새만금 염생식물로부터 염 저항성 근권미생물의 분리 및 특성 연구 = Isolation and characterization of halo-tolerant bacteria from the rhizosphere of halophytic plants distributed in Saemangeum

다국어 초록 (Multilingual Abstract)

The purpose of this study was to discover halotelerant bacteria from the rhizosphere of halophytes distributed in Saemangeum reclamation site in Jeollabuk-do. The halophytes used in this study include Spergularia marina, Calystegia soldanella, Suaeda maritima, Phragmites australis, Lathyrus japonicas, Rumex crispus, Zoysia sinica, Rosa rugosa, and Ixeris repens. The varous bacterial strains with salt resistance were isolated from their roots. Nine of them showed salt resistance up to 4M NaCl. They were further classified into the 29 individual strains based on colony morphology, pigments and an extend of salt resistance. A total of 19 bacterial species were identified through ribo-typing based on 16S rRNA. Among them, some strains were identified as species of Priestia aryabhattai, Bacillus xiamenensis, Rossellomorea arthrocnemi, Exiguobacterium acetylum, Gluticoptera, and Khylophaea. among others. According to literature, these bacteria might confer the plant growth promotion activity or salt resistance to plants. Therefore, it is anticipated that the bacteria isolated in this study will be useful not only as microorganisms to promote plant growth but also as important biological tools for cultivating non-halophytic plants in saline soils such as Saemangeum.