Korean Journal of Organic Agriculture (한국유기농업학회지)

Korean Association of Organic Agriculture (한국유기농업학회)
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Correlation between Isolated Entomopathogenic Fungi and Soil Characteristics from Forest Areas of the Southwest Region in Korea

국내 서남 지역의 산림 토양 특성과 곤충병원성 진균과의 상관관계

  • 김회리 (국립순천대학교 생명산업과학대학 식물의학과) ;
  • 김형찬 (국립순천대학교 생명산업과학대학 식물의학과) ;
  • 이세진 (국립순천대학교 생명산업과학대학 농생명과학과)
  • Received : 2022.11.02
  • Accepted : 2022.12.15
  • Published : 2023.02.28
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Abstract

Entomopathogenic fungi are one of the microorganisms distributed worldwide, and they inhabit not only insects but also soils of various regions such as agricultural land and forest areas. In this study, entomopathogenic fungi distributed in the soil of forest areas in Korea were isolated using the insect-baiting method, and the relationship between the distribution and diversity of entomopathogenic fungi and the physical/chemical characteristics of the soil was analyzed. The soils were collected from five forest areas in Korea, and a total of 42 entomopathogenic fungal isolates were isolated from the collected soils. Among them, Beauveria bassiana (42.9%) and Metarhizium anisopliae (45.2%) were mainly isolated. In particular, it was confirmed that the distribution of M. anisopliae varies depending on the total nitrogen (g/kg) and organic matter content (%) of the soil. The soils in forest areas in Korea have a low pH of 4-5. Among all isolates, >50% of entomopathogenic fungi were isolated from silt loam. This study suggests that it will be helpful in understanding the relationship between the distribution and diversity of entomopathogenic fungi and the physical and chemical characteristics of soil.

본 논문에서는 국내 산림 지역의 토양에서 서식하는 곤충병원성 진균을 insect-baiting 방법을 이용하여 분리하고자 하였으며, 곤충병원성 진균과 토양의 물리적, 화학적 특성과의 관계를 분석하고자 하였다. 국내 산림 지역 5곳을 선정하여 토양을 채집하였으며, 채집된 토양에서 총 42 분리주를 분리하였다. 그 중 Beauveria bassiana (42.9%)와 Metarhizium anisopliae (45.2%)가 주로 분리되었으며, 특히 M. anisopliae의 분포는 토양의 총 질소량(g/kg)과 유기물 함량(%)에 따라 달라지는 것이 확인되었다. 국내 산림 지역의 토양은 낮은 pH를 보였으며(pH 4-5), 전체 분리주 중에서 미사질 양토(silt loam)에서 50% 이상이 분리되었다. 본 연구의 결과는 통하여 토양의 물리적, 화학적 특성과 곤충병원성 진균의 분포 및 다양성과의 관계를 이해하는데 도움이 될 것으로 판단된다.

Keywords

Acknowledgement

본 연구를 위해 토양을 분석해주신 강세원 교수님께 감사드립니다. 본 연구는 농촌진흥청 국립농업과학원 연구사업(PJ016387)의 지원에 의하여 이루어진 것임.

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