식물병연구 (Research in Plant Disease)

한국식물병리학회 (The Korean Society of Plant Pathology)
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당근 검은잎마름병원균 Alternaria dauci의 포자 발아에 미치는 환경인자의 영향

Influence of Environmental Factors on Conidial Germination of Alternaria dauci

  • 박경훈 (국립농업과학원 유해생물과) ;
  • 윤혜정 (국립농업과학원 유해생물과) ;
  • 류경열 (국립농업과학원 유해생물과) ;
  • 윤종철 (국립농업과학원 유해생물과) ;
  • 김세리 (국립농업과학원 유해생물과) ;
  • 김원일 (국립농업과학원 유해생물과) ;
  • 김두호 (국립농업과학원 유해생물과) ;
  • 권영석 (국립식량과학원 기획조정과) ;
  • 차병진 (충북대학교 식물의학과)
  • Park, Kyeong-Hun (Microbial Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Yun, Hye-Jeong (Microbial Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Ryu, Kyoung-Yul (Microbial Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Yun, Jeong-Chul (Microbial Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Se-Ri (Microbial Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Won-Il (Microbial Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kim, Doo-Ho (Microbial Safety Division, National Academy of Agricultural Science, Rural Development Administration) ;
  • Kwon, Young-Seok (Planning and Coordination Division, National Institute of Crop Science, Rural Development Administration) ;
  • Cha, Byeong-Jin (Department of Plant Medicine, Chungbuk National University)
  • 투고 : 2011.10.07
  • 심사 : 2011.12.06
  • 발행 : 2011.12.31
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초록

본 실험에서는 당근 검은잎마름원균의 포자 발아 및 생존에 영향을 끼치는 온도, 상대습도, pH와 건조시간에 대하여 조사하였다. 분생포자의 발아는 $15-25^{\circ}C$ 사이에서 95% 이상의 상대습도 조건에서 촉진되었으나, $5^{\circ}C$에서는 상대습도와 상관없이 발아율이 급격히 감소하였다. 병원균의 분생포자 발아를 촉진하는 최적 환경조건은 습도 95% 이상, 온도 $15-25^{\circ}C$, pH 7.0 및 당근 잎 추출물 0.2%로 확인되었다. 또한 분생포자는 건조시간이 경과함에 따라 발아율이 감소하는 경향을 나타내었다. 그러나 분생포자는 수분 없이 12시간까지 생존 가능하였으며, 수분이 재공급될 경우에는 10% 정도의 발아율을 보였다. 이러한 결과는 A. dauci의 포자 발아 및 발생 생태를 이해하는데 유용한 정보를 제공할 것으로 생각된다.

Effects of temperatures, relative humidity, pH, and dry periods on conidial germination of Alternaria dauci were evaluated under in vitro conditions. Conidial germination was accelerated at over 95% relative humidity in $15^{\circ}C$ to $25^{\circ}C$ condition. Conidial germination was rapidly reduced at 5 regardless of relative humidity conditions. More than 50% of the conidial germination were initiated within 2 h at $25^{\circ}C$ through pH 5 to 7. The highest conidial germination of A. dauci was on 0.2% of carrot leaf extract. Conidia could survive longer than 12 h, even though its germination decreased. After a 12 h dry period, around 10% of conidia revived and germinated when conidia were hydrated again. These results could be used as the useful information on conidial germination of A. dauci and ecology of Alternaria leaf blight.

키워드

참고문헌

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