Cell Adhesion of Shewanella Oneidensis to Iron Oxide Minerals: Effect of Different Single Crystal Faces

Journal Article · Thu Dec 01 23:00:00 EST 2005 · Geochemical Transactions, 6(4):77-84

DOI:https://doi.org/10.1063/1.2151110· OSTI ID:877007

Neal, Andrew L.; Bank, Tracy L.; Hochella, Michael F.; Rosso, Kevin M.

The results of experiments designed to test the hypothesis that near-surface molecular structure of iron oxide minerals influences adhesion of dissimilatory iron reducing bacteria are presented. These experiments involved the measurement, using atomic force microscopy, of interaction forces generated between Shewanella oneidensis MR-1 cells and single crystal growth faces of iron oxide minerals. Significantly different adhesive force was measured between cells and the (001) face of hematite, and the (100) and (111) faces of magnetite. A role for electrostatic interactions is apparent. The trend in relative forces of adhesion generated at the mineral surfaces is in agreement with predicted ferric site densities published previously. These results suggest that near-surface structure does indeed influence initial cell attachment to iron oxide surfaces; whether this is mediated via specific cell surface-mineral surface interactions or by more general interfacial phenomena remains untested.

• Research Organization: Pacific Northwest National Laboratory (PNNL), Richland, WA (US)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 877007
• Report Number(s): PNNL-SA-48144; KP1704020
• Journal Information: Geochemical Transactions, 6(4):77-84, Journal Name: Geochemical Transactions, 6(4):77-84 Journal Issue: 4 Vol. 6
• Country of Publication: United States
• Language: English