Formation of Nascent Chemoautotrophic Carbon Fixation Systems under Different Redox Conditions of Fluid Degassing of the Early Earth | Chapter 5 | Novel Perspectives of Geography, Environment and Earth Sciences Vol. 9

 In believes of the origin of history, the most reasonable is the idea of the primacy of autotrophic absorption, in which colorless odorless gas (CO2) is considered as the only source of element for the functioning of nascent metabolic pathways. The aim concerning this paper was to explain that the origin and development of basic autotrophic metabolism on early Earth were affected by the two various regimes of degassing of the Earth – reducing (predominance CH4) and oxidative (CO2). It understands from this that the ancestral element used in absorption may have been came from CH4 if the outflow of volcano matter fluid to the surface of the Earth consisted for the most part of methane. In aforementioned an environment, the primary autotrophic metabolic orders had to be methanotrophic. Due to the deficiency of molecular oxygen in the Archean environments, this metabolism would have been anaerobic, that is, oxidation of poison gas should have happened carried out by inorganic extreme-potential electron acceptors. In light of the supremacy and prevalence of CH4-contingent metabolism in hydrothermal systems of the old Earth, we propose a model of element fixation place the methane is fixed/transfered in a sequence of responses in an autocatalytic methane-fumarate phase. Nitrogen oxides are thermodynamically most favorable among likely oxidants of methane; still, even the activity of oxygen built by mineral buffers of iron in hydrothermal conditions is adequate for methanotrophic acetogenesis. The Hadean - Archaean hydrothermal system model is deliberate in the form of a phase drawing, which demonstrates the field of redox and P, T conditions benign for the formation and incident of primary methanotrophic metabolism.

Author(s) Details:

Sergey A. Marakushev,
Federal Research Center for Problems of Chemical Physics and Medical Chemistry, Russian Academy of Sciences, Academician Semenov Avenue 1, Chernogolovka, Moscow Region-142432, Russian Federation.

Ol`ga V. Belonogova,
Federal Research Center for Problems of Chemical Physics and Medical Chemistry, Russian Academy of Sciences, Academician Semenov Avenue 1, Chernogolovka, Moscow Region-142432, Russian Federation.

Please see the link here: https://stm.bookpi.org/NPGEES-V9/article/view/11626