바이칼 호 Sponge에 서식하는 세균 군집 구조의 분석

Community Analysis of the Bacteria in Sponges of Lake Baikal by FISH Method

  • Seo, Eun-Young (Dept. of Environmental Science, Kangwon National University) ;
  • Kim, Mi-Ree (Dept. of Environmental Science, Kangwon National University) ;
  • Ahn, Tae-Seok (Dept. of Environmental Science, Kangwon National University)
  • 발행 : 2007.03.31

초록

바이칼호에 서식하는 있는2속(genus Baikalospongia와 Lubomirskia)(5.13)의 해면 내에 서식하고 있는 세균군집 구조를 조사하기 위하여 fluorescent in situ hybridization (FISH) 방법을 적용하였다. Baikalospongia와 Lubomirskia 속에 속하는 해면에 서식하는 총세균수는 각각 $7.2{\times}10^{7}-4.2{\times}10^{8}\;cells/ml$$1.2{\times}10^{8}-1.6{\times}10^{8}\;cells/ml$였다. 인근 호숫물의 총세균수는 $2.3{\times}7.7{\times}10^{5}\;cells/ml$ 범위로 해면에 서식하는 총세균수가 약 $10^{3}-10^{4}$배 더 높았다. 총세균수에 대한 세균군집 구조의 비율은 ${\alpha}-,\;{\beta}-,\;{\gamma}-Proteobacteria\;group$과 Cytophaga-Flavobacterium group외 다른 세균군이 genus Baikalospongia는 42.0-60.3%, Lubomirskia에서는 40.7-51.9%로, 호수물에서는 22.6-46.3%와 같이 나타났다. 이는 일반 담수에서 특정 군집이 우점하는 경향과는 다른 것으로써, 바이칼의 호숫물과 해면에 있는 세균들은 독특한 군집구조를 이루고 있음을 확인하였다.

The bacterial community structures at 2 sponge species belonging to the genus Baikalospongia and Lubomirskia in Lake Baikal were analyzed with fluorescent in situ hybridization (FISH) method. The total bacterial numbers in the genus Baikalospongia ranged from $7.2{\times}10^{7}\;to\;4.2{\times}10^{8}\;cells/ml$, and those in Lubomirskia from $1.2{\times}10^{8}\;to\;1.6{\times}10^{8}\;cells/ml$, while those of lake water were from $2.3{\times}7.7{\times}10^{5}\;cells/ml$. Total bacterial numbers in the sponges were $10^{3}-10^{4}$ times higher than those of lake water. In the genera Baikalospongia and Lubomirskia, the proportions of other unidentified bacterial groups to the Bacteria were 42.0-60.3% and 40.7-51.9%, respectively. These proportions were similar to those in lake water (22.6-46.3%). These results suggest that bacterial compositions in Lake Baikal water and sponges are highly unique.

키워드

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