Journal of Marine Bioscience and Biotechnology (한국해양바이오학회지)

The Korean Society for Marine Biotechnology (한국해양바이오학회)
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Distribution and diversity of rhizosphere bacteria of mixed halophytes vegetation native to the Goraebul sand dune, Korea : Approaches to coastal dune conservation

한반도 고래불 해안사구에 자생하는 혼합 염생식물군락 근권세균의 분포 및 다양성 고찰 : 해안사구 보전을 위한 접근

  • Jong Myong Park (Water Quality Research Institute, Waterworks Headquarters) ;
  • Ji Won Hong (Department of Hydrogen and Renewable Energy, Kyungpook National University) ;
  • Ki-Eun Lee (Species Diversity Research Division, National Institute of Biological Resources) ;
  • Jong-Guk Kim (School of Life Science, Kyungpook National University) ;
  • Young-Hyun You (Species Diversity Research Division, National Institute of Biological Resources)
  • 박종명 (인천상수도사업본부 맑은물연구소) ;
  • 홍지원 (경북대학교 수소 및 신재생에너지학과) ;
  • 이기은 (국립생물자원관 생물종다양성연구과) ;
  • 김종국 (경북대학교 생명과학부) ;
  • 유영현 (국립생물자원관 생물종다양성연구과)
  • Received : 2024.02.19
  • Accepted : 2024.03.08
  • Published : 2024.06.30
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Abstract

Coastal dunes must be conserved. Their native halophytes support coastal geography while their symbiotic microorganisms help vegetation thrive. The Goraebul coast has the largest, well-conserved dune system on the East Sea of the Korean Peninsula due to a climax mixed halophyte (C. soldanella, C. kobomugi, and E. mollis) vegetation support. This study identified rhizobacteria and their diversity in mixed halophyte communities unique to Goraebul. Five phyla, 12 genera, and 21 species were identified based on 16S rDNA sequences from 65 isolates. The phylum Bacillota, class Bacillota, order Bacillales, and family Bacillaceae were identified, with Bacillus as the dominant genus (46.15%). The richness and Shannon's diversity were higher at the species than at the genus level due to the dominance of Bacillus; however, various Bacillus species (7) were identified. Therefore, the climax mixed vegetation adapted to the Goraebul coast may exert natural selection pressure in favor of the common characteristics of Bacillus. However, despite this advantage, the Shannon equitability (0.86), Simpson (0.08), and Shannon diversity (2.79) indexes indicate a stable rhizosphere cluster and the climax mixed vegetation is affected by symbiotic relationships between healthy rhizosphere microbiota.

Keywords

Acknowledgement

This work was supported by a grant from the National Institute of Biological Resources (NIBR), funded by the ministry of Environment (MOE) of the Republic of Korea (NIBR202405101).

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