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http://dx.doi.org/10.4490/algae.2020.35.3.4

Violetonostoc minutum gen. et sp. nov. (Nostocales, Cyanobacteria) from a rocky substrate in China  

Cai, Fangfang (Key Laboratory for Animal Nutrition and Feed Science of Hubei Province, Wuhan Polytechnic University)
Peng, Xin (Key Laboratory of Algal Biology, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences)
Li, Renhui (Key Laboratory of Algal Biology, State Key Laboratory of Freshwater Ecology and Biotechnology of China, Institute of Hydrobiology, Chinese Academy of Sciences)
Publication Information
ALGAE / v.35, no.1, 2020 , pp. 1-15 More about this Journal
Abstract
Two strains isolated from a subtropical region in China, were morphologically identified as a Nostoc-like species, but its taxonomic identity was unknown. In this study, these two strains were taxonomically and phylogenetically characterized based on polyphasic approach combining morphological and genetic characteristics. Though both were virtually indistinguishable from Nostoc in field and cultured material, these two strains were phylogenetically distinct from Nostoc based on 16S rRNA phylogeny. The 16S-23S internal transcribed spacer rRNA secondary structure of these strains showed the unique pattern of D1-D1', Box-B, and V3 helix, which distinguished them from other Nostoc-like heterocytous genera. A unique cluster separated from Nostoc sensu stricto supports the establishment of Violetonostoc gen. nov. with the type species as Violetonostoc minutum sp. nov.
Keywords
cyanobacteria; polyphasic methods; secondary structure of ITS; taxonomy; Violetonostoc gen. nov.; 16S rRNA phylogeny;
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