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Article

Analysis of the Morphological and Phylogenetic of Tetramphora Sulcata in Korea Tidal Flat

국내 저서 환경에서 출현한 Tetramphora sulcata의 형태 및 계통 발생학적 특성 분석

JEONGYUNG JIN1
,
BYOUNGSEOK KIM1
,
SOYEON KIM1
,
BYEOL KIM1
,
CHUNG HYEON CHOI2
,
SUK MIN YUN3
,
JONG-GYU PARK4*
진 정융1
,
김 병석1
,
김 소연1
,
김 별1
,
최 충현2
,
윤 석민3
,
박 종규4*
1Graduate Student, Department of Oceanography, Kunsan National University, Gunsan 54150, Korea
2Director, Ocean Environment Research, Jeollabuk-do, Gunsan 54133, Korea
3Associate Researcher, Microbial Research Department, Nakdonggang National Institute of Biological Resources, Gyeongsangbuk-do, Sangju 37242, Korea
4Professor, Department of Marine Biology, Kunsan National University, Gunsan 54150, Korea
1군산대학교 해양학과 대학원생
2해양환경리서치 이사
3국립낙동강생물자원관 미생물연구실 전임 연구원
4군산대학교 해양생물자원학과 교수
*Corresponding Author
31 May 2025. pp. 93-100
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Abstract

To study diatoms within the coastal benthic environment of Korea, surface sediments were collected in Pohang in May 2021, resulting in the discovery of a species of Tetramphora that had not been previously documented in Korea. The morphological characteristics were observed using both scanning electron microscopy (SEM) and optical microscopy, while its phylogenetic position was confirmed through the gene analysis of rbcL gene. The species under study exhibits the typical characteristics of Tetramphora, including less biarcuate raphe and siliceous clusters in the central region of the valve. The diatom measures is 35–39 μm in length and 8–9 μm in width, displaying 19 striae per 10 μm on the dorsal valve and 20 striae per 10 μm on the ventral valve. SEM observations revealed that a fascia is present in the center of the ventral valve, with a protrusion at the inner distal end of the raphe. The morphological characteristics of the species studied correspond with those of T. sulcata, and genetic analysis further supports its phylogenetic relationship with this species. This study represents the first report of T. sulcata in the coastal waters of Korea.

Keywords
Diatoms
New recorded species
rbcL Gene
Tetramphora sulcata

한국 연안 저서환경의 규조류 연구를 위해 2021년 5월 포항에서 표층 퇴적물을 채집하여 국내 미기록 Tetramphora 1종을 발굴하였다. 주사전자현미경(SEM)과 광학현미경으로 형태를 관찰하였고, rbcL 유전자 분석을 통해 분자계통분류학적 위치를 확인하였다. 연구 종은 중앙부에서 양 정축 끝으로 발달하는 완만한 호형의 raphe와 중앙부에 규산질이 뭉쳐져 있는 전형적인 Tetramphora의 특징을 하고 있으며, 길이 35-39 μm, 폭 8-9 μm, 10 μm 당 stria 개수는 등과 배에서 각각 19개, 20개이다. SEM에서 관찰한 세부 형태로 배 쪽 세포 중앙부에 fascia가 존재하고 내부 distal raphe end에 돌출부를 가진다. 연구 종은 보고된 T. sulcata와 형태 특징이 같고, 유전자 분석을 통한 계통분류학적 위치가 일치하였다. 본 연구를 통해 T. sulcata가 국내 해역에 분포하고 있음을 최초로 보고한다.

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Information
  • Publisher :The Korean Society of Oceanography
  • Publisher(Ko) :한국해양학회
  • Journal Title :The Sea Journal of the Korean Society of Oceanography
  • Journal Title(Ko) :한국해양학회지 바다
  • Volume : 30
  • No :2
  • Pages :93-100
  • Received Date : 2024-12-03
  • Revised Date : 2025-04-12
  • Accepted Date : 2025-04-22
  • DOI :https://doi.org/10.7850/jkso.2025.30.2.093
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