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The rhizosphere of aquatic plants is a habitat for cable bacteria.
FEMS Microbiol Ecol 2019; 95(6)FM

Abstract

Cable bacteria belonging to the family Desulfobulbaceae couple sulfide oxidation and oxygen reduction by long-distance electron transfer over centimeter distances in marine and freshwater sediments. In such habitats, aquatic plants can release oxygen into the rhizosphere. Hence, the rhizosphere constitutes an ideal habitat for cable bacteria, which have been reported on seagrass roots recently. Here, we employ experimental approaches to investigate activity, abundance, and spatial orientation of cable bacteria next to the roots of the freshwater plant Littorella uniflora. Fluorescence in situ hybridization (FISH), in combination with oxygen-sensitive planar optodes, demonstrated that cable bacteria densities are enriched at the oxic-anoxic transition zone next to roots compared to the bulk sediment in the same depth. Scanning electron microscopy showed cable bacteria along root hairs. Electric potential measurements showed a lateral electric field over centimeters from the roots, indicating cable bacteria activity. In addition, FISH revealed that cable bacteria were present in the rhizosphere of Oryza sativa (rice), Lobelia cardinalis and Salicornia europaea. Hence, the interaction of cable bacteria with aquatic plants of different growth forms and habitats indicates that the plant root-cable bacteria interaction might be a common property of aquatic plant rhizospheres.

Authors+Show Affiliations

Biofilm Centre, University of Duisburg-Essen, Universitätsstr. 5, 45141 Essen, Germany. Center for Electromicrobiology, Aarhus University, Ny Munkegade 116, DK-8000 Aarhus C, Denmark.Biofilm Centre, University of Duisburg-Essen, Universitätsstr. 5, 45141 Essen, Germany.Aarhus University Centre for Water Technology, Section for Microbiology, Department of Bioscience, Aarhus University, Ny Munkegade 116, DK-8000 Aarhus C, Denmark.Center for Electromicrobiology, Aarhus University, Ny Munkegade 116, DK-8000 Aarhus C, Denmark.Biofilm Centre, University of Duisburg-Essen, Universitätsstr. 5, 45141 Essen, Germany.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31054245

Citation

Scholz, Vincent V., et al. "The Rhizosphere of Aquatic Plants Is a Habitat for Cable Bacteria." FEMS Microbiology Ecology, vol. 95, no. 6, 2019.
Scholz VV, Müller H, Koren K, et al. The rhizosphere of aquatic plants is a habitat for cable bacteria. FEMS Microbiol Ecol. 2019;95(6).
Scholz, V. V., Müller, H., Koren, K., Nielsen, L. P., & Meckenstock, R. U. (2019). The rhizosphere of aquatic plants is a habitat for cable bacteria. FEMS Microbiology Ecology, 95(6), doi:10.1093/femsec/fiz062.
Scholz VV, et al. The Rhizosphere of Aquatic Plants Is a Habitat for Cable Bacteria. FEMS Microbiol Ecol. 2019 Jun 1;95(6) PubMed PMID: 31054245.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The rhizosphere of aquatic plants is a habitat for cable bacteria. AU - Scholz,Vincent V, AU - Müller,Hubert, AU - Koren,Klaus, AU - Nielsen,Lars Peter, AU - Meckenstock,Rainer U, PY - 2019/02/20/received PY - 2019/05/03/accepted PY - 2019/5/6/pubmed PY - 2019/5/6/medline PY - 2019/5/5/entrez KW - aquatic plants KW - cable bacteria KW - electric field KW - filamentous bacteria KW - oxygen distribution KW - rhizosphere JF - FEMS microbiology ecology JO - FEMS Microbiol. Ecol. VL - 95 IS - 6 N2 - Cable bacteria belonging to the family Desulfobulbaceae couple sulfide oxidation and oxygen reduction by long-distance electron transfer over centimeter distances in marine and freshwater sediments. In such habitats, aquatic plants can release oxygen into the rhizosphere. Hence, the rhizosphere constitutes an ideal habitat for cable bacteria, which have been reported on seagrass roots recently. Here, we employ experimental approaches to investigate activity, abundance, and spatial orientation of cable bacteria next to the roots of the freshwater plant Littorella uniflora. Fluorescence in situ hybridization (FISH), in combination with oxygen-sensitive planar optodes, demonstrated that cable bacteria densities are enriched at the oxic-anoxic transition zone next to roots compared to the bulk sediment in the same depth. Scanning electron microscopy showed cable bacteria along root hairs. Electric potential measurements showed a lateral electric field over centimeters from the roots, indicating cable bacteria activity. In addition, FISH revealed that cable bacteria were present in the rhizosphere of Oryza sativa (rice), Lobelia cardinalis and Salicornia europaea. Hence, the interaction of cable bacteria with aquatic plants of different growth forms and habitats indicates that the plant root-cable bacteria interaction might be a common property of aquatic plant rhizospheres. SN - 1574-6941 UR - https://www.unboundmedicine.com/medline/citation/31054245/The_rhizosphere_of_aquatic_plants_is_a_habitat_for_cable_bacteria L2 - https://academic.oup.com/femsec/article-lookup/doi/10.1093/femsec/fiz062 DB - PRIME DP - Unbound Medicine ER -