High phosphate availability as a possible cause for massive cyanobacterial production of oxygen in the Paleoproterozoic atmosphere

Papineau, Dominic; Purohit, Ritesh; Fogel, Marilyn L.; Shields, Graham A.

doi:10.1016/j.epsl.2012.11.050

Cited by 53 publications

(38 citation statements)

References 82 publications

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“…This P increase was probably related to increased terrestrial weathering (Bekker et al, 2003;Papineau, 2010;Bekker and Holland, 2012;Planavsky et al, 2012;Partin et al, 2013;Reinhard et al, 2013). The natural abundance 15 N: 14 N ratio has been used as proxy for the N cycle, although the numerous possible reactions with their kinetic and equilibrium fractionations (Handley and Raven, 1992) make the interpretation for the latest Archaean (Busigny et al, 2013) and the Lomagundi-Jatuli (Papineau et al, 2013) uncertain; consequently, also the interpretations in terms of (e.g.) diazotrophy and denitrification are subject to reservations.…”

Section: Changes In the Availability Of S And N Over Timementioning

confidence: 96%

Nitrogen and sulfur assimilation in plants and algae

2014

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Section: Changes In the Availability Of S And N Over Timementioning

confidence: 96%

Nitrogen and sulfur assimilation in plants and algae

2014

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“…Furthermore, not even one of these zircons has been documented to have a detrital morphology and/or a core of 1.772 Ga, which is important to document in the light of possible late metamorphic zircon overgrowth during the Aravalli Orogen. Distinctive C and N isotope compositions of organic matter vary between basins, which have locally unique geochemical and mineralogical compositions (Papineau et al ., , ; Purohit et al ., , ). While rocks associated with phosphate are contemporary with the rocks with 13 C‐enriched carbonates, they are most likely younger than the Lomagundi–Jatuli Event (LJE) that ended at 2.06 Ga (Papineau et al ., ).…”

Section: Samples and Geologymentioning

confidence: 99%

Nanoscale petrographic and geochemical insights on the origin of the Palaeoproterozoic stromatolitic phosphorites from Aravalli Supergroup, India

et al. 2015

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Stromatolites composed of apatite occur in post-Lomagundi-Jatuli successions (late Palaeoproterozoic) and suggest the emergence of novel types of biomineralization at that time. The microscopic and nanoscopic petrology of organic matter in stromatolitic phosphorites might provide insights into the suite of diagenetic processes that formed these types of stromatolites. Correlated geochemical micro-analyses of the organic matter could also yield molecular, elemental and isotopic compositions and thus insights into the role of specific micro-organisms among these communities. Here, we report on the occurrence of nanoscopic disseminated organic matter in the Palaeoproterozoic stromatolitic phosphorite from the Aravalli Supergroup of north-west India. Organic petrography by micro-Raman and Transmission Electron Microscopy demonstrates syngeneity of the organic matter. Total organic carbon contents of these stromatolitic phosphorite columns are between 0.05 and 3.0 wt% and have a large range of δ(13) Corg values with an average of -18.5‰ (1σ = 4.5‰). δ(15) N values of decarbonated rock powders are between -1.2 and +2.7‰. These isotopic compositions point to the important role of biological N2 -fixation and CO2 -fixation by the pentose phosphate pathway consistent with a population of cyanobacteria. Microscopic spheroidal grains of apatite (MSGA) occur in association with calcite microspar in microbial mats from stromatolite columns and with chert in the core of diagenetic apatite rosettes. Organic matter extracted from the stromatolitic phosphorites contains a range of molecular functional group (e.g. carboxylic acid, alcohol, and aliphatic hydrocarbons) as well as nitrile and nitro groups as determined from C- and N-XANES spectra. The presence of organic nitrogen was independently confirmed by a CN(-) peak detected by ToF-SIMS. Nanoscale petrography and geochemistry allow for a refinement of the formation model for the accretion and phototrophic growth of stromatolites. The original microbial biomass is inferred to have been dominated by cyanobacteria, which might be an important contributor of organic matter in shallow-marine phosphorites.

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“…Importantly, these modifications are central to resetting methyl marks in both proteins and nucleic acids (Klose et al 2006;Iyer et al 2010;Pastor et al 2013); hence, their emergence might have allowed methyl modifications to be used dynamically, making them a major component of the epigenetic code in nuclear, cytoplasmic, and extracellular contexts. The GOE was also responsible for the genesis of more than half the known minerals on Earth (Hazen 2010), including phosphates that probably formed in shallow seas owing to oxidation by molecular oxygen (Papineau et al 2012). Given the importance of phosphates in biomineralized matrices, it is likely that the GOE also facilitated the use of secreted kinases as a mechanism for generation of such.…”

Section: Biogeochemical Considerationsmentioning

confidence: 99%

Protein and DNA Modifications: Evolutionary Imprints of Bacterial Biochemical Diversification and Geochemistry on the Provenance of Eukaryotic Epigenetics

Aravind

Burroughs

Zhang

et al. 2014

Cold Spring Harbor Perspectives in Biology

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Epigenetic information, which plays a major role in eukaryotic biology, is transmitted by covalent modifications of nuclear proteins (e.g., histones) and DNA, along with poorly understood processes involving cytoplasmic/secreted proteins and RNAs. The origin of eukaryotes was accompanied by emergence of a highly developed biochemical apparatus for encoding, resetting, and reading covalent epigenetic marks in proteins such as histones and tubulins. The provenance of this apparatus remained unclear until recently. Developments in comparative genomics show that key components of eukaryotic epigenetics emerged as part of the extensive biochemical innovation of secondary metabolism and intergenomic/interorganismal conflict systems in prokaryotes, particularly bacteria. These supplied not only enzymatic components for encoding and removing epigenetic modifications, but also readers of some of these marks. Diversification of these prokaryotic systems and subsequently eukaryotic epigenetics appear to have been considerably influenced by the great oxygenation event in the Earth's history.

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High phosphate availability as a possible cause for massive cyanobacterial production of oxygen in the Paleoproterozoic atmosphere

Cited by 53 publications

References 82 publications

Nitrogen and sulfur assimilation in plants and algae

Nitrogen and sulfur assimilation in plants and algae

Nanoscale petrographic and geochemical insights on the origin of the Palaeoproterozoic stromatolitic phosphorites from Aravalli Supergroup, India

Protein and DNA Modifications: Evolutionary Imprints of Bacterial Biochemical Diversification and Geochemistry on the Provenance of Eukaryotic Epigenetics

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