Chemical Basis of the Resistance in Pines to Scleroderris Canker : Shoot and Foliage Diseases in Forest Trees. Proceedings of a Joint Meeting of the Working Parties Canker and Shoot Blight of Conifers (S2.06.02) Foliage Diseases (S2.06.04)

Florenz

1995

S. 166-172

26 Lit. Ang.

Bandaufführung

77405

Pines, in this study Pinus sylvestris, are usually resistant to Scleroderris canker, but the disease can break out following unfavourable environmental conditions, e.g. abnormally cool, short or wet growing seasons, or at unfavourable sites. The secondary metabolites, monoterpenes, resin acids and phenols, may also play an important role in defence mechanism against Scleroderris canker. The material of this study was collected during the dormant period from the seedlings, the origins of which are from seven sites in Finland and two sites in Estonia. All the provenances were grown at three sites, one in Estonia and two in Finland forming a gradient of about 1000km running from south to north. The aim of this study is to abtain basic information about the effects of transferring pine provenances to more favourable or unfavourable climatic conditions on the production of secondary metabolites. The results indicate, that the effect of the origin of the seedling material on the concentrations of secondary compounds is not as important as the effect of environment at these three growing sites.