Author: Timothy OwenPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Dothistroma septosporum Dorog. Morelet is an emergent fungal pathogen of pine responsible for increasingly severe and widespread damage in British Columbia. Native lodgepole pine (Pinus contorta var. latifolia) is considered highly susceptible, but has been extensively planted due to its commercial value. Current management options involve either avoidance or species diversification. Quantitative resistance to Dothistroma has been observed in several pine species, and further identification of resistant lodgepole pine varieties is important for future management of the disease. My objectives were to determine the historical climatic influences on constitutive foliar terpene levels, identify foliar secondary metabolites associated with resistance and historical disease pressure, and to ascertain the in vitro effects of these compounds. I quantified foliar secondary metabolites from both seed orchard and resistance trial lodgepole pines, many of which were identified as terpenes. I quantified the Dothistroma outbreak history of lodgepole pine provenances using dendrochronological methods, and the climate history of these provenances using an interpolated historical climate model. I found that constitutive foliar levels of specific terpenes significantly correlated (P