Journal of Species Research

The National Institute of Biological Resources (국립생물자원관)
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Characterizations of five heterotrophic nanoflagellates newly recorded in Korea

  • Jeong, Dong Hyuk (Department of Oceanography, Kyungpook National University) ;
  • Park, Jong Soo (Department of Oceanography, Kyungpook National University)
  • Received : 2021.06.09
  • Accepted : 2021.08.20
  • Published : 2021.11.30
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Abstract

Heterotrophic nanoflagellates (HNFs, 2-20 ㎛ in size) are substantially capable of controlling bacterial abundance in aquatic environments, and microbial taxonomists have studied ecologically important and abundant HNFs for a long time. However, the classifications of HNFs have rarely been reported in Korea on the basis of morphology and 18S rDNA sequencing. Here, previously reported five HNFs from non-Korean habitats were isolated from Korean coastal seawater or intertidal sediments for the first time. Light microscopic observations and 18S rDNA phylogenetic trees revealed that the five isolated species were Cafeteria burkhardae strain PH003, Cafeteria graefeae strain UL001, Aplanochytrium minuta (formerly Labyrinthuloides minuta) strain PH004, Neobodo curvifilus strain KM017 (formerly Procryptobia sorokini), and Ancyromonas micra (formerly Planomonas micra) strain IG005. Being morphologically and phylogenetically indistinct from its closest species, all isolates from Korea were therefore regarded as identical species detected in other countries. Thus, this result indicates an expansion of known habitats that range from those of the five isolates in natural ecosystems on Earth.

Keywords

Acknowledgement

We thank to Sang Yoon Woo, Hyeon Been Lee, and Je Bak An for assistance with sampling. This work was supported by the National Institute of Biological Resources of Korea (NIBR202002207 and NIBR202130203) and the National Research Foundation of Korea (NRF) grant, funded by the Korean government to JSP (NRF-2019R1A2C2002379).

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