| Title: | The effect of ozone fumigation on the biogenic volatile organic compounds (BVOCs) emitted from Brassica napus above- and below-ground |
| Author(s): | Acton WJF; Jud W; Ghirardo A; Wohlfahrt G; Hewitt CN; Taylor JE; Hansel A; |
| Address: | "Lancaster Environment Centre, Lancaster University, Lancaster, United Kingdom. Institute of Ion and Applied Physics, University of Innsbruck, Innsbruck, Austria. Helmholtz Zentrum Munchen, Institute of Biochemical Plant Pathology, Research Unit Environmental Simulation (EUS), Neuherberg, Germany. Institute of Ecology, University of Innsbruck, Innsbruck, Austria" |
| DOI: | 10.1371/journal.pone.0208825 |
| ISSN/ISBN: | 1932-6203 (Electronic) 1932-6203 (Linking) |
| Abstract: | "The emissions of BVOCs from oilseed rape (Brassica napus), both when the plant is exposed to clean air and when it is fumigated with ozone at environmentally-relevant mixing ratios (ca. 135 ppbv), were measured under controlled laboratory conditions. Emissions of BVOCs were recorded from combined leaf and root chambers using a recently developed Selective Reagent Ionisation-Time of Flight-Mass Spectrometer (SRI-ToF-MS) enabling BVOC detection with high time and mass resolution, together with the ability to identify certain molecular functionality. Emissions of BVOCs from below-ground were found to be dominated by sulfur compounds including methanethiol, dimethyl disulfide and dimethyl sulfide, and these emissions did not change following fumigation of the plant with ozone. Emissions from above-ground plant organs exposed to clean air were dominated by methanol, monoterpenes, 4-oxopentanal and methanethiol. Ozone fumigation of the plants caused a rapid decrease in monoterpene and sesquiterpene concentrations in the leaf chamber and increased concentrations of ca. 20 oxygenated species, almost doubling the total carbon lost by the plant leaves as volatiles. The drop in sesquiterpenes concentrations was attributed to ozonolysis occurring to a major extent on the leaf surface. The drop in monoterpene concentrations was attributed to gas phase reactions with OH radicals deriving from ozonolysis reactions. As plant-emitted terpenoids have been shown to play a role in plant-plant and plant-insect signalling, the rapid loss of these species in the air surrounding the plants during photochemical pollution episodes may have a significant impact on plant-plant and plant-insect communications" |
| Keywords: | "Brassica napus/*metabolism/parasitology *Fumigation Ozone/*pharmacology Plant Components, Aerial/*metabolism/parasitology Plant Roots/*metabolism/parasitology Volatile Organic Compounds/*metabolism;" |
| Notes: | "MedlineActon, W J F Jud, W Ghirardo, A Wohlfahrt, G Hewitt, C N Taylor, J E Hansel, A eng BB/I015442/1/Biotechnology and Biological Sciences Research Council/United Kingdom Research Support, Non-U.S. Gov't 2018/12/12 PLoS One. 2018 Dec 10; 13(12):e0208825. doi: 10.1371/journal.pone.0208825. eCollection 2018" |
