Bacterial communities in Antarctic lichens
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- Bacterial communities in Antarctic lichens
- Park, Chae Haeng
Kim, Kyung Mo
Hong, Soon Gyu
- Environmental Sciences & Ecology; Physical Geography; Geology
- Cladonia; Lichen associated bacteria; Umbilicaria; Usnea
- Issue Date
- Park, Chae Haeng, et al. 2015. "Bacterial communities in Antarctic lichens". Antarctic Science, 28(6): 455-461.
- To date, many studies surveying the bacterial communities in lichen thalli from diverse
geographical areas have shown that Alphaproteobacteria is the predominant bacterial class in most
lichens. In this study, bacterial communities in several Antarctic lichens with different growth form and
substrates were analysed. The bacterial community composition in fruticose and foliose lichens,
Cladonia, Umbilicaria and Usnea, and crustose lichens, Buelia granulosa, Amandinea coniops and
Ochrolechia parella, from King George Island was analysed by pyrosequencing of bacterial 16S rRNA
genes. Results showed that Proteobacteria, Acidobacteria, Actinobacteria and Bacteroidetes were
predominant phyla. The predominant bacterial class in most of the samples was Alphaproteobacteria.
Acetobacteriaceae of the order Rhodospiralles in Alphaproteobacteria was the most abundant bacterial
family in Antarctic lichens. The LAR1 lineage of the order Rhizobiales, a putative N-fixer which has
been frequently observed in lichens from temperate areas, was detected only from a few samples at low
frequency. It is expected that other bacterial taxa are working as N-fixers in Antarctic lichens. From the
PCoA analysis of the Fast UniFrac distance matrix, it was proposed that the microbial community
structures in Antarctic lichens were affected by host species, growth form and substrates.
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