2.50
Hdl Handle:
http://hdl.handle.net/10033/576924
Title:
Coupling of diversification and pH adaptation during the evolution of terrestrial Thaumarchaeota.
Authors:
Gubry-Rangin, Cécile; Kratsch, Christina; Williams, Tom A; McHardy, Alice C; Embley, T Martin; Prosser, James I; Macqueen, Daniel J
Abstract:
The Thaumarchaeota is an abundant and ubiquitous phylum of archaea that plays a major role in the global nitrogen cycle. Previous analyses of the ammonia monooxygenase gene amoA suggest that pH is an important driver of niche specialization in these organisms. Although the ecological distribution and ecophysiology of extant Thaumarchaeota have been studied extensively, the evolutionary rise of these prokaryotes to ecological dominance in many habitats remains poorly understood. To characterize processes leading to their diversification, we investigated coevolutionary relationships between amoA, a conserved marker gene for Thaumarchaeota, and soil characteristics, by using deep sequencing and comprehensive environmental data in Bayesian comparative phylogenetics. These analyses reveal a large and rapid increase in diversification rates during early thaumarchaeotal evolution; this finding was verified by independent analyses of 16S rRNA. Our findings suggest that the entire Thaumarchaeota diversification regime was strikingly coupled to pH adaptation but less clearly correlated with several other tested environmental factors. Interestingly, the early radiation event coincided with a period of pH adaptation that enabled the terrestrial Thaumarchaeota ancestor to initially move from neutral to more acidic and alkaline conditions. In contrast to classic evolutionary models, whereby niches become rapidly filled after adaptive radiation, global diversification rates have remained stably high in Thaumarchaeota during the past 400-700 million years, suggesting an ongoing high rate of niche formation or switching for these microbes. Our study highlights the enduring importance of environmental adaptation during thaumarchaeotal evolution and, to our knowledge, is the first to link evolutionary diversification to environmental adaptation in a prokaryotic phylum.
Affiliation:
Institute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdom
Citation:
Coupling of diversification and pH adaptation during the evolution of terrestrial Thaumarchaeota. 2015, 112 (30):9370-5 Proc. Natl. Acad. Sci. U.S.A.
Journal:
Proceedings of the National Academy of Sciences of the United States of America
Issue Date:
28-Jul-2015
URI:
http://hdl.handle.net/10033/576924
DOI:
10.1073/pnas.1419329112
PubMed ID:
26170282
Type:
Article
Language:
en
ISSN:
1091-6490
Appears in Collections:
publications of the research group bioinformatics in infection research ([BRICS] BIFO)

Full metadata record

DC FieldValue Language
dc.contributor.authorGubry-Rangin, Cécileen
dc.contributor.authorKratsch, Christinaen
dc.contributor.authorWilliams, Tom Aen
dc.contributor.authorMcHardy, Alice Cen
dc.contributor.authorEmbley, T Martinen
dc.contributor.authorProsser, James Ien
dc.contributor.authorMacqueen, Daniel Jen
dc.date.accessioned2015-09-08T11:59:44Zen
dc.date.available2015-09-08T11:59:44Zen
dc.date.issued2015-07-28en
dc.identifier.citationCoupling of diversification and pH adaptation during the evolution of terrestrial Thaumarchaeota. 2015, 112 (30):9370-5 Proc. Natl. Acad. Sci. U.S.A.en
dc.identifier.issn1091-6490en
dc.identifier.pmid26170282en
dc.identifier.doi10.1073/pnas.1419329112en
dc.identifier.urihttp://hdl.handle.net/10033/576924en
dc.description.abstractThe Thaumarchaeota is an abundant and ubiquitous phylum of archaea that plays a major role in the global nitrogen cycle. Previous analyses of the ammonia monooxygenase gene amoA suggest that pH is an important driver of niche specialization in these organisms. Although the ecological distribution and ecophysiology of extant Thaumarchaeota have been studied extensively, the evolutionary rise of these prokaryotes to ecological dominance in many habitats remains poorly understood. To characterize processes leading to their diversification, we investigated coevolutionary relationships between amoA, a conserved marker gene for Thaumarchaeota, and soil characteristics, by using deep sequencing and comprehensive environmental data in Bayesian comparative phylogenetics. These analyses reveal a large and rapid increase in diversification rates during early thaumarchaeotal evolution; this finding was verified by independent analyses of 16S rRNA. Our findings suggest that the entire Thaumarchaeota diversification regime was strikingly coupled to pH adaptation but less clearly correlated with several other tested environmental factors. Interestingly, the early radiation event coincided with a period of pH adaptation that enabled the terrestrial Thaumarchaeota ancestor to initially move from neutral to more acidic and alkaline conditions. In contrast to classic evolutionary models, whereby niches become rapidly filled after adaptive radiation, global diversification rates have remained stably high in Thaumarchaeota during the past 400-700 million years, suggesting an ongoing high rate of niche formation or switching for these microbes. Our study highlights the enduring importance of environmental adaptation during thaumarchaeotal evolution and, to our knowledge, is the first to link evolutionary diversification to environmental adaptation in a prokaryotic phylum.en
dc.language.isoenen
dc.titleCoupling of diversification and pH adaptation during the evolution of terrestrial Thaumarchaeota.en
dc.typeArticleen
dc.contributor.departmentInstitute of Biological and Environmental Sciences, University of Aberdeen, Aberdeen AB24 2TZ, United Kingdomen
dc.identifier.journalProceedings of the National Academy of Sciences of the United States of Americaen

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