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First report of yeast spot caused by <i>Eremothecium coryli</i> on soybean in South Korea

Authors
Choi, OkheeNoh, HaeunKang, YongsungChun, Hyun JinKim, Min ChulKim, Jinwoo
Issue Date
Dec-2023
Publisher
TAYLOR & FRANCIS INC
Keywords
Eremothecium coryli; Glycine max; ITS; stink bug; yeast spot
Citation
CANADIAN JOURNAL OF PLANT PATHOLOGY
Indexed
SCIE
SCOPUS
Journal Title
CANADIAN JOURNAL OF PLANT PATHOLOGY
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/68964
DOI
10.1080/07060661.2023.2287164
ISSN
0706-0661
1715-2992
Abstract
An ascomycete yeast was isolated from tissue cultures of soybean explants (cv. Williams 82) exhibiting blanching and discoloration. Stink bug damage was confirmed in soybean seeds that were grown and harvested simultaneously in the same field as the soybeans used for tissue culture, and the same yeast was isolated from areas of stink bug damage, indicating seed contamination. The seed infection rate was 20%, and all infected seeds had been damaged by stink bugs. The yeast was identified as Eremothecium coryli (Peglion) Kurtzman based on morphological and biochemical characteristics and homology analysis of the internal transcribed spacer sequence of the ribosomal RNA gene and the large ribosomal subunit D1/D2 domain regions. Disease symptoms were reproduced by inoculating this yeast into healthy soybeans (cv. Williams 82). Eremothecium coryli has been reported to cause yeast spot disease in soybeans, but has not been reported in Korea. Among the fungicides recommended for plant tissue culture, we recommend imazalil for addressing E. coryli contamination. The results of this study suggest that yeast spot caused by E. coryli presents a significant risk to soybean production.
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