.i.Aulosira bohemensis./i. sp. nov.: further phylogenetic uncertainty at the base of the Nostocales (Cyanobacteria)

0328058 - BC 2010 RIV US eng J - Journal Article
Lukešová, Alena - Johansen, J. R. - Martin, M.P. - Casamatta, D.A.
Aulosira bohemensis sp. nov.: further phylogenetic uncertainty at the base of the Nostocales (Cyanobacteria).
Phycologia. Roč. 48, č. 2 (2009), s. 118-129. ISSN 0031-8884. E-ISSN 2330-2968
Institutional research plan: CEZ:AV0Z60660521
Keywords : Cyanobacteria * 16S rRNA gene * 16S-23S Internal transcribed spacer (ITS)
Subject RIV: EH - Ecology, Behaviour
Impact factor: 1.218, year: 2009

Aulosira bohemensis sp. nov. was isolated from a wet meadow soil in South Bohemia, Czech Republic. It shares all the features of the majority of other Aulosira species, including isopolar development with intercalary heterocytes and apoheterocytic akinete development. It differs from all other species through the production of hormogonia perpendicular to the trichome axis following akinete germination. Morphologically the genus Aulosira appears closest to Nodularia, however,phylogenetic placement of A. bohemensis based on 16S rRNA was distant from that taxon. Aulosira falls within the Nostocaceae, with possible sister taxa in Trichormus, Mojavia, Nostoc. Despite the variety of phylogenetic analyses performed, we were unable to obtain bootstrap support for its position in any tree, and its correct phylogenetic position within the Nostocaceae remains unresolved.
Permanent Link: http://hdl.handle.net/11104/0174465