Canadian Forest Service Publications

Quelques changements histologiques chez trois essences forestières inoculées avec Ophiostoma ulmi, pathogène de la maladie hollandaise de l'orme. 1988. Rioux, D.; Ouellette, G.B. Naturaliste Canadien 115 : 173-178.

Year: 1988

Available from: Laurentian Forestry Centre

Catalog ID: 16557

Language: French

CFS Availability: PDF (request by e-mail)

Abstract

Three nonhost species have been inoculated with Ophiostoma ulmi (Buism.) Nannf.: Prunus pensylvanica L. f., Populus balsamifera L. and Sorbus americana Marsh. Bubbles and gels formed constantly in the majority of the vessel members of the invaded xylem of P. pensylvanica. Around 5 days following inoculation, the cambial zone of this species presented an abnormal aspect. With P. balsamifera, tyloses were observed in vessel members within 8 days after inoculation. The cambium of these two species reacted to the presence of O. ulmi by producing barrier zones. With S. americana, there was an accumulation of a substance in the invaded xylem which seemingly inhibited the pathogen.

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