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Updated: Mar 3, 2026

Laboratory Simulation of an IronII-rich Precambrian Marine Upwelling System to Explore the Growth of Photosynthetic Bacteria
Published on: July 24, 2016
Pressure-dependent adaptation strategies implied by the dissimilatory iron reducer Orenia metallireducens Z6
Shuyi Li1, Jiahao Pei2, Jiasong Fang2
1School of Environmental Studies China University of Geosciences (Wuhan) Wuhan China.
Abstract:
Tolerance of high hydrostatic pressure (HHP) is the hallmark of deep subsurface microorganisms, while its mechanisms remain under-investigated. This study explores HHP adaptation in the piezotolerant bacterium Orenia metallireducens across its near-full pressure range (0.1-40 MPa). At inhibitory pressure (40 MPa), the organism redirected carbon flux toward more favorable energy generation and biosynthesis using ferric mineral as the "electron sink." Furthermore, both universal and pressure-dependent strategies enabled the organism to withstand varying pressures. These findings highlight the role of iron minerals in microbial HHP adaptation and reveal novel survival strategies, advancing our understanding of deep-life evolution and biogeochemical impacts.
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