ANALYSIS OF MONOTERPENES EMITTED AND ABSORBED BY UNDAMAGED BOLES OF LODGEPOLE PINE

The qualitative and quantitative composition of volatile compounds emitted and absorbed by undamaged boles of lodgepole pine trees (Pinus contorta murrayana) was determined by trapping the compounds on activated charcoal in the field. Among eight samples, each from a different tree, total volatile flux ranged between 60.61 μg m-2 day-1 emitted and 0.61 μg m-2 day-1 absorbed to give a mean of 11.89 μg m-2 day-1 emitted. The main compounds emitted were β-phellandrene, p-cymene, β-pinene, an oxygenated monoterpene, and α-pinene. Absorption of β-pinene from that present in ambient forest air was observed in two samples. © 1990.