Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Assessment of Virulence of Raffaelea quercus-mongolicae and Raffaelea spp. Isolates by Artificial Inoculation of Quercus mongolica Logs

Raffaelea quercus-mongolicae와 Raffaelea spp. 인공접종에 의한 신갈나무 줄기에서의 병원성 평가

  • Son, Su-Yeon (Division of Forest Diseases & Insect Pests, Korea Forest Research Institute) ;
  • Seo, Sang-Tae (Division of Forest Diseases & Insect Pests, Korea Forest Research Institute) ;
  • Park, Hyung-Cheol (Division of Forest Diseases & Insect Pests, Korea Forest Research Institute)
  • 손수연 (국립산림과학원 산림병해충연구과) ;
  • 서상태 (국립산림과학원 산림병해충연구과) ;
  • 박형철 (국립산림과학원 산림병해충연구과)
  • Received : 2014.08.12
  • Accepted : 2014.10.31
  • Published : 2014.12.31
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Abstract

Division of Forest Diseases & Insect Pests, Korea Forest Research Institute, Seoul 130-712, Korea The objective of this study was to evaluate the virulence of geographically different isolates of oak wilt pathogen, Raffaelea quercus-mongolicae and other Raffaelea species. In this study, mature trees of Quercus mongolica were inoculated with the various isolates of Raffaelea spp. and their virulence was evaluated by measuring the extent of sapwood discoloration resulting from the inoculation. The average length of discolored sapwood in a lateral direction was longest in the trees inoculated with the isolates from Korea (8.69 cm) followed by R. quercivora (7.51 cm) and the other Raffaelea spp. (3.35 cm). The lateral length of discolored sapwood caused by the inoculation with Korean strains varied from 4.71 to 14.90 cm indicating their differences in virulence. The area of discolored sapwood caused by the inoculation with Raffaelea spp. varied from 1.57 to $8.42cm^2$ indicating their differences in virulence. Based on the length and area of the discolored sapwoods, isolated YY and wj43 appeared to have the highest virulence among all the Raffaelea isolates tested. Each of the two isolates was obtained from Gangwon Province and Jeonbuk Province, respectively.

본 연구의 목적은 신갈나무에서 참나무시들음병 병원균인 Raffaelea quercus-mongolicae의 지역별 균주와 기타 Raffaelea 속 근연종의 병원성을 평가하는 것이다. 이 연구에서는 신갈나무에 다양한 균주를 접종한 후, 변재부 내 변색정도로 각 균주의 병원성을 판단하였다. 그 결과 변색부의 평균 측면 확산 정도는 국내에서 분리한 Raffaelea quercus-mongolicae 병원균(8.69 cm)이 일본 병원균(7.51 cm)이나 기타 Raffaelea 속 근연종(3.35 cm)의 평균보다 높았고, 국내 지역별 Raffaelea quercusmongolicae 균주간에는 변색부 측면 확산정도가 4.71-14.90 cm로 병원성의 차이를 보였다. 균주간의 변색부 면적 확산정도는 $1.57-8.42cm^2$로 서로 다른 병원성의 차이를 보였으며, 가장 높은 병원성은 강원도에서 분리한 YY와 전라북도에서 분리한 wj43에서 나타났다.

Keywords

References

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