New facts on host-parasite relationships in the Hypoxylon [pruinatum] canker of Aspen

Authors

Martin Hubbes

Document Type

Article

Journal/Book Title/Conference

Canadian Journal of Botany

Volume

42

Issue

11

First Page

1489

Last Page

1494

Publication Date

1964

Abstract

The isolation of Hypoxylon pruinalum (Klotzsche) Cke. from discolored wood beyond visible canker limits provided the first indication that this fungus invades xylem under sound bark of Populus tremuloides Michx. The strong inhibition of the fungus growth on bark meal agar and the active growth on wood meal agar is another demonstration of this particular host and parasite interaction. Further evidence for this behavior was obtained experimentally with living bark and wood of aspen. These studies have also shown that the fungus produces diffusible substances toxic to the living host tissues. It is concluded that H. pruinatum is a sapwood parasite.

Recommended Citation

Hubbes, Martin. 1964. New facts on host-parasite relationships in the Hypoxylon canker of Aspen. Canadian Journal of Botany 42(11):1489-1494.