Mycobiology

The Korean Society of Mycology (한국균학회)
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Didymella gigantis sp. nov. Causing Leaf Spot in Korean Angelica

  • Gyo-Bin Lee (Global Agro-Consulting Corporation) ;
  • Ki Deok Kim (Laboratory of Plant Disease and Biocontrol, College of Life Sciences and Biotechnology, Korea University) ;
  • Weon-Dae Cho (Global Agro-Consulting Corporation) ;
  • Wan-Gyu Kim (Global Agro-Consulting Corporation)
  • Received : 2023.06.28
  • Accepted : 2023.11.24
  • Published : 2023.12.31
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Abstract

During a disease survey in October 2019, leaf spot symptoms with a yellow halo were observed on Korean angelica (Anglica gigas) plants grown in fields in Pyeongchang, Gangwon Province, Korea. Incidence of diseased leaves of the plants in the investigated fields ranged from 10% to 60%. Morphological and cultural characteristics of two single-spore isolates from the leaf lesions indicated that they belonged to the genus Didymella. Molecular phylogenetic analyses using combined sequences of LSU, ITS, TUB2, and RPB2 regions showed distinct clustering of the isolates from other Didymella species. In addition, the morphological and cultural characteristics of the isolates were somewhat different from those of closely related Didymella spp. Therefore, the novelty of the isolates was proved based on the investigations. Pathogenicity of the novel Didymella species isolates was confirmed on leaves of Korean angelica plants via artificial inoculation. This study reveals that Didymella gigantis sp. nov. causes leaf spot in Korean angelica.

Keywords

Acknowledgement

This study was supported by a research grant (PJ014507012019) from the Rural Development Administration, Korea.

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