The Plant Pathology Journal

The Korean Society of Plant Pathology (한국식물병리학회)
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Ecopathological Analysis of Apple stem grooving virus-K Harboring Talaromyces flavus

  • Shim Hye-Kyung (Department of Genetic Engineering, Sungkyunkwan University) ;
  • Hwang Kyu-Hyon (Department of Genetic Engineering, Sungkyunkwan University) ;
  • Shim Chang-Ki (Organic Farming Technology Division, National Institute of Agricultural Science and Technology, Rural Development Administration (RDA)) ;
  • Hong Seung-Beom (Microbial Genetics Division, National Institute of Agricultural Biotechnology, RDA) ;
  • Son Su-Wan (Department of Genetic Engineering, Sungkyunkwan University) ;
  • Kim Dong-Giun (Environmental Biotechnology National Core Research Center and Division of Applied Life Science, Gyeongsang National University) ;
  • Choi Yong-Mun (Pear Experiment Station, National Horticultural Research Institute, RDA) ;
  • Chung Young-Jae (Department of Biology, Seonam University) ;
  • Kim Dae-Hyun (Evaluation Coordination Officer, Planning and Management Officer, RDA) ;
  • Jee Hyeong-Jin (Organic Farming Technology Division, National Institute of Agricultural Science and Technology, Rural Development Administration (RDA)) ;
  • Lee Suk-Chan (Department of Genetic Engineering, Sungkyunkwan University)
  • Published : 2006.09.01
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Abstract

Pear black necrotic leaf spot (PBNLS) on pear trees (Pyrus pyrifolia) is caused by a Korean isolate of Apple stem grooving virus (ASGV-K). Yellow spots were detected in Phaseolus vulgaris (kidney bean) and Chenopodium quinoa which were grown near the diseased pears in year 2000 through 2003. The ASGV-K, the causative agent of PBNLS, was detected from the symptoms of the diseased kidney bean plant and C. quinoa. ASGV-harboring fungi were also isolated from symptomatic plants and from soils surrounding the infected plants. The ASGV-harboring fungus was identified and characterized as Talaromyces flavus. Ecopathological studies showed that the number of ASGV-harboring fungi on the pear leaves was not correlated with differences in temperature or severity of symptoms. Additionally, there was no difference in fungus frequency among the orchard locations or different host plants. Although the frequency of fungi isolated from the soil was not affected by changes in temperature or location, the fungi occurred at higher densities in the rhizosphere than in the plants themselves.

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