Research in Plant Disease (식물병연구)

The Korean Society of Plant Pathology (한국식물병리학회)
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First Report of Tomato Spotted Wilt Virus on Iris domestica in South Korea

약용작물 범부채에 발생한 Tomato Spotted Wilt Virus 국내 첫 보고

  • Chung, Bong Nam (Horticultural and Herbal Crop Environment Division, National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Yoon, Ju-Yeon (Horticultural and Herbal Crop Environment Division, National Institute of Horticultural and Herbal Science, Rural Development Administration) ;
  • Cho, In-Sook (Horticultural and Herbal Crop Environment Division, National Institute of Horticultural and Herbal Science, Rural Development Administration)
  • 정봉남 (농촌진흥청 국립원예특작과학원 원예특작환경과) ;
  • 윤주연 (농촌진흥청 국립원예특작과학원 원예특작환경과) ;
  • 조인숙 (농촌진흥청 국립원예특작과학원 원예특작환경과)
  • Received : 2021.02.06
  • Accepted : 2021.03.14
  • Published : 2021.03.31
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Abstract

In May 2020, necrosis and necrotic ring patterns were observed on leaves of three of 140 Iris domestica plants in a demonstration garden in Wanju, Jeollabuk-do. Three symptomatic plants were found to be infected by tomato spotted wilt virus (TSWV). To analyze the whole genomic sequence of one TSWV isolate, 'Blackberry lily-kr1', L, M, and S genome segments were sequenced and analyzed by comparison of nucleotide sequences of the three segments with corresponding sequences of other TSWV isolates. 'Blackberry lily-kr1' isolate was most closely related to 'JJ' isolate (MF159046) or 'HJ' isolate (LC273305) in the L segment, and to 'JJ' isolate (MF159058 and KY021439) in the M and S segments, respectively. Phylogenetic analysis by Maximum likelihood method using MEGA X program with 'Blackberry lily-kr1' isolate showed high relationship with 'JJ' pepper isolate or 'HJ' Humulus japonicas isolate in the all three segment. Necrosis and double ring patterns on leaves were formed in the glasshouse after inoculation of healthy I. domestica plants with sap of 'Blackberry lily-kr1'-infected Nicotiana rustica plants. This result suggests that I. domestica plants showing necrotic ring patterns in the open field are caused by TSWV infection. This is the first report of TSWV infection of I. domestica in Korea.

2020년 전라북도 완주 소재 약용작물 전시포장에서 재배중인 범부채(Iris domestica) 140개체 가운데 3개체의 잎에서 괴사증상이 발견되었다. Reverse transcription polymerase chain reaction 검정결과 증상을 나타내는 3개체가 tomato spotted wilt virus (TSWV)에 감염된 것으로 확인되었다. 증상주로부터 분리한 TSWV 분리주 'Blackberry lily-kr1'의 전체 염기서열을 결정하였으며, 유전자 은행에 있는 다른 분리주들과 L, M, S 분절유전체 부위의 염기서열 상동성을 비교하였다. 'Blackberry lily-kr1' 분리주는 L 분절 유전체는 우리나라에서 보고한 'JJ' 분리주(MF159046) 또는 'HJ' (LC273305) 분리주와 상동성이 높았으며, M과 S 분절 유전체는 'JJ' 분리주(MF159058과 KY021439)와 가장 상동성이 높았다. MEGA X 프로그램의 maximum likelihood 방법을 이용하여 'Blackberry lily-kr1'의 다른 TSWV 분리주들과의 계통학적 연관성에 관한 분석을 한 결과 L, M, S 분절유전체 모두 고추에서 분리한 'JJ' 분리주 및 환삼덩굴(Humulus japonicas)에서 분리한 'HJ' 분리주와 높은 연관성을 보였다. 건전한 I. domestica 식물에 'Blackberry lily-kr1'을 감염시킨 Nicoatiana rustica 식물 즙액을 접종한 결과 50일 후에 잎에 괴사 또는 이중 고리형태의 괴사 증상이 형성되었다. 이는 노지에서 재배하는 범부채에서 관찰된 괴사증상이 TSWV 감염에 의한 것임을 시사하는 결과이다. 이 연구는 우리나라에서 범부채에서 TSWV 발생에 관한 최초의 보고이다.

Keywords

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