The penetration and growth of blue-stain fungi in the sapwood of lodgepole pine attacked by mountain pine beetle
- 1 August 1984
- journal article
- research article
- Published by Canadian Science Publishing in Canadian Journal of Botany
- Vol. 62 (8) , 1724-1729
- https://doi.org/10.1139/b84-233
Abstract
The growth of blue-stain fungi [Hyalorhinocladiella, Verticicladiella and Leptographium] was investigated in naturally blue-stained P. contorta var. latifolia Engelm. sapwood. Events occurring at the leading edge of hyphal penetration were studied. Fungi are initially confined to the sapwood rays. Hyphae rapidly penetrate the primary cell walls of ray parenchyma cells and proliferate within. Hyphae also grow freely in the region of the middle lamella of the rays. Host cell walls are breeched mechanically by a penetration peg originating from an appressoriumlike structure. Eventually, hyphae enter tracheids by penetrating the primary cell walls of pinoid, half-bordered pit pairs. Within the tracheid, fungal hyphae grow in a longitudinal fashion, branching infrequently. Hyphae may pass from tracheid to tracheid via bordered pit pairs. Ensuing water stress and eventual tree death is discussed in light of histological evidence presented.This publication has 2 references indexed in Scilit:
- Blue-stain fungi in xylem of lodgepole pine: a light-microscope study on extent of hyphal distributionCanadian Journal of Botany, 1982
- Host resistance to the fir engraver beetle. 3. Lesion development and containment of infection by resistant Abies grandis inoculated with Trichosporium symbioticumCanadian Journal of Botany, 1977