Light-dependent monoterpene emissions from an oak species native to Asia

Abstract

This is the first report of light-dependent monoterpene emissions from an oak species native to Asia. Isoprenoids emitted by Querem phillyraeoides were measured using branch enclosure methods. Sabinene, and. α- and β-pinenes were the major compounds accounting for more than 90% of the total monoterpene emissions. The basal, emission rates of total, monoterpenes on leaf area and leaf dry weight bases ranged from 0.07 to 6.30 nmol m -2 s -1 and from 0.22 to 14.3 μg g -1 h -1, respectively. A proton transfer reaction mass spectrometry measurement revealed that the emissions depend significantly on light intensity and leaf temperature. Q. phillyraeoides may be taxonomically close to European, monoterpene-emitting oaks because it is morphologically close to the oaks native to the Mediterranean area, and because the geographical features of their habitats are similar to each, other.