Ecology and decay pattern of Phellinus robustus in old-growth Quercus robur

Authors: Sunhede, Stellan & Vasiliauskas, Rimvydas
Journal: Karstenia, Volume 42 (2002), Issue 1, pages 1-11.
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Key words: Biodiversity, decay pattern, ecology, forestry, Lithuania, Phellinus robustus, Quercus robur, vegetative incompatibility

Abstract: The biology of Phellinus robustus (P. Karst.) Bourdot & Galzin (Hymenochaetales) was studied on Quercus robur L. in Lithuania, based on 677 host trees. Basidiocarp occurrence related to the diameter of the oaks and spatial distribution of basidiocarps on the trees are presented. Distribution of decay in eight sectioned, 110 –175 year-old oaks showed one to three 0.1–5.8 m long, vertically separated rot columns. Vegetative compatibility tests indicated that each rot column was made up of a single genet of P. robustus and that the rot columns in the eight studied trees represented different genets. Infection routes, parasitic and saprotrophic behaviour, age of basidiocarps, forestry and biodiversity aspects are discussed. Illustrations show geographical distribution of the species in Lithuania, distribution of infected oaks in an old oak stand, frequency of infected trees related to diameter of the trunks, and distribution of decay in longitudinal and cross sections of trunks. Colour photos show distribution of white rot in the substrate, aerial mycelium on sectioned wood, and confrontation tests between cultivated mycelia of the same and different genets.