Behavior of the Brown-rot Fungus Gloeophyllum trabeum on Thermally-modified Eucalyptus grandis Wood

Abstract

In this study, we aimed evaluate the behavior of the brown-rot fungus Gloeophylum trabeum and white-rot fungus Pycnoporus sanguineus on thermally-modified Eucalyptus grandis wood. To this end, boards from five-year-eleven-month-old E. grandis trees, taken from the Duratex-SA company stock, were thermally-modified between 180 °C and 220 °C in the Laboratory of Wood Drying and Preservation at Universidade Estadual Paulista -UNESP, Botucatu, Sao Paulo state Brazil. Samples of each treatment were tested according to the ASTM D-2017 (2008) technical norm. The accelerated decay caused by the brown-rot fungus G. trabeum was compared with the decay caused by the white-rot fungus P. sanguineus, studied by Calonego et al. (2010). The results showed that (1) brown-rot fungus caused greater decay than white-rot fungus; and (2) the increase in temperature from 180 to 220 °C caused reductions between 28.2% and 70.0% in the weight loss of E. grandis samples incubated with G. trabeum.

Behavior of Thermally Modified Wood to Biodeterioration by Xylophage Fungi

“…The increase in biodegradation by the white rot fungus, of wood modified at 160 °C in relation to thermal modification at 140 ° C, may have been caused by the alteration in the anatomical structure of the wood due to the increase in temperature, facilitating the penetration of the hyphae of the white rot fungus. Calonego et al (2013), when performing biodeterioration by the brown rot fungus in thermally modified E. grandis, also found a reduction in mass loss with increasing temperature. In the field of decomposition, modified wood of the genus Eucalyptus showed little loss of mass compared to natural wood (Knapic et al 2018).…”

Metabolomics Highlights Different Life History Strategies of White and Brown Rot Wood-Degrading Fungi

“…For instance, it has been shown that fast-growing white rot fungi cause faster wood decay compared to slow growers ( 22 ). However, brown rot fungi, which grow slower than white rot fungi, have consistently exhibited faster wood decay than white rotters, as evidenced by a higher weight loss rate, strength loss, carbohydrate degradation, and dilute alkaline solubility (DAS) relative to density loss ( 23 , 24 ). In this study, this feature was also confirmed by the higher loss of cellulose crystallinity in brown rot ( Fig.…”

Multi-omics analysis provides insights into lignocellulosic biomass degradation by Laetiporus sulphureus ATCC 52600

“…sulphureus ATCC 52600 genome does not resemble typical brown-rot fungi Genomic sequencing of lamentous fungi followed by transcriptomic and proteomic approaches has been widely employed to understand the strategies of microorganisms to degrade plant biomass (22)(23)(24)(25)(26)(27)(28). Overall, the L. sulphureus ATCC genome revealed only subtle differences compared to the previously sequenced L. sulphureus var.…”