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Calonectria ilicicola의 병원성과 배양적 특성간의 상호관계
Relationship between Virulence and Cultural Characteristics in Calonectria ilicicola

Kim, K.D.   (Department of Agricultural Biology, Korea UniversityUU0000159  ); Russin, J.S.    (남일리노이대 식물 및 토양학과   ); Snow, J.P.    (루이지애나주립대 식물병리 및 생리학과   ); Valverde, R.A.    (루이지애나주립대 식물병리 및 생리학과  );
  • 초록

    여러가지 기주에서 유쾌한 Calonectria ilicicola 균주의 병원성에 대한 형태적, 유전적 표지를 검출하기 위하여 균사생장, 균핵, 자낭각 그리고 dsRNA를 조사하였다. 시험된 모든 균주에서 병원성, 균핵수, 자낭각수 와 균사생장 등의 다양한 변이가 관찰되었으나 dsRNA는 검출되지 않았다. 균의 병원성은 균핵과 자낭각 생산과 각각 정의 상관관계가 있었으나, 균사 생장은 자낭각의 생산과 부의 상관관계를 보여 주었다. 땅콩에서 유래한 균주보다 콩에서 유래한 균주가 기주인 콩에 더 강한 병원성을 보였으며 균핵과 자낭각의 생산도 더 많았다. 이와 같은 결과로 볼 때 C. ilicicla의 균핵과 자낭각 생산력은 inoculum potential의 구성요소로써 작용하며, 이중 균의 자낭각 생산력은 병원성과 기주 분화를 나타내는데 유용한 표지로써 이용될 수 있을 것이다.


    Mycelial growth, production of microsclerotia and perithecia, and presence of double-stranded RNA were examined in Calonectria ilicicola isolates from several hosts to detect morphological and/or genetic markers for comparison with levels of virulence. Variability in disease severity, production of microsclerotia and perithecia, and mycelial growth was observed across all isolates. None of 35 isolates of C. ilicicola examined contained detectable levels of double-stranded RNA. Disease severity on soybean cultivars correlated positively with production of both microsclerotia and perithecia. Mycelial growth correlated negatively with production of perithecia. Virulence on the cultivars and production of microsclerotia and perithecia were greater in isolates of C. ilicicola from soybean than those from peanut. These results suggest that the ability of isolates to produce microsclerotia and perithecia is a component of inoculum potential. Perithecia production may serve as a useful marker for characterizing virulence or host specialization in this homothallic fungus.


  • 주제어

    Calonectria crotalariae .   Cultural characteristics .   Cylindrocladium parasiticum .   Inoculum potential .   Red crown rot.  

  • 참고문헌 (25)

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