Introducing Petrachlorosaceae fam. nov., Petrachloros gen. nov. and Petrachloros mirabilis sp. nov. (Synechococcales, Cyanobacteria) isolated from a Portuguese UNESCO monument
[en] The order Synechococcales is a large cyanobacterial taxonomic group comprising both unicellular and filamentous forms, with parietal thylakoid arrangement. In the past years, this order has been the subject of taxonomic revisions with new families being erected. During studies of the phototrophic communities on the limestone walls of the Old Cathedral of Coimbra (UNESCO monument), a coccoid Aphanocapsa-like cyanobacterium was isolated. It was characterized using a polyphasic approach, based on morphology, 16S rRNA phylogeny, phylogenomic analyses, ITS secondary structure and ecology. The 16S rRNA phylogenetic analyses showed that this strain is located in a separate and fully supported family-level clade, at the bottom of a large group comprising the families Prochlorococcaceae and Prochlorotrichaceae, with Lagosinema as the closest (although quite distant) taxon. Additionally, the phylogenomic analysis also placed this strain in a separate lineage, situated distantly apart from the family Thermosynechococcaceae, but with strains assigned to Acaryochloris marina MBIC 11017 and Aphanocapsa montana BDHKU210001 as the closest taxa. Based on these data, as well as on the results from the secondary ITS structure, morphology and ecology, we here propose the establishment of a new family, Petrachlorosaceae fam. nov., along with the description of a new genus, Petrachloros gen. nov. and a new species Petrachloros mirabilis sp. nov. In this work, we also address additional considerations regarding some taxonomic groups within the order Synechococcales, which we believe deserve further revisions.
Research Center/Unit :
Inbios-Centre for Protein Engineering
Disciplines :
Microbiology
Author, co-author :
Soares, Fabiana
Trovão, João
Ahn, Anne-Catherine
Wilmotte, Annick ; Université de Liège - ULiège > Département des sciences de la vie > Physiologie et génétique bactériennes
Cardoso, Susana
Tiago, Igor
Portugal, Antonio
Language :
English
Title :
Introducing Petrachlorosaceae fam. nov., Petrachloros gen. nov. and Petrachloros mirabilis sp. nov. (Synechococcales, Cyanobacteria) isolated from a Portuguese UNESCO monument
Publication date :
08 February 2022
Journal title :
Journal of Phycology
ISSN :
0022-3646
eISSN :
1529-8817
Publisher :
Blackwell, Oxford, United Kingdom
Volume :
58
Pages :
219–233
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
15. Life on land
Name of the research project :
BCCM/ULC culture collection of cyanobacteria
Funders :
BELSPO - Politique scientifique fédérale F.R.S.-FNRS - Fonds de la Recherche Scientifique
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