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학술발표 섬, 무한한 가능성과의 만남

Lichen-associated bacterial communities are structured according to mycobiont type in polar regions

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조회 76회 작성일 21-12-15 16:03
발표자 노현주
년도 2021 년
구분(구두/포스터) 포스터
학술대회명 한국미생물학회 학술대회
초록 Lichens are symbiotic organisms that are majorly composed of fungi (mycobiont) and algae and/or cyanobacteria. In addition, lichen-associated bacteria (LAB) as an additional and integral component of lichen symbiosis has been proposed and interactions among diverse components have been considered to support a successful survival in extreme environmental conditions. To understand the potential functions of bacteria within the lichens in the subpolar and polar regions, we analyzed the composition and community assembly processes of LAB communities of 182 specimens of the 8 genera. Alphaproteobacteria followed by Acidobacteria and Betaproteobacteria dominated the LAB communities across all samples. The LAB composition was strongly influenced by lichen host followed by the geographical location, photobiont type, and growth type. One ASV with 96.4% 16S rRNA gene similarity with Acetobacter tropicalis subsisted in 83 specimens while some ASVs were found only in specific hosts. Stochastic processes largely shaped the assembly of LAB communities across all samples. Functional prediction analysis revealed that the functional patterns related to transporters, photosynthesis proteins, and prokaryotic defense systems were different according to the lichen genus. Our study shows that LAB communities of lichens in subpolar and polar regions are largely structured according to host-related factors and it may, in turn, contribute to the differentiated ecosystem functioning of lichens.

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