Biodegradation of a Biocide (Cu- N -Cyclohexyldiazenium Dioxide) Component of a Wood Preservative by a Defined Soil Bacterial Community-Reference-Cited by-同舟云学术

Biodegradation of a Biocide (Cu- N -Cyclohexyldiazenium Dioxide) Component of a Wood Preservative by a Defined Soil Bacterial Community

Published:2010-12-15 Issue:24 Volume:76 Page:8076-8083
ISSN:0099-2240
Container-title:Applied and Environmental Microbiology
language:en
Short-container-title:Appl Environ Microbiol

Author:

Jakobs-Schönwandt Désirée¹,Mathies Helena¹,Abraham Wolf-Rainer²,Pritzkow Wolfgang³,Stephan Ina¹,Noll Matthias¹⁴

Affiliation:

1. BAM, Federal Institute for Materials Research and Testing, IV.1, Biology in Materials Protection and Environmental Issues, Unter den Eichen 87, DE-12205 Berlin, Germany

2. Helmholtz Centre for Infection Research, Research Group Chemical Microbiology, Inhoffenstrasse 7, DE-38124 Braunschweig, Germany

3. BAM, Federal Institute for Materials Research and Testing, I.5, Bioanalytics, Unter den Eichen 87, DE-12205 Berlin, Germany

4. BfR, Federal Institute for Risk Assessment, Division 74, Hygiene and Microbiology, Thielallee 88-92, DE-14195 Berlin, Germany

Abstract

ABSTRACT The wood protection industry has refined their products from chrome-, copper-, and arsenate-based wood preservatives toward solely copper-based preservatives in combination with organic biocides. One of these is Cu-HDO, containing the chelation product of copper and N -cyclohexyldiazenium dioxide (HDO). In this study, the fate of isotope-labeled ( 13 C) and nonlabeled ( 12 C) Cu-HDO incorporated in wood sawdust mixed with soil was investigated. HDO concentration was monitored by high-pressure liquid chromatography. The total carbon and the δ 13 C content of respired CO 2 , as well as of the soil-wood-sawdust mixture, were determined with an elemental analyzer-isotopic ratio mass spectrometer. The concentration of HDO decreased significantly after 105 days of incubation, and after 24 days the 13 CO 2 concentration respired from soil increased steadily to a maximum after 64 days of incubation. Phospholipid fatty acid-stable isotope probing (PFA-SIP) analysis revealed that the dominant PFAs C 19:0 d8,9, C 18:0 , C 18:1 ω7, C 18:2 ω6,9, C 17:1 d7,8, C 16:0 , and C 16:1 ω7 were highly enriched in their δ 13 C content. Moreover, RNA-SIP identified members of the phylum Acidobacteria and the genera Phenylobacterium and Comamonas that were assimilating carbon from HDO exclusively. Cu-HDO as part of a wood preservative effectively decreased fungal wood decay and overall microbial respiration from soil. In turn, a defined bacterial community was stimulated that was able to metabolize HDO completely.

Publisher

American Society for Microbiology

Subject

Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology

Link

https://journals.asm.org/doi/pdf/10.1128/AEM.01092-10

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