Emissions of monoterpenes linalool and ocimene respond differently to environmental changes due to differences in physico-chemical characteristics

摘要: Abstract We investigated the 13 C-labeling kinetics of emission two major monoterpenes emitted by needles Mediterranean conifer Pinus pinea L., monoterpene alcohol linalool and non-oxygenated trans - β -ocimene. These data were further used to develop parameterize a dynamics model, predicting emissions with contrasting physico-chemical properties environmental changes. All labeled C in short pulse-labeling experiments. experiments indicated for these comprising 77% total that part relied on recently synthesized carbon not specific storage compartments within resin ducts. However, labeling suggested existence transient pools, located needle aqueous lipid phases. For linalool, we found half-lives 13 min phase 3 h while -ocimene exhibit an half-life 2 15 min phase, overall indicating due limited volatility can significantly alter dynamics. The key characteristics determining time constants pools Henry's law constant (liquid/gas partition coefficient) octanol/water (lipid/liquid) coefficient. As vary over four orders magnitude coefficients three magnitude, capacity non-specific storage, damping effects rapidly changing conditions is expected strongly among different monoterpenes. Overall, our study suggests common phenomenon plant-emitted compounds.