The foliage terpenoids of Callitropsis nootkatensis: Comparison of oils from cultivated and natural trees
Adams RP, Russell JH, Hunter G, Fairhall TA, Dillman K, Corbet M. 2014. The foliage terpenoids of Callitropsis nootkatensis: Comparison of oils from cultivated and natural trees. Phytologia. 96(2):135-148
Variation in the leaf terpenoids of Callitropsis nootkatensis was examined between cultivated and natural trees for four cases: Case I. Comparison of individual terpene concentrations and oil yields of Rennel Sound Pass trees grown in two sites (CLRS, JR) on Vancouver Island, BC revealed two significant (myrcene, a-terpinyl acetate) and one highly significant difference (terpinolene). No significant difference was found in % oil yield. PCO ordination showed that the CLRS and JR samples were interspersed, not separated by plantation site, suggesting the variation was mostly under genetic control rather than environmentally induced. Case II. ANOVA of oils from cultivated trees (CLRS site) compared to natural trees at John Day, OR showed that the concentrations of five of the six major monoterpenes were significantly or highly significantly different. However, % oil yield was not significantly different. PCO ordination revealed 3 chemotypes in which natural (John Day) trees were interspersed, implying that genetically controlled differences may be largely responsible for the ordination pattern. Case III. ANOVA of oils from cultivated trees at JR site compared to natural trees at Mt. Angeles, WA revealed two terpenes were highly significantly different and another significantly different in concentration. There was no significant difference in % oil yields. PCO showed the samples from cultivated and natural trees were mostly interspersed, pointing to genetic control rather than environmental factors for the Pattern. CASE IV. ANOVA comparing oils from cultivated trees (CLRS) verses natural trees at Mitkof Island, AK found no significant differences in any terpenoid or % oil yields. However, two chemotypes were found among the terpenoides in both cultivated and natural trees. The Mitkof Island case presents clear evidence that environmentally induced differences between oils from cultivated or natural trees has far less of an influence in comparison to chemotype (genetic) idfferences among individuals whether from cultivation, or natural populations of C. nootkatensis. Overall, in these four cases, it appears that the genetic component is much greater than the environmental component in determining both oil yields, and composition in the C. nootkatensis studied.
- Type
- Journal Article
- Authors
- Adams, Robert; Russell, John; Hunter, Gay; Fairhall, Thomas; Dillman, Karen; Corbet, Mark
- Units
- OLYM
- Keywords
- Alaska yellow cedar, Chamaecyparis nootkatensis, Environment, Terpenes