Didymella sp.에 의한 고사리 신규 마름병 발생 보고open accessFirst Report of a Bracken Blight Disease Caused by Didymella sp.
- Other Titles
- First Report of a Bracken Blight Disease Caused by Didymella sp.
- Authors
- 이정은; 김기범; 박주은; 김다운; 신유경; 윤성환; 정영륜
- Issue Date
- 2019
- Publisher
- 한국식물병리학회
- Keywords
- Bracken; Bracken blight disease; Didymella sp.
- Citation
- 식물병 연구, v.25, no.3, pp 143 - 148
- Pages
- 6
- Journal Title
- 식물병 연구
- Volume
- 25
- Number
- 3
- Start Page
- 143
- End Page
- 148
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/5022
- DOI
- 10.5423/RPD.2019.25.3.143
- ISSN
- 1598-2262
2233-9191
- Abstract
- An outbreak of new disease with leaf and stem blight symptom occurred at bracken-growing fields in Namhae-gun, Gyeongsangnam-do, Korea during the last 4 years. This new disease caused significant yield losses on bracken production in this area. We have collected diseased leaves and stems showing the blight symptom in May, July, and October 2018 to investigate causal pathogens. A total of 92 fungal isolates were obtained from the diseased samples and their pathogenicity was tested on healthy bracken leaves. From the total isolates, 22 isolates were able to produce the leaf blight symptom similar to the original one found in the fields. To identify two fungal pathogens which showed higher virulence levels compared to other pathogenic isolates, we constructed phylogenetic trees using the nucleotide sequences of genes for ribosomal RNA, RNA polymerase beta subunit, beta tubulin, and internal transcribed region. Most phylogenetic trees constructed indicate that both isolates, which are identical to each other, reside in a clade of the genus Didymella and possibly similar to D. rumicicola or D. acetosellae. Nevertheless, the exact identification of these pathogens at the species level needs further investigations. This is the first report of a blight disease on bracken by Didymella sp.
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