Four newly recorded species of planktonic cyanobacteria (Oscillatoriales, Cyanobacteria) in Korea
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Four species of cyanobacteria that are unrecorded in Korea were isolated from freshwater and brackish water. These four species are Laspinema thermale of Laspinemaceae, Planktothricoides raciborskii and Planktothrix spiroides of Microcoleaceae, and Cephalothrix lacustris of Phormidiaceae, all belonging to the order Oscillatoriales. Laspinema thermale is morphologically characterized as apical cells that are longer than other cells. In this strain, the similarity of the 16S rRNA gene sequence with the previously reported L. thermale strains were 99.30-99.50%. Planktothricoides raciborskii, which is characterized by bluntly conical morphology of apical cells, showed 98.80-99.50% of similarity of the 16S rRNA gene sequence to the previously reported P. raciborskii strains. Planktothrix spiroides are characterized by floating due to gas vacuoles. In this strain, the similarity of the 16S rRNA gene sequence with the previously reported P. spiroides strains were 99.80-99.90%. Cephalothrix lacustris, characterized by having calyptra in apical cells, showed 99.80-99.90% similarity of the 16S rRNA gene sequence to previously reported C. lacustris strains. Also, these species were clustered in the same clade in phylogenetic analysis using 16S rRNA gene sequences with each corresponding species.
Abstract
Four species of cyanobacteria that are unrecorded in Korea were isolated from freshwater and brackish water. These four species are Laspinema thermale of Laspinemaceae, Planktothricoides raciborskii and Planktothrix spiroides of Microcoleaceae, and Cephalothrix lacustris of Phormidiaceae, all belonging to the order Oscillatoriales. Laspinema thermale is morphologically characterized as apical cells that are longer than other cells. In this strain, the similarity of the 16S rRNA gene sequence with the previously reported L. thermale strains were 99.30-99.50%. Planktothricoides raciborskii, which is characterized by bluntly conical morphology of apical cells, showed 98.80-99.50% of similarity of the 16S rRNA gene sequence to the previously reported P. raciborskii strains. Planktothrix spiroides are characterized by floating due to gas vacuoles. In this strain, the similarity of the 16S rRNA gene sequence with the previously reported P. spiroides strains were 99.80-99.90%. Cephalothrix lacustris, characterized by having calyptra in apical cells, showed 99.80-99.90% similarity of the 16S rRNA gene sequence to previously reported C. lacustris strains. Also, these species were clustered in the same clade in phylogenetic analysis using 16S rRNA gene sequences with each corresponding species.
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