Canadian Forest Service Publications

Wood cell wall degradation of Betula papyrifera by Lentinula edodes. 2002. Tsuneda, A.; Koshitani, H.; Hiratsuka, Y. Reports of the Tottori Mycological Institute 40: 1-10.

Year: 2002

Available from: Northern Forestry Centre

Catalog ID: 31797

Language: English

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Abstract

Mode of cell wall degradation of Betula papyrifera sapwood from western Canada by L. edodes varied with type of wood tissue, viz., vessels, rays, or fibers. Two distinct modes of simultaneous cell wall degradation occurred in vessels: i.e., generalized thinning and formation of localized boreholes. During the process of generalized wall thinning, both cellulose fibrils and matrix material degraded simultaneously and progressively from the lumen side toward the middle lamella. The boreholes were often associated with hyphal cushions consisting of main hyphae and numerous, determinate side branches at random angles. No preferential removal of matrix substances (lignin and hemicelluloses) was evident. In rays, middle lamellae were first removed and then boreholes developed in the secondary wall. Unlike in vessels and rays, matrix material of secondary walls of fibers appeared to be preferentially removed and the walls became porous and swollen before heavily degraded by hyphae. We surmise that subtle differences in physicochemical properties between different tissues brought about the variation in the mode of wall degradation. (author abst.)

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