Pressure‐dependent adaptation strategies implied by the dissimilatory iron reducer Orenia metallireducens Z6

2026/02/01 by Shuyi Li, Jiahao Pei, Jiasong Fang +17 · 1 voice
Environmental Science · Biochemistry, Genetics and Molecular Biology · #Microbial Fuel Cells and Bioremediation #Microbial Inactivation Methods #Bacterial biofilms and quorum sensing

paper · pdf · doi:10.1002/mlf2.70070

openalex publication_date 2026/02/01 · openalex created_date 2026/02/19 · openalex updated_date 2026/07/23

Abstract

Impact statement 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.

Discussions

• New in #mLife! How do deep-subsurface microbes cope with extreme pressure? In the iron-reducing bacterium Orenia metallireducens, pressure-dependent physiological and metabolic adaptations sustain ir [bsky, 2 points, 0 comments]

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