Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Development of an Efficient Bioassay Method for Testing Resistance to Bacterial Soft Rot of Chinese Cabbage

효율적인 배추 무름병 저항성 검정법 개발

  • Lee, Soo Min (Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology) ;
  • Choi, Yong Ho (Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology) ;
  • Kim, Hun (Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology) ;
  • Kim, Heung Tae (Department of Plant Medicine, Chungbuk National University) ;
  • Choi, Gyung Ja (Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology)
  • 이수민 (한국화학연구원 친환경신물질연구센터) ;
  • 최용호 (한국화학연구원 친환경신물질연구센터) ;
  • 김헌 (한국화학연구원 친환경신물질연구센터) ;
  • 김흥태 (충북대학교 식물의학과) ;
  • 최경자 (한국화학연구원 친환경신물질연구센터)
  • Received : 2020.08.14
  • Accepted : 2020.09.04
  • Published : 2020.09.30
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Abstract

Pectobacterium carotovorum subsp. carotovorum (Pcc) causes bacterial soft rot on a wide range of crops worldwide, especially in countries with warm and humid climates. This study was conducted to establish an efficient screening method for resistant cultivars of Chinese cabbage to bacterial soft rot. Resistance degrees of 65 commercial Chinese cabbage cultivars to the Pcc KACC 10225 isolate were investigated. For further study, three Chinse cabbage cultivars (Taebong, Hadaejangkun, CR Alchan) showing different level of resistance to the bacterium were selected. The development of bacterial soft rot on the cultivars was tested according to several conditions such as growth stage of Chinse cabbage seedling, inoculum concentration, and incubation temperature after inoculation. On the basis of the results, we suggest that an efficient screening method for resistant Chinses cabbage to Pcc is to inoculate twenty one-day-old seedlings with a bacterial suspension of Pcc at a concentration of 1×107 cfu/ml, and to incubate the plants in a dew chamber at 25℃ for 24 hr and then to cultivate in a growth room at 25℃ and 80% relative humidity with 12-hr light per day.

Pactobacterium carotovorum subsp. carotovorum (Pcc)에 의한 무름병은 전세계적으로 문제가 되고 있고 특히 온난 다습한 지역에서 문제가 심각하다. 본 연구는 Pcc에 의해 발생하는 배추 무름병에 대한 효율적인 저항성 검정법을 확립하기 위하여 실험하였다. 시판 배추 품종 65개의 Pcc KACC 10225에 대한 저항성 정도를 조사하고, 추후 실험을 위해 저항성에 차이를 보이는 3개 품종을 선발하였다. 이들 3개 품종의 접종하는 배추의 생육 시기, 접종원 농도, 접종 후 재배 온도 등의 발병 조건에 따른 무름병 발생을 조사하였다. 이들 실험의 결과로부터 배추의 무름병에 대한 저항성을 검정하기 위해서는, 배추 종자를 파종하고 온실(25±5℃)에서 21일 동안 재배한 유묘에 Pcc 균주의 세균현탁액(1×107 cfu/ml)을 식물체 기부에 5 ml씩 관주하여 접종하고, 접종한 식물은 25℃ 습실상에 24시간 동안 배양한 후에 25℃, 상대습도 80%의 생육상으로 이동하여 재배하는 것을 제안하고자 한다.

Keywords

References

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