Biosynthesis of resin terpenes in leaves and glandular hairs of Newcastelia viscida
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Label from 14CO2 and [2-14C]mevalonic acid was incorporated into resin components of Newcastelia viscida. About 25% of the label from [2-14C]MVA was incorporated into resin components after 4 h. Approximately 80% of the label in the resin was in a TLC band coinciding with the major terpenoid components, with 60% associated with the major tricyclic diterpene, a pimaradiene which contributes 15% to the leaf resin dry weight. Experiments with detached trichomes showed about 0·01% incorporation of label from [2-14C]MVA into pimaradiene, with most of the [abel being associated with β-sitosterol. It is proposed that the glandular hairs are the sites of terpene resin synthesis, as well as secretion, in this species.
|Publication Type:||Journal Article|
|Murdoch Affiliation:||School of Environmental and Life Sciences|
|Publisher:||Oxford University Press|
|Copyright:||© Oxford University Press|
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