DOI QR코드

DOI QR Code

Rhizopus Soft Rot on Lily Caused by Rhizopus oryzae in Korea

Rhizopus oryzae에 의한 백합 무름병

  • Hahm, Soo-Sang (Agricultural Environment Research Division, Chungnam Agricultural Research and Extension Services) ;
  • Hong, Gye-Wan (Taean Lily Expt. Station, Chungnam Agricultural Research and Extension Services) ;
  • Kim, Byung-Ryun (Agricultural Environment Research Division, Chungnam Agricultural Research and Extension Services) ;
  • Han, Kwangseop (Agricultural Environment Research Division, Chungnam Agricultural Research and Extension Services) ;
  • Choi, Takyong (Taean Lily Expt. Station, Chungnam Agricultural Research and Extension Services) ;
  • Nam, Yungyu (Agricultural Environment Research Division, Chungnam Agricultural Research and Extension Services) ;
  • Yu, Seunghun (Department of Applied Biology, College of Agriculture and Life Sciences, Chungnam National University)
  • 함수상 (충남농업기술원 농업환경연구과) ;
  • 홍계완 (충남농업기술원 태안백합시험장) ;
  • 김병련 (충남농업기술원 농업환경연구과) ;
  • 한광섭 (충남농업기술원 농업환경연구과) ;
  • 최택용 (충남농업기술원 태안백합시험장) ;
  • 남윤규 (충남농업기술원 농업환경연구과) ;
  • 유승헌 (충남대학교 농업생명과학대학 응용생물학과)
  • Received : 2014.02.03
  • Accepted : 2014.03.19
  • Published : 2014.03.31

Abstract

Rhizopus soft rot of lily (Lilium longiflorum) caused by Rhizopus oryzae was observed in the experimental field in Taean Lily Experiment Station in Korea, 2012. The typical symptoms were water-soaked lesions on bottom stem and leaf rot. The lesion rapidly expanded and the plant was softened totally. The fungus grew vigorously at an optimum temperature ($25^{\circ}C$) and brownish colony and black sporangia were formed on potato dextrose agar medium. Sporangiophores formed on end of sporangia were sub-globose, brownish and $6-10{\mu}m$ in size. Sporangia were globose, blackish and $87-116{\mu}m$ in size. Sporangiospores were irregularly oval and sub-globose, brownish $4-8{\mu}m$ in size. On the basis of mycological characteristics, analyzing sequences of internal transcribed spacer region of ribosomal DNA, and pathogenicity test on host plants, the causal fungus was identified as R. oryzae. This is the first report of Rhizopus soft rot on lily caused by R. oryzae in Korea.

2012년 태안백합시험장 포장에 재배중인 절화 백합에서 이상증상이 발생하였다. 처음 병징은 토양 지제부의 줄기가 물러지고 점차 위쪽으로 진전되면서 결국 잎을 포함한 식물체 전체 적가 빠르게 부패되었다. 병원균의 균사생육 적온은 $25^{\circ}C$이며 PDA상에 왕성하게 생장하였으며, 갈색의 균총과 검은색의 포자낭을 형성하였다. 포자낭경은 초기에 흰색에서 점차 회색으로 되었으며 포자낭을 균사 끝에 형성하였고, 폭은 $6-10{\mu}m$이었다. 포자낭은 처음에 흰색에서 나중에 검은색으로 되었고, 모양은 반구형으로 크기는 $87-116{\mu}m$이었다. 포자낭포자는 담갈색으로 단포이며, 구형 또는 타원형으로 대부분 불규칙하며, 크기는 $4-8{\mu}m$이었다. 이상과 같이 병원균의 균학적 특징, ITS 염기서열 분석, 병원성 검정 결과 본 병해는 Rhizopus oryzae에 의한 백합 무름병으로 명명할 것을 제안한다.

Keywords

References

  1. Kwon, J. H., Kim, J. W., Hyun, J. W., Lee, Y. H. and Shim, H. S. 2011. Soft rot on citrus caused by Rhizopus oryzae in Korea. Res. Plant Dis. 17: 78-81. (In Korean) https://doi.org/10.5423/RPD.2011.17.1.078
  2. Lunn, J. A. 1977. Rhizopus oryzae. CMI descriptions of pathogenic fungi and bacteria. No. 525. Commonwealth Mycological Institute, Ferry Lane, Kew, Surrey, England.
  3. The Korean Society of Plant Pathology. 2009. List of Plant Disease in Korea. 5th ed., Suwon, Korea. 859 pp. (In Korean)