The Korean Journal of Mycology (한국균학회지)

The Korean Society of Mycology (한국균학회)
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Black Mold on Tomato Fruits Caused by Alternaria alternata in Korea

한국 내 Alternaria alternata에 의한 토마토 과실 검은곰팡이병

  • Received : 2020.09.01
  • Accepted : 2020.11.10
  • Published : 2020.12.31
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Abstract

Black mold was frequently observed on tomatoes grown in a greenhouse in Suwon, Korea in July 2018. The incidence of the disease was 5.0-25.0% (average 12.3%) and 2.0-7.0% (average 3.7%) in the context of tomato and cherry tomato fruits, respectively. Sixteen single-spore isolates of Alternaria sp. were obtained from the diseased fruits and investigated for their morphological characteristics. Among the isolates, eight were used for sequencing analysis. All of the isolates were identified as Alternaria alternata based on their morphological and molecular characteristics. The pathogenicity of four isolates of A. alternata was investigated using three varieties each of tomato and cherry tomato via artificial inoculation. All of the isolates induced black mold symptoms on the inoculated tomato fruits. Notably, the symptoms were similar to those observed in the greenhouse. However, the pathogenicity tests revealed that different tomato varieties presented distinct patterns of susceptibility to the isolates. This is the first report of A. alternata causing black mold on tomato fruits in Korea.

2018년 7월에 한국의 수원에 있는 온실 재배 토마토의 과실에서 검은곰팡이병이 빈번하게 관찰되어 발생률을 조사한 결과, 일반토마토에서 5.0-25.0%(평균 12.3%), 방울토마토에서 2.0-7.0%(평균 3.7%)였다. 병든 과실의 병반에서 16개의 Alternaria균을 단포자 분리하여 형태적 특성을 조사하고, 이 중에서 8균주를 공시하여 염기서열 분석을 실시하였다. 분리 균주들에 대한 형태적 및 분자생물학적 특성을 조사한 결과, 모두 Alternaria alternata로 동정되었다. 4균주의 A. alternata를 공시하여 각각 3품종의 일반토마토와 방울토마토 과실에 대한 병원성 검정을 실시한 결과, 접종 균주 모두 온실에서 관찰된 것과 같은 검은곰팡이병 증상을 유발하였다. 또한 병원성 검정 결과, 공시 토마토 품종들의 과실은 접종 균주들에 대한 감수성에 있어서 차이가 있는 것으로 나타났다. 본 연구 결과, 한국 내 A. alternata에 의한 토마토 과실의 검은곰팡이병 발생을 처음으로 보고한다.

Keywords

References

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