DOI: 10.1101/454868Oct 29, 2018Paper

Wood modification by furfuryl alcohol caused delayed decomposition response in Rhodonia (Postia) placenta

BioRxiv : the Preprint Server for Biology
Inger SkredeGry Alfredsen

Abstract

The aim of this study was to investigate differential expression profiles of the brown rot fungus Rhodonia placenta (previously Postia placenta ) harvested at several time points when grown on Pinus radiata (radiata pine) and P. radiata with three different levels of modification by furfuryl alcohol, an environmentally benign commercial wood protection system. For the first time the entire gene expression pattern of a decay fungus is followed in untreated and modified wood from initial to advanced stages of decay. Results support the current model of a two-step decay mechanism, with an initial oxidative depolymerization followed by hydrolysis of cell-wall polysaccharides. The wood decay process is finished, and the fungus goes into starvation mode after five weeks when grown on unmodified P. radiata wood. The pattern of repression of oxidative processes and oxalate synthesis found in P. radiata at later stages of decay is not mirrored for the high furfurylation treatment. The high treatment level provided a more unpredictable expression pattern throughout the entire incubation period. Furfurylation does not seem to directly influence the expression of core plant cell wall hydrolyzing enzymes, as a delayed and prolonged, but sim...Continue Reading

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