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Different Responses of Zoysiagrass (Zoysia spp.) Ecotypes against Puccinia zoysiae Causing Rust Disease in Field

포장에서 녹병 병원균인 Puccinia zoysiae에 대한 한국잔디의 종별 상이한 반응

  • Sung, Chang Hyun (Turfgrass Science Institute, Hanul Inc.) ;
  • Lee, Jeong Ho (Department of Golf Course Management, Korea Golf University) ;
  • Koo, Jun Hak (Turfgrass Science Institute, Hanul Inc.) ;
  • Hong, Jeum Kyu (Department of Horticultural Science, Gyeongnam National University of Science and Technology (GNTech)) ;
  • Youn, Jeong Ho (Turfgrass Science Institute, Hanul Inc.) ;
  • Chang, Seog Won (Department of Golf Course Management, Korea Golf University)
  • 성창현 ((주)한울 기업부설 잔디과학연구소) ;
  • 이정호 (한국골프대학 골프코스매니지먼트과) ;
  • 구준학 ((주)한울 기업부설 잔디과학연구소) ;
  • 홍점규 (경남과학기술대학교 원예학과) ;
  • 윤정호 ((주)한울 기업부설 잔디과학연구소) ;
  • 장석원 (한국골프대학 골프코스매니지먼트과)
  • Received : 2016.09.10
  • Accepted : 2016.12.06
  • Published : 2016.12.31

Abstract

An obligate plant pathogenic fungus Puccinia zoysiae Dietel, the causal agent of rust disease, which is implicated in the damage of zoysiagrass (Zoysia spp.) in Korea. The fungus is one of the important pathogens, which attacks and colonizes susceptible zoysiagrass. Zoysia rust disease was observed in Jangseong, Hoengseong and Hapcheon in 2014 and 2015, Korea. The typical symptoms of the disease appeared first as small white spots on the leaf and stem of zoysiagrass plants, and turn brownish, dark brown spores revealed on the lesions. Uredospores were light brown in color, ellipsoid or spherical in shape and $22.0{\sim}25.0{\times}15.0{\sim}17.5{\mu}m$ in size. On the basis of the morphological characteristics, the fungus was identified as P. zoysiae. Pathogenicity of the fungus was proved by artificial inoculation on Z. japonica. The rust disease firstly appeared approx. early or middle June and then increased middle of October in Korea. In field, Z. matrella ecotypes were more resistant than Z. japonica ecotypes against the pathogen. Disease response against the pathogen was different among ecotypes of each species, respectively.

활물기생 병원성 진균류인 Puccinia zoysiae는 한국에서 한국잔디류(Zoysia spp.)에 녹병을 일으켜 피해를 준다. 그 곰팡이는 감수성 한국잔디의 잎과 줄기에 병을 일으키는 병원균들 중 하나이다. 한국잔디 녹병이 2014년과 2015년 경남 합천, 충북 음성, 경기 양주에서 발견되었다. 포장에서 한국잔디 녹병은 잎에 작은 하얀 반점으로 나타나고 갈색으로 변한 후 여름 포자가 형성되는 전형적인 증상을 나타냈다. 여름포자는 연한 갈색으로 원형 또는 타원형으로 크기는 $22.0{\sim}25.0{\times}15.0{\sim}17.5{\mu}m$의 범위였다. 채집한 여름포자로부터 들잔디에 대한 병원성이 확인되었고, 형태적인 특성을 기초로 병원균은 P. zoysiae로 동정되었다. 우리나라에서 한국잔디 녹병은 6월 중순부터 10월 중순까지 관찰되었다. 포장에서 금잔디는 들잔디에 비해 지역에 관계없이 상대적으로 저항성을 보였고, 금잔디와 들잔디 모두 계통 간에 병 반응에서 차이를 나타냈다.

Keywords

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