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Diversity and Distribution of Colletotrichum Species Causing Anthracnose in China

Summary

Researchers identified 16 different species of Colletotrichum fungi causing anthracnose (a leaf and branch disease) in plants across five Chinese provinces. They discovered four previously unknown species and clarified the classification of several known species using DNA analysis. The study found that different regions had different predominant fungal species, with walnut being particularly susceptible to specific Colletotrichum species. These findings help understand and manage anthracnose diseases in economically important plants in China.

Background

Colletotrichum is one of the top ten global phytopathogenic genera, causing anthracnose in plants. The genus exhibits morphological variation that makes species identification difficult, requiring molecular approaches. Previous research identified high-frequency Colletotrichum species in China, particularly affecting economically important woody plants such as walnut, Camellia oleifera, and Cinnamomum camphora.

Objective

To systematically investigate and identify pathogenic fungi causing anthracnose on economically important plants across multiple Chinese provinces and determine species composition, geographic distribution patterns, and host preferences. The study aimed to explore ecological isolation and coevolution between hosts and anthracnose fungi.

Results

Sixteen Colletotrichum species were identified, belonging to six species complexes. Four novel species were described: C. aquilariae, C. crataegi, C. dongguanense, and C. flavosporum. Twelve known species were confirmed, with several new synonyms proposed. Geographic analysis revealed greatest diversity in Beijing, novel species primarily from Guangdong, and C. gloeosporioides as the most widely distributed species on walnut. Ten new host records were reported.

Conclusion

The study provides comprehensive pathogen composition and distribution data for anthracnose diseases in China. The findings establish crucial understanding of pathogen diversity, distinct geographical distribution patterns, and host preferences. The research contributes to foundation knowledge for managing anthracnose diseases affecting plants in China, particularly walnut.
  • Published in:Journal of Fungi,
  • Study Type:Taxonomic and Epidemiological Survey,
  • Source: PMID: 41295162, doi: 10.3390/jof11110781
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