Abstract
AME Aquatic Microbial Ecology Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsSpecials AME 15:311-314 (1998) - doi:10.3354/ame015311 Sulphate reduction associated with roots and rhizomes of the marine macrophyte Zostera marina Vibeke Blaabjerg, Kai Finster* Department of Microbial Ecology, Institute of Biological Sciences, Bldg 540, University of Aarhus, DK-8000 Aarhus C, Denmark *Addressee for correspondence. E-mail: kai.finster@biology.aau.dk ABSTRACT: The activity, the location and the oxygen sensitivity of sulphate reducers associated with sediment-free roots and rhizomes of the seagrass Zostera marina were investigated. Sulphate reduction rates were determined after treatment of roots and rhizomes with hypochlorite or exposure to air. Untreated roots and rhizomes served as controls. In general, root- as well as rhizome-associated sulphate reduction rates were high (20 to 50 μmol SO42- gdw-1 d-1). After surface sterilisation, the sulphate reduction rates decreased by about 90%, indicating that most of the sulphate reducers were associated with the surface of the roots and rhizomes. Pre-incubation of roots for 8 h in the presence of 0 to 20% oxygen (in steps of 2%) did not affect the sulphate reduction rates determined posterior under anoxic conditions. This demonstrates a high tolerance of root surface-associated sulphate reducers towards oxygen. KEY WORDS: Sulphate reducing bacteria · Roots · Rhizomes · Seagrass beds · Oxygen tolerance Full text in pdf format PreviousExport citation RSS - Facebook - Tweet - linkedIn Cited by Published in AME Vol. 15, No. 3. Publication date: August 31, 1998 Print ISSN: 0948-3055; Online ISSN: 1616-1564 Copyright © 1998 Inter-Research.
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