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

Details

Serval ID
serval:BIB_61BBB2B06489
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Description of Gloeomargarita lithophora gen. nov., sp. nov., a thylakoid-bearing, basal-branching cyanobacterium with intracellular carbonates, and proposal for Gloeomargaritales ord. nov.
Journal
International journal of systematic and evolutionary microbiology
Author(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
Publication state
Published
Issued date
03/2017
Peer-reviewed
Oui
Volume
67
Number
3
Pages
653-658
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
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.

Keywords
Gloeomargarita, cyanobacteria, phylogeny
Pubmed
Web of science
Open Access
Yes
Create date
12/12/2016 20:29
Last modification date
21/08/2019 5:12
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