| Title: | "Decomposition of spruce wood and release of volatile organic compounds depend on decay type, fungal interactions and enzyme production patterns" |
| Author(s): | Mali T; Maki M; Hellen H; Heinonsalo J; Back J; Lundell T; |
| Address: | "Department of Microbiology, University of Helsinki, Viikki Campus, P.O.Box 56, FI-00014 Helsinki, Finland. Department of Forest Sciences, University of Helsinki, Viikki Campus, P.O.Box 27, FI-00014 Helsinki, Finland. Institute for Atmospheric and Earth System Research, University of Helsinki, FI-00014 Helsinki, Finland. Finnish Meteorological Institute, P.O.Box 503, FI-00101 Helsinki, Finland" |
| ISSN/ISBN: | 1574-6941 (Electronic) 0168-6496 (Print) 0168-6496 (Linking) |
| Abstract: | "Effect of three wood-decaying fungi on decomposition of spruce wood was studied in solid-state cultivation conditions for a period of three months. Two white rot species (Trichaptum abietinum and Phlebia radiata) were challenged by a brown rot species (Fomitopsis pinicola) in varying combinations. Wood decomposition patterns as determined by mass loss, carbon to nitrogen ratio, accumulation of dissolved sugars and release of volatile organic compounds (VOCs) were observed to depend on both fungal combinations and growth time. Similar dependence of fungal species combination, either white or brown rot dominated, was observed for secreted enzyme activities on spruce wood. Fenton chemistry suggesting reduction of Fe3+ to Fe2+ was detected in the presence of F. pinicola, even in co-cultures, together with substantial degradation of wood carbohydrates and accumulation of oxalic acid. Significant correlation was perceived with two enzyme activity patterns (oxidoreductases produced by white rot fungi; hydrolytic enzymes produced by the brown rot fungus) and wood degradation efficiency. Moreover, emission of four signature VOCs clearly grouped the fungal combinations. Our results indicate that fungal decay type, either brown or white rot, determines the loss of wood mass and decomposition of polysaccharides as well as the pattern of VOCs released upon fungal growth on spruce wood" |
| Keywords: | "Biodegradation, Environmental Carbon/metabolism Fungal Proteins/genetics/*metabolism Fungi/classification/enzymology/genetics/*metabolism Hydrolysis Lignin/metabolism Nitrogen/metabolism Oxalic Acid/analysis/metabolism Picea/chemistry/metabolism/*microbio;" |
| Notes: | "MedlineMali, Tuulia Maki, Mari Hellen, Heidi Heinonsalo, Jussi Back, Jaana Lundell, Taina eng Research Support, Non-U.S. Gov't England 2019/09/09 FEMS Microbiol Ecol. 2019 Sep 1; 95(9):fiz135. doi: 10.1093/femsec/fiz135" |
