Circumscription of Fulbrightiella gen. nov. and Sherwoodiella gen. nov., Two Novel Genera in the Calotrichaceae (Nostocales, Cyanobacteria)

© 2022 The Authors. Journal of Phycology published by Wiley Periodicals LLC on behalf of Phycological Society of America.

Bibliographische Detailangaben
Veröffentlicht in:Journal of phycology. - 1966. - 59(2023), 1 vom: 22. Feb., Seite 204-220
1. Verfasser: Kumar, Naresh (VerfasserIn)
Weitere Verfasser: Saraf, Aniket, Pal, Sagarika, Mishra, Deeksha, Singh, Prashant, Johansen, Jeffrey R
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2023
Zugriff auf das übergeordnete Werk:Journal of phycology
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Calothrix 16S-23S ITS Calotrichaceae Nostocales Rivulariaceae heteropolarity isopolarity RNA, Ribosomal, 16S DNA, Bacterial
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520 |a © 2022 The Authors. Journal of Phycology published by Wiley Periodicals LLC on behalf of Phycological Society of America. 
520 |a Three novel strains in Calotrichaceae from tropical habitats were isolated and characterized with regard to their morphology, phylogenetic placement, and secondary structures of conserved domains in the 16S-23S internal transcribed spacer (ITS). The strains fell into two clades formerly identified as Calothrix from freshwater and brackish habitats. Based on both morphology and ecology, they differed from the type species of Calothrix, C. confervicola, which is marine, has wide trichomes with short cells, and narrows abruptly to a hyaline hair. The first clade grouped species with heteropolar filaments widened at the base and narrowed gradually toward the apex but not ending in a hair, with basal heterocytes that are formed in series as the apically placed heterocytes senesce; this clade is being named Fulbrightiella gen. nov., with two named species, F. bharadwajae sp. nov. and F. oahuensis sp. nov. The second clade was comprised of a single species with isopolar trichomes that are untapering as hormogonia, but which widen midfilament and taper toward both ends following growth. These trichomes develop pairs of heterocyte mid-filament, causing fragmentation into heteropolar trichomes with basal heterocytes and ends that taper, but not to a hair. This clade consists of a single species at present, Sherwoodiella mauiensis. With this action, four clades in the Calotrichaceae have been named: Macrochaete, Dulcicalothrix, Fulbrightiella, and Sherwoodiella. Calothrix sensu stricto is truly marine, morphologically distinct, and unsequenced; finding and sequencing the generitype for Calothrix remains as the most important and unfinished task in the revision of the Calotrichaceae 
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700 1 |a Saraf, Aniket  |e verfasserin  |4 aut 
700 1 |a Pal, Sagarika  |e verfasserin  |4 aut 
700 1 |a Mishra, Deeksha  |e verfasserin  |4 aut 
700 1 |a Singh, Prashant  |e verfasserin  |4 aut 
700 1 |a Johansen, Jeffrey R  |e verfasserin  |4 aut 
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