Biology
Scientific paper
Mar 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009asbio...9..193b&link_type=abstract
Astrobiology, Volume 9, Issue 2, pp. 193-219.
Biology
1
Archaea, Rise In Oxygen, Phylogenetics, Metabolism, Microbial Evolution, Phylogenomic Dating, Precambrian, Proterozoic
Scientific paper
Ancestral trait reconstruction was used to identify the relative ancestry of metabolic and physiological traits in the archaeal domain of life. First, well-resolved phylogenetic trees were inferred with multiple gene sequences obtained from whole genome sequences. Next, metabolic and physiological traits were coded into characters, and ancestral state reconstruction was used to identify ancient and derived traits. Traits inferred to be ancient included sulfur reduction, methanogenesis, and hydrogen oxidation. By using the articulation of the “oxygen age constraint,” several other traits were inferred to have arisen at or after 2.32 Ga: aerobic respiration, nitrate reduction, sulfate reduction, thiosulfate reduction, sulfur oxidation, and sulfide oxidation. Complex organic metabolism appeared to be nearly as ancient as autotrophy. Hyperthermophily was ancestral, while hyperacidophily and extreme halophily likely arose after 2.32 Ga. The ancestral euryarchaeote was inferred to have been a hyperthermophilic marine methanogen that lived in a deep-sea hydrothermal vent. In contrast, the ancestral crenarchaeote was most likely a hyperthermophilic sulfur reducer that lived in a slightly acidic terrestrial environment, perhaps a fumarole. Cross-colonization of these habitats may not have occurred until after 2.32 Ga, which suggests that both archaeal lineages exhibited niche specialization on early Earth for a protracted period of time.
No associations
LandOfFree
Phylogenomic Dating-The Relative Antiquity of Archaeal Metabolic and Physiological Traits does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Phylogenomic Dating-The Relative Antiquity of Archaeal Metabolic and Physiological Traits, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phylogenomic Dating-The Relative Antiquity of Archaeal Metabolic and Physiological Traits will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-971233