Preliminary Analysis of Diatom-infecting Viruses in Ariake Sound, Japan

• TOMARU Yuji

  National Research Institute of Fisheries and Environment of Inland Sea, Japan Fisheries Research and Education Agency

• MATSUBARA Tadashi

  Saga Prefectural Ariake Fisheries Research and Development Center

• MINE Takayuki

  Saga Prefectural Ariake Fisheries Research and Development Center

• SHIKATA Tomoyuki

  National Research Institute of Fisheries and Environment of Inland Sea, Japan Fisheries Research and Education Agency

• NAGASAKI Keizo

  Faculty of Agriculture and Marine Science, Kochi University

• KIMURA Kei

  Institute of Lowland and Marine Research, Saga University

• YAMAGUCHI Haruo

  Faculty of Agriculture and Marine Science, Kochi University

Abstract

Certain marine diatoms can be harmful to seaweed cultivation farms, resulting in loss of yield and quality. Diatoms are exposed to viral attack; to date, more than 20 diatom-infecting viruses have been isolated and characterized to different extents. Nevertheless, no data have been reported on viruses infecting the harmful bloom-forming diatom Asteroplanus karianus, which causes bleaching of cultured Pyropia. In this study, we successfully isolated a novel virus that infects A. karianus from the sediment of the Ariake Sound, which is famous for its nori cultivation. The virion was 21 nm in diameter and exhibited apparent host cell lysis over 10 days post inoculation. Moreover, using degenerate PCR targeting the RNA-dependent RNA polymerase (RdRp) domain, ssRNA virus sequences were detected from a natural diatom bloom population, which included A. karianus, collected in the Ariake Sound. The phylogenetic analysis showed that the detected sequence was monophyletic with diatom-infecting ssRNA virus members at a bootstrap value of 85%. These results indicated that viruses infecting A. karianus are present in the Ariake Sound and may play a role in decreasing the diatom populations in natural environments.

Journal

• Japan Agricultural Research Quarterly: JARQ

  Japan Agricultural Research Quarterly: JARQ 53 (3), 223-228, 2019-07-01

  Japan International Research Center for Agricultural Sciences

Keywords

• algal culture
• <i>Asteroplanus karianus</i>
• RdRp domain
• virus isolation

Details

• CRID: 1390001277348574080
• NII Article ID: 130007706259
• DOI: 10.6090/jarq.53.223
• ISSN: 21858896
• ISSN: 00213551
• Web Site: https://www.jstage.jst.go.jp/article/jarq/53/3/53_223/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed