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Ability of Selected Basidiomycetous Fungi to Decay Black Locust Wood

Szczepkowski Andrzej, Referowska Ewa, Lachowicz Hubert, Bijak Szymon

Drewno : prace naukowe, doniesienia, komunikaty

2025

Vol. 68, nr 215

Art. no. 200172

Black locust (Robinia pseudoacacia L.) is a non-native tree species widespread all over Europe that has already gained some commercial importance. This study assessed the ability of selected basidiomycetous fungi (Coniophoraputeana, Heterobasidionannosum, Trametes versicolor, Fomitiporia robusta) to decay black locust wood, based on the dry mass loss during a 16-week decay test. Wood samples were collected in the Głogów Forest District (SW Poland) and represented three age classes (38, 60 and 71 years). The density of the investigated wood ranged from 612 to 907 kg/m3 and significantly decreased with tree age (p < 0.001). The recorded mass loss ranged from 0.00% to 5.81%, amounting to 1.03% on average. We found that the resistance of black locust wood significantly increased with tree age (p = 0.011). Also, the observed mass loss differed significantly between fungal species (p < 0.001). The highest values were recorded for T. versicolor (mean = 2.14%). Comparing two F. robusta strains, we found significantly smaller mass loss for black locust wood than for oak wood (p < 0.001). The investigated strains caused greater mass loss in the wood of the species from which they had been isolated (p = 0.021 and p = 0.049 for locust and oak, respectively). Our findings confirm the hypothesis that black locust wood is highly resistant to fungal decay.