Fungal Methane Production Under High Hydrostatic Pressure in Deep Subseafloor Sediments
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View abstract on PubMed
Summary
This summary is machine-generated.Deep-sea fungi enhance methane production under high hydrostatic pressure (HHP). This study reveals pressure-induced oxidative stress boosts fungal anaerobic methane synthesis, impacting global carbon cycles.
Area Of Science
- Microbiology
- Geochemistry
- Biogeochemistry
Background
- Fungi in deep subseafloor sediments can produce methane anaerobically.
- Methane production by these fungi under high hydrostatic pressure (HHP) is not well understood.
Purpose Of The Study
- To investigate the effect of HHP on anaerobic methane production by the deep-sea fungus *Schizophyllum commune*.
- To elucidate the molecular mechanisms underlying pressure-induced changes in methane production.
Main Methods
- Culturing *S. commune* under simulated in situ conditions (30 °C, 35 MPa HHP and 0.1 MPa atmospheric pressure) for 5 days.
- Analyzing bioactivity, biomass, and transcriptomics to assess methane production and gene expression.
- Measuring intracellular reactive oxygen species (ROS) levels and conducting comparative treatments.
Main Results
- *S. commune* survived and significantly increased methane production by ~2.5 times under HHP compared to atmospheric pressure.
- Genes involved in methane synthesis (mct1, dh3) were upregulated by 7.9- and 12.5-fold, respectively, under HHP.
- Increased methane production was linked to pressure-induced oxidative stress, evidenced by elevated ROS levels.
Conclusions
- High hydrostatic pressure enhances fungal anaerobic methane production.
- Oxidative stress plays a key role in mediating pressure effects on fungal methane synthesis.
- Fungi may contribute significantly to global methane flux in deep subseafloor environments.
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