Ignisphaera aggregans gen. nov., sp. nov., a novel hyperthermophilic crenarchaeote isolated from hot springs in Rotorua and Tokaanu, New Zealand

International Journal of Systematic and Evolutionary Microbiology
Thomas D NiederbergerHugh W Morgan

Abstract

Consortia containing a novel coccus-shaped, anaerobic heterotroph together with Pyrobaculum rods were cultivated from geothermal environments in New Zealand. Pure cultures of the cocci were only obtained from one such consortium, despite extensive attempts. Cells of this strain (AQ1.S1T) were regular to irregular cocci in morphology and occasionally formed large aggregates, especially when utilizing polysaccharides such as konjac glucomannan as a carbon source. Strain AQ1.S1T is a hyperthermophile, with an optimal temperature for growth between 92 and 95 degrees C (range 85-98 degrees C), and a moderate acidophile, with optimal growth occurring at pH 6.4 (range 5.4-7.0). Growth was inhibited by the addition of sulphur and NaCl (optimal growth occurred without addition of NaCl) and an electron acceptor was not required. Strain AQ1.S1T utilized starch, trypticase peptone, lactose, glucose, konjac glucomannan, mannose, galactose, maltose, glycogen and beta-cyclodextrin as carbon sources. The G+C content was 52.9 mol%. Based on 16S rRNA gene sequence analysis and physiological features it is proposed that isolate AQ1.S1T (=DSM 17230T=JCM 13409T) represents the type strain of a novel species of a new genus within the Crenarchaeota, ...Continue Reading

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Citations

Apr 12, 2007·Extremophiles : Life Under Extreme Conditions·Adrian HetzerChristopher J Daughney
Feb 28, 2009·Extremophiles : Life Under Extreme Conditions·Kyle C CostaBrian P Hedlund
May 18, 2011·BMC Microbiology·Céline Lucchetti-MiganehFrédérique Barloy-Hubler
Feb 10, 2011·Standards in Genomic Sciences·Markus GökerHans-Peter Klenk
Jun 7, 2014·Extremophiles : Life Under Extreme Conditions·D'Arcy R Meyer-Dombard, Jan P Amend
Apr 2, 2008·Annals of the New York Academy of Sciences·Isaac D Wagner, Juergen Wiegel
Oct 27, 2011·Environmental Microbiology·Luís G GonçalvesHelena Santos
Nov 3, 2009·Environmental Microbiology·Hiroyuki KimuraKenji Kato
Jan 30, 2013·Biochemical Society Transactions·Sabrina Fröls
Jul 7, 2016·Proceedings of the National Academy of Sciences of the United States of America·Charles A LewisRichard Wolfenden
Jan 9, 2007·Microbiological Research·Thomas D NiederbergerHugh W Morgan
Jun 5, 2020·Acta Crystallographica. Section D, Structural Biology·P N BlankJ A Himmelberger
May 11, 2021·Frontiers in Microbiology·Nicholas J ReichartRoland Hatzenpichler
Jun 19, 2021·Archives of Microbiology·Bruna SilvaAna T Luís

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