Total amount of BVOCs emitted (µmol m<sup>2</sup>) and relative percentage (%) of the major ions representing the BVOCs blend emitted after transition from light to dark conditions in <i>Dactlylis glomerata</i>, <i>Quercus</i> ilex, <i>Populus alba</i> intact leaves and in <i>Populus alba</i> leaves after the petiole has been excised.

<p>Means ± SE are shown (<i>n</i> = 4). Differences between means within the same column were statistically assessed with a Tukey's post hoc test (<i>P</i><0.05).</p>