The Korean Journal of Mycology (한국균학회지)

The Korean Society of Mycology (한국균학회)
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First Report of an Apple Ring Rot Fungus Botryosphaeria kuwatsukai in Korea

  • Gwang-Jae Lim (College of Agriculture and Life Sciences, Kyungpook National University) ;
  • Kallol Das (College of Agriculture and Life Sciences, Kyungpook National University) ;
  • Hyeong-Jin Noh (Department of Microbiology, Dankook University) ;
  • Seong-Keun Lim (College of Agriculture and Life Sciences, Kyungpook National University) ;
  • Young-Je Cho (School of Food Science & Biotechnology/Food & Bio-Industry Research Institute, Kyungpook National University) ;
  • Seung-Yeol Lee (College of Agriculture and Life Sciences, Kyungpook National University) ;
  • Hee-Young Jung (College of Agriculture and Life Sciences, Kyungpook National University) ;
  • Seong Hwan Kim (Department of Microbiology, Dankook University)
  • Received : 2023.05.11
  • Accepted : 2023.06.28
  • Published : 2023.06.30
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Abstract

Three fungal strains designated as KNUF-23-MG32, KNUF-23-YC8, and KNUF-23-MJ82 were isolated from the abnormal symptomatic apple trees during screening fungal pathogens collected in Jeollanam-do and Gyeongsangbuk-do, Korea. These fungal strains were found to have similar cultural and morphological characteristics close to the genus Botryosphaeria. Morphological characteristics were matched with B. kuwatsukai CBS 135219 but different with B. dothidea KACC 45481 and B. sinensis HMAS 246714T. Pathogenicity tests of strain KNUF-23-MG32 showed that this strain causes rot in Fuji apples. Molecular phylogenetic analysis based on the sequences of the internal transcribed spacer (ITS) regions, translation elongation factor 1-alpha (TEF1α), and partial β-tubulin (TUB2) showed that these strains are B. kuwatsukai. To the best of our knowledge, this is the first report of an apple ring rot fungus Botryosphaeria kuwatsukai in Korea.

Keywords

Acknowledgement

This work was carried out with the support of the Cooperative Research Program for Agriculture Science & Technology Development (Project No. PJ016906). Rural Development Administration, Republic of Korea.

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