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Didymellaceae species associated with tea plant (Camellia sinensis) in China

Summary

Researchers identified 25 different fungal species from the Didymellaceae family that can infect tea plant leaves in China, including six previously unknown species. By testing how harmful these fungi are to tea plants, they found that some species cause severe damage while others are harmless. These findings help tea farmers understand and manage leaf blight disease that threatens tea crop production.

Background

Didymellaceae fungi cause leaf blight disease in tea plants, an important commercial crop. While previous studies reported some Didymellaceae species on tea plants, comprehensive understanding of biodiversity and pathogenicity remains limited. This study systematically investigates Didymellaceae species associated with tea plant leaves across multiple Chinese provinces.

Objective

To clarify the classification and determine biodiversity of Didymellaceae species on tea plants using phylogenetic analysis based on multi-locus DNA sequences (ITS, LSU, RPB2, TUB2). Additionally, to evaluate the pathogenicity of isolates on tea plant leaves to identify dominant species associated with leaf blight disease.

Results

Analysis identified 25 species from six genera (Didymella, Epicoccum, Neoascochyta, Paraboeremia, Remotididymella, Stagonosporopsis), including 19 known species and 6 novel species. Didymella segeticola was the most dominant species. Pathogenicity tests showed Epicoccum anhuiense had the strongest virulence while E. puerense had the weakest, with 13 species being non-pathogenic to tea plants.

Conclusion

The study provides comprehensive characterization of Didymellaceae diversity on tea plants in China, identifying new species and establishing pathogenicity profiles. Results enhance understanding of pathogens causing leaf blight disease and provide foundational knowledge for disease management strategies.
  • Published in:MycoKeys,
  • Study Type:Taxonomic Survey and Pathogenicity Assessment,
  • Source: 10.3897/mycokeys.105.119536
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