Iron-reducing capacity of low-molecular-weight compounds produced in wood by fungi

Abstract

Birch and pine wood specimens were colonized by individual isolates of 12 brown-rot, 26 white-rot, six soft-rot and four blue (sap)-stain fungi. Homogenized wood was subsequently extracted in 75% ethyl acetate and centrifuged. The filtered extracts were analyzed for their iron-reducing capabilities using a ferrozine-based assay. Agar fungal cultures were also examined directly using a spot test for iron reduction. Extracts from wood colonized by brown-rot fungi showed significantly greater iron-reducing capability than extracts from wood colonized by white-rot or non-decay fungi. Results of the spot test ratings were highly variable, but in general the greatest color responses were associated with the brown-rot cultures. The ability of brown-rot fungi to produce compounds and/or modify the wood components that reduce iron is of relevance to the "chelator-mediated Fenton mechanism" that has been advanced as a theory for the nonenzymatic degradation of wood by brown-rot fungi

Published in

Holzforschung
2006, volume: 60, number: 6, pages: 630-636
Publisher: WALTER DE GRUYTER & CO

SLU Authors

• Daniel, Geoffrey

  • Department of Forest Products, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Forest Science

Publication identifier

• DOI: https://doi.org/10.1515/HF2006.106

Permanent link to this page (URI)

https://res.slu.se/id/publ/9973