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Geodermatophilus siccatus sp. nov., isolated from arid sand of the Saharan desert in Chad

  • A novel Gram-positive, aerobic, actinobacterial strain, CF6/1T, was isolated in 2007 during environmental screening of arid desert soil in the Sahara near to Ourba, Chad. The isolate was found to grow best in a temperature range of 20–37 °C and at pH 6.0–8.5 and showed no NaCl tolerance, forming black-coloured and nearly circular colonies on GYM agar. Chemotaxonomic and molecular characteristics determined for the isolate match those previously described for members of the genus Geodermatophilus. The DNA G + C content of the novel strain was determined to be 74.9 mol %. The peptidoglycan was found to contain meso-diaminopimelic acid as the diagnostic diamino acid. The main phospholipids were determined to be phosphatidylethanolamine, phosphatidylinositol, phosphatidylcholine, diphosphatidylglycerol and traces of phosphatidylglycerol; MK-9(H4) was identified as the dominant menaquinone and galactose as the diagnostic sugar. The major cellular fatty acids were found to be theA novel Gram-positive, aerobic, actinobacterial strain, CF6/1T, was isolated in 2007 during environmental screening of arid desert soil in the Sahara near to Ourba, Chad. The isolate was found to grow best in a temperature range of 20–37 °C and at pH 6.0–8.5 and showed no NaCl tolerance, forming black-coloured and nearly circular colonies on GYM agar. Chemotaxonomic and molecular characteristics determined for the isolate match those previously described for members of the genus Geodermatophilus. The DNA G + C content of the novel strain was determined to be 74.9 mol %. The peptidoglycan was found to contain meso-diaminopimelic acid as the diagnostic diamino acid. The main phospholipids were determined to be phosphatidylethanolamine, phosphatidylinositol, phosphatidylcholine, diphosphatidylglycerol and traces of phosphatidylglycerol; MK-9(H4) was identified as the dominant menaquinone and galactose as the diagnostic sugar. The major cellular fatty acids were found to be the branched-chain saturated acids iso-C16:0 and iso-C15:0, as well as C17:1ω8c. The 16S rRNA gene sequence shows 97.5–97.9 % sequence identity with the four validly named or at least effectively published members of the genus: Geodermatophilus obscurus (97.5 %), Geodermatophilus arenarius (97.7 %), Geodermatophilus ruber (97.9 %) and Geodermatophilus nigrescens (97.9 %). Based on the results from this polyphasic taxonomic analysis and DNA–DNA hybridizations with all type strains of the genus, we propose that strain CF6/1T represents a novel species, Geodermatophilus siccatus, with the type strain CF6/1T = DSM 45419T = CCUG 62765T = MTCC 11414T.zeige mehrzeige weniger

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Metadaten
Autoren/innen:M. Del Carmen Montero-Calasanz, M. Göker, M. Rohde, P. Schumann, G. Pötter, C. Spröer, Anna Gorbushina, H.-P. Klenk
Dokumenttyp:Zeitschriftenartikel
Veröffentlichungsform:Verlagsliteratur
Sprache:Englisch
Titel des übergeordneten Werkes (Englisch):Antonie van Leeuwenhoek
Jahr der Erstveröffentlichung:2013
Verlag:Springer
Verlagsort:Dordrecht
Jahrgang/Band:103
Ausgabe/Heft:3
Erste Seite:449
Letzte Seite:456
Freie Schlagwörter:Actinomycetes; Geodermatophilaceae; Phenotype microarray; Taxonomy; Xerophiles
DOI:https://doi.org/10.1007/s10482-012-9824-x
ISSN:0003-6072
ISSN:1572-9699
Verfügbarkeit des Dokuments:Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
Bibliotheksstandort:Sonderstandort: Publica-Schrank
Datum der Freischaltung:20.02.2016
Referierte Publikation:Ja
Datum der Eintragung als referierte Publikation:19.04.2013