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Interactions betwee...
Interactions between a soil fungus, Trichoderma harzianum, and IIb metals—adsorption to mycelium and production of complexing metabolites
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- Krantz-Rülcker, C. (författare)
- Department of Water and Environmental Studies, Linköping University, Linköping, Sweden
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- Allard, B. (författare)
- Department of Water and Environmental Studies, Linköping University, Linköping, Sweden
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- Schnürer, Johan, 1957- (författare)
- Department of Water and Environmental Studies, Linköping University, Linköping, Sweden; Department of Microbiology, Swedish University of Agricultural Sciences, Uppsala, Sweden
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(creator_code:org_t)
- Springer, 1993
- 1993
- Engelska.
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Ingår i: Biometals. - : Springer. - 0966-0844 .- 1572-8773. ; 6:4, s. 223-230
- Relaterad länk:
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https://urn.kb.se/re...
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visa fler...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Fungi are capable of accumulating metals and, in soil, such accumulation may influence metal speciation and transport. The interactions between a common soil fungus, Trichoderma harzianum, and IIb elements were studied in the present investigation. The accumulation of the metals zinc, cadmium and mercury by starved and non-starved mycelium at different pH was determined by a batch technique using radioactive tracers; uptake of the metals was found to be large, with respective distribution coefficients of about 10(3.5), 10(2.5) and 10(4.0) for zinc, cadmium and mercury, respectively. Metal accumulation by a starved system was largely independent of pH in the range 3-9, where in a non-starved system an increased accumulation of zinc (at 10(-8) m) was observed at low pH (3-5). Potentiometric titrations performed on the two systems revealed significant differences in acid capacities, i.e. values close to zero for the starved system and 500-800 meq kg-1 for the non-starved system. The maximum metal uptake was at least 50 mmol kg-1 at pH 6.5 (calculated from adsorption isotherms). The present findings suggests that in the non-starved system a metabolite is produced and then released when the pH is within a certain range.
Ämnesord
- NATURVETENSKAP -- Biologi -- Biokemi och molekylärbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Biochemistry and Molecular Biology (hsv//eng)
Nyckelord
- adsorption; complexes; IIb metals; Trichoderma harzianum
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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