Description of Gloeomargarita lithophora gen. nov., sp. nov., a thylakoid-bearing, basal-branching cyanobacterium with intracellular carbonates, and proposal for Gloeomargaritales ord. nov.

Détails

ID Serval
serval:BIB_61BBB2B06489
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
Description of Gloeomargarita lithophora gen. nov., sp. nov., a thylakoid-bearing, basal-branching cyanobacterium with intracellular carbonates, and proposal for Gloeomargaritales ord. nov.
Périodique
International journal of systematic and evolutionary microbiology
Auteur⸱e⸱s
Moreira D., Tavera R., Benzerara K., Skouri-Panet F., Couradeau E., Gérard E., Fonta C.L., Novelo E., Zivanovic Y., López-García P.
ISSN
1466-5034 (Electronic)
ISSN-L
1466-5026
Statut éditorial
Publié
Date de publication
03/2017
Peer-reviewed
Oui
Volume
67
Numéro
3
Pages
653-658
Langue
anglais
Notes
Publication types: Journal Article
Publication Status: ppublish
Résumé
A unicellular cyanobacterium, strain Alchichica-D10, was isolated from microbialites of the alkaline Lake Alchichica, Mexico. The cells were short rods (3.9±0.6 µm in length and 1.1±0.1 µm in width) forming biofilms of intense emerald green colour. They exhibited red autofluorescence under UV light excitation. UV-visible absorption spectra revealed that they contain chlorophyll a and phycocyanin, and electron microscopy showed the presence of thylakoids. The strain grew within a temperature range of 15-30 °C. Genomic DNA G+C content was 52.2 mol%. The most remarkable feature of this species was its granular cytoplasm, due to the presence of numerous intracellular spherical granules (16-26 per cell) with an average diameter of 270 nm. These granules, easily visible under scanning electron microscopy, were composed of amorphous carbonate containing Ca, Mg, Ba and Sr. A multi-gene phylogeny based on the analysis of 59 conserved protein markers supported robustly that this strain occupies a deep position in the cyanobacterial tree. Based on its phenotypic characters and phylogenetic position, strain Alchichica-D10 is considered to represent a new genus and novel species of cyanobacteria for which the name Gloeomargarita lithophora gen. nov., sp. nov. is proposed. The type strain is Alchichica-D10 (Culture Collection of Algae and Protozoa CCAP strain 1437/1; Collections de Cyanobactéries et Microalgues Vivantes of the Museum National d'Histoire Naturelle in Paris strain PMC 919.15). Furthermore, a new family, Gloeomargaritaceae, and a new order, Gloeoemargaritales, are proposed to accommodate this species under the International Code of Nomenclature for algae, fungi and plants.

Mots-clé
Gloeomargarita, cyanobacteria, phylogeny
Pubmed
Web of science
Open Access
Oui
Création de la notice
12/12/2016 21:29
Dernière modification de la notice
21/08/2019 6:12
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