Ammonia oxidation is not required for growth of Group 1.1c soil Thaumarchaeota

FEMS Microbiology Ecology
Eva B WeberCécile Gubry-Rangin

Abstract

Thaumarchaeota are among the most abundant organisms on Earth and are ubiquitous. Within this phylum, all cultivated representatives of Group 1.1a and Group 1.1b Thaumarchaeota are ammonia oxidizers, and play a key role in the nitrogen cycle. While Group 1.1c is phylogenetically closely related to the ammonia-oxidizing Thaumarchaeota and is abundant in acidic forest soils, nothing is known about its physiology or ecosystem function. The goal of this study was to perform in situ physiological characterization of Group 1.1c Thaumarchaeota by determining conditions that favour their growth in soil. Several acidic grassland, birch and pine tree forest soils were sampled and those with the highest Group 1.1c 16S rRNA gene abundance were incubated in microcosms to determine optimal growth temperature, ammonia oxidation and growth on several organic compounds. Growth of Group 1.1c Thaumarchaeota, assessed by qPCR of Group 1.1c 16S rRNA genes, occurred in soil, optimally at 30°C, but was not associated with ammonia oxidation and the functional gene amoA could not be detected. Growth was also stimulated by addition of organic nitrogen compounds (glutamate and casamino acids) but not when supplemented with organic carbon alone. This is t...Continue Reading

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Citations

Dec 13, 2016·FEMS Microbiology Ecology·Xinda LuJosh D Neufeld
Sep 14, 2018·Annual Review of Marine Science·Alyson E SantoroChristopher L Dupont
Jul 4, 2015·The ISME Journal·Eduard Vico OtonCécile Gubry-Rangin
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Feb 25, 2021·The Journal of Microbiology·Jong-Geol KimSung-Keun Rhee
Apr 11, 2021·Applied and Environmental Microbiology·Xiao-Yi XingBao-Li Zhu
May 17, 2021·Molecular Biology and Evolution·Yiyan YangZhiwei Cao

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Methods Mentioned

BETA
PCR

Software Mentioned

SigmaPlot
ClustalW
Geneious
BioEdit

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