Canadian Forest Service Publications

Succession des micro-organismes à la suite de blessures artificielles au tronc chez le bouleau jaune (Betula alleghaniensis Britt.) et l'érable à sucre (Acer saccharum Marsh.) 1971. Lavallee, A.; Bard, A. Canadian Journal of Forest Research 1(2) : 113-120.

Year: 1971

Available from: Laurentian Forestry Centre

Catalog ID: 15461

Language: French

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Xylem of sugar maple and yellow birch trees were exposed to natural infection by making axe blazes to simulate mechanical injuries. After 8, 21, and 34 months, dissection and isolations made from the discolored wood permitted the localization of certain microorganisms in three arbitrarily determined zones. Longitudinal and radial development of discoloration associated with wounds was more rapid in yellow birch than in sugar maple. There was evidence of a succession of organisms in the colonization of the wounds which was subsequent to the first discoloration process and involved different organisms in the two hosts. In general, decay fungi did not appear until after 21 months. Cyrospora decipiens occurred exclusively in discolored wood of sugar maple while Phialophora spp. and Cephalosporium sp. dominated the discolored wood of yellow birch. Bacteria were more frequent in yellow birch than in sugar maple. Relationships between size of injuries, linear extent of the discoloration produced, and identity of the various organisms involved are also presented.

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