Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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Bean common mosaic virus and Peanut mottle virus isolated from Peanut in Korea

땅콩(Arachis hypogaea)에서 분리한 Bean common mosaic virus와 Peanut mottle virus

  • 구봉진 (영남대학교 이과대학 생물학과) ;
  • 신혜영 (영남대학교 이과대학 생물학과) ;
  • 성정현 (영남대학교 이과대학 생물학과) ;
  • 강동균 (경북농업기술원 생물자원연구소) ;
  • 장무웅 (영남대학교 이과대학 생물학과)
  • Published : 2002.08.01
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Abstract

For the survey of viruses infected in peanut cultivated in Korea, peanut seeds and leaves showing viral symptoms were collected from their growing areas. Typical symptoms on virus infected peanut leaves including mosaic, mottle with necrosis, yellowing, stripe or vein banding and stunts were observed. Two viruses isolated from the naturally infected peanuts were identified as Bean common mosaic virus(BCMV-PSt) and Peanut mottle virus(PeMoV) by their host range, immunosorbent elcetron microscopy(ISEM), direct immuno staining assay(DISA), RT-PCR, and intracellural symptoms. Direct negative staining method by electron microscope showed filamentous particles of about 780 m in length as well as inclusion bodies. In ultrathin sections of BCMV-PSt and PeMoV infected tissues, cytoplasmic cylindrical inclusions as well as filamentous virus particles were observed in the cytoplasm of parenchyma cells. ISEM revealed filamentous particles strongly decorated with antiserums of BCMV-PSt and PeMoV Peanut seeds were stained with BCMV-PSt and PeMoV antisera indicating the possibility of seed transmission far these viruses. Seedlings germinated from peanut seeds which reacted with antiserums of BCMV-PSt by DISA showed mild mottle or stripe symptoms while mosaic and necrotic mottle symptoms were observed for PeMoV-positive seedlings. Filamentous particles were strongly decorated with each antiserum under ISEM observation. BCMV-PSt coat protein gene of about 1.2 Kbp was amplified by RT-PCR. Altogether these results indicate that BCMV-PSt is the most prevalent virus infecting peanut in Korea.

한국산 땅콩에 감염되어 있는 바이러스를 동정하기 위하여 땅콩 재배지 에서 모자이크, 괴저를 동반한 얼룩무늬, 황화, 줄무늬, 엽맥녹대, 위축 등의 바이러스 감염 증상을 나타내는 땅콩잎 및 땅콩을 채집하였다. 이들 시료로부터 기주범위, 면역전자현미경(ISEM), 감염 세포내의 바이러스의 존재양식, direct immune staining assay(DISA), RT-PCR 등에 의하여 Bean common mosaic virus(BCMV-PSt)와 Peanut mottle virus(PeMoV)를 분리하였다. 이들 시료를 DN법에 의거하여 전자현미경으로 관찰한 바 길이가 약 780 nm의 사상형 입자와 세포질 봉입체를 관찰하였다. 초박절편의 시료 관찰에서도 길이 약 700 nm의 사상 입자가 엽육세포 등의 세포질과 액포에 산재 혹은 병행 배열로 존재해 있는 영상 및 세포질 봉입체가 반드시 확인되었다. 또한, 이들 시료를 BCMV-PSt와 PeMoV의 항혈청으로 ISEM을 실시한 결과, 두 항체에 모두 decoration 되었음을 확인하였다. 두 바이러스가 종자전염이 되는 지를 확인하기 위하여 땅콩을 직접 BCMV-PSt와 PeMoV의 항혈청으로 DISA를 실시하였다. 그 결과, BCMV-PSt 및 PeMoV 항혈청에 발색이 되었으며, 이들을 발아시켜 유식물체를 획득하였다. 이들 유식물체에서도 바이러스 감염 증상인 얼룩무늬 증상이 관찰되었고, 이들을 BCMV-PSt와 PeMoV의 항혈청으로 ISEM방법으로 검경한 결과, 두 항체에 모두 decoration 되었다. 또한, 자연감염 식물체 및 DISA에 의해 바이러스 감염이 확인된 종자를 발아시킨 2년생 식물체로부터 생물검정 법 및 ISEM에 의해 두 종의 바이러스가 검출되었다. Rl-PCR을 실시한 결과, 약 1.2Kb크기의 BCMV-PSt coat protein유전자가 증폭 되었다. 이 연구결과, 한국산 땅콩에 BCMV-PSt가 가장 많이 감염되어 있음을 확인하였다.

Keywords

References

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