Morphological and genetic diversity of the thermophilic cyanobacterium,Mastigocladus laminosus (Stigonematales,Cyanobacteria) from Japan and Myanmar |
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Authors: | Khin Myat Soe Akiko Yokoyama Jun Yokoyama Yoshiaki Hara |
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Affiliation: | 1. Graduate School of Science and Engineering;2. Structural Biosciences, Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan;3. Department of Biology, Faculty of Science, Yamagata University, Yamagata |
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Abstract: | The morphology and phylogeny of 13 strains of a thermophilic cyanobacterium, Mastigocladus laminosus Cohn, isolated from hot springs in Japan and Myanmar were analyzed to determine taxonomy and biogeography. From the morphological observations of cell size, there were significant differences among strains. Phylogenetic analyses based on 16S rRNA gene sequences revealed two lineages: Lineages I and II. Lineage I consisted of strains collected in Japan and reference strains from a previous study (CCMEE 5329 and 5331, Hakone, Japan); Lineage II included all of the Myanmar strains and one Japanese strain, and was a novel lineage in phylogeographic studies on M. laminosus. Since strains in the Lineage II tended to have larger cells than those in the Lineage I, the morphological and phylogenetic lineages corresponded well with each other. |
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Keywords: | 16S rRNA Japan Mastigocladus laminosus morphology Myanmar phylogeny thermophilic cyanobacterium |
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