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Diversity Census of Fungi in the Ruminal Microbiome: A meta-analysis

반추위 곰팡이 다양성 조사 : 메타분석

  • Song, Jaeyong (Animal Nutrition and Physiology Team, National Institute of Animal Science) ;
  • Jeong, Jin Young (Animal Nutrition and Physiology Team, National Institute of Animal Science) ;
  • Kim, Minseok (Animal Nutrition and Physiology Team, National Institute of Animal Science)
  • 송재용 (국립축산과학원 영양생리팀) ;
  • 정진영 (국립축산과학원 영양생리팀) ;
  • 김민석 (국립축산과학원 영양생리팀)
  • Received : 2017.10.23
  • Accepted : 2017.12.08
  • Published : 2017.12.31
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Abstract

This study was designed to examine the diversity census of fungi in rumen microbiome via meta-analysis of fungal 28S rDNA sequences. Both terms, "rumen" and "ruminal," were searched to retrieve the sequences of rumen fungi. As of September 2016, these sequences (n=165) of ruminal origin were retrieved from the Ribosomal Database Project (RDP; http://rdp.cme.msu.edu), an archive of all 28S rDNA sequences and were assigned to the phyla Ascomycota, Neocallimastigomycota, and Basidiomycota, which accounted for 109, 48, and 8 of the 165 sequences, respectively. Ascomycota sequences were assigned to the genera Pseudonectria, Magnaporthe, Alternaria, Cochliobolus, Cladosporium, and Davidiella, including fungal plant pathogens or mycotoxigenic species. Moreover, Basidiomycota sequences were assigned to the genera Thanatephorus and Cryptococcus, including fungal plant pathogens. Furthermore, Neocallimastigomycota sequences were assigned to the genera Cyllamyces, Neocallimastix, Anaeromyces, Caecomyces, Orpinomyces, and Piromyces, which may degrade the major structural carbohydrates of the ingested plant material. This study provided a collective view of the rumen fungal diversity using a meta-analysis of 28S rDNA sequences. The present results will provide a direction for further studies on ruminal fungi and be applicable to the development of new analytic tools.

본 연구의 목적은 곰팡이 28S rDNA 염기서열의 메타분석을 통하여 반추위 곰팡이의 다양성을 조사하는데 있다. 'rumen'과 'ruminal'이 반추위 곰팡이 유래 염기서열들을 회수하기 위한 검색어로 사용되었다. 2016년 9월부로 모든 28S rDNA 염기서열이 보관되어 있는 Ribosomal Database Project(RDP, http://rdp.cme.msu.edu) 데이터베이스에서 반추위 곰팡이 유래 28S rDNA 유전자 염기서열(n=165)을 획득하였다. 총 165개의 염기서열은 분류학상의 '문(phylum)'인 Ascomycota, Neocallimastigomycota 및 Basidiomycota로 분류되었고, 165개의 염기서열 중에서 각각 109개, 48개, 8개의 염기서열을 차지하였다. Ascomycota 염기서열은 식물병원성곰팡이나 마이코톡신을 생성하는 곰팡이를 포함하고 있는 '속(genus)' Pseudonectria, Magnaporthe, Alternaria, Cochliobolus, Cladosporium 및 Davidiella로 분류되었다. 또한, Basidiomycota 염기서열은 식물병원성곰팡이를 포함하고 있는 '속(genus)' Thanatephorus와 Cryptococcus로 분류되었다. 뿐만 아니라, Neocallimastigomycota 염기서열의 경우 섭취된 조사료의 주요 구조탄수화물을 분해하는 '속(genus)' Cyllamyces, Neocallimastix, Anaeromyces, Caecomyces, Orpinomyces, Piromyces로 분류되었다. 본 연구는 처음으로 28S rDNA 염기서열의 메타분석을 통해 반추위 곰팡이 다양성에 대한 정보를 통합적으로 제공하였다. 본 연구의 결과는 향후 반추위 곰팡이 연구에 대한 방향을 제공할 것이고, 새로운 분석도구 개발에 응용될 수 있을 것이다.

Keywords

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