Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Development of an Efficient Mass-screening Method for Testing the Resistance of Radish to Fusarium Wilt

무 시들음병에 대한 간편한 대량 저항성 검정법 개발

  • Lee, Ji Hyun (Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology) ;
  • Jang, Kyoung Soo (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) ;
  • Choi, Gyung Ja (Center for Eco-friendly New Materials, Korea Research Institute of Chemical Technology)
  • 이지현 (한국화학연구원 친환경신물질연구센터) ;
  • 장경수 (한국화학연구원 친환경신물질연구센터) ;
  • 최용호 (한국화학연구원 친환경신물질연구센터) ;
  • 김헌 (한국화학연구원 친환경신물질연구센터) ;
  • 최경자 (한국화학연구원 친환경신물질연구센터)
  • Received : 2016.06.28
  • Accepted : 2016.08.13
  • Published : 2016.09.30
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Abstract

Root-dipping inoculation method has been used to investigate resistance of radish plants to Fusarium wilt. However, the method requires a lot of labor and time because of complicate procedure. This study was conducted to establish a simple and effective mass-screening method for resistant radish to Fusarium wilt. Radish seedlings of susceptible and resistant cultivars were used to investigate wounding method by scalpel, inoculum concentration, and pathogen-inoculated growth stage of seedlings. We established an efficient mass-screening method based on our results as following: Roots of 14-day-old seedlings of radish are cut with a scalpel at a $90^{\circ}$ angle to a 2 cm-depth at a 1 cm-distance from main stem and then inoculated by pouring with a 10 ml-aliquot of a fungal spore suspension ($1.0{\times}10^7conidia/ml$) on soil. The inoculated plants are cultivated in a growth room at $25^{\circ}C$ for about 4 weeks with 12-hour light a day. The proposed screening method enables to effectively select resistant from mass radish plants cultivars to Fusarium wilt.

무 시들음병 저항성 검정에는 대부분 뿌리 침지(root-dipping) 접종 방법을 사용하고 있지만, 이 방법은 복잡한 접종 과정 때문에 많은 노동력과 시간이 소요된다. 본 연구는 F. oxysporum f. sp. raphani에 의해 발생하는 무 시들음병의 간편 대량 저항성 검정법을 확립하기 위하여 수행하였다. 간편 저항성 검정법을 개발하기 위해 scalpel 접종 방법, 접종 농도 및 생장 단계에 따른 무 감수성 및 저항성 품종의 시들음병 발생을 조사하였다. 그리고 그 결과로부터 무 시들음병 대량 검정을 위한 효율적인 간편 저항성 검정방법으로 14일 동안 재배된 유묘에 scalpel을 사용하여 지제부에서 0.5 cm 떨어진 곳에서 $90^{\circ}$ 각도 2 cm 깊이로 찔러서 뿌리에 상처를 주고 포자현탁액($1.0{\times}10^7conidia/ml$)을 10 ml씩 관주하여 접종하고 $25^{\circ}C$에서 하루 12시간씩 광을 조사하면서 약 4주간 재배하는 것이 효율적이라고 생각되었다. 본 연구를 통해 확립한 접종방법은 대량의 무 시료로부터 시들음병에 대한 저항성 개체를 효과적으로 선발하는 것을 가능하게 할 것이다.

Keywords

References

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  1. Specific PCR detection of Fusarium oxysporum f. sp. raphani : a causal agent of Fusarium wilt on radish plants vol.65, pp.2, 2017, https://doi.org/10.1111/lam.12761