Role of needle surface waxes in dynamic exchange of mono- and sesquiterpenes

Show full item record



Permalink

http://hdl.handle.net/10138/165230

Citation

Joensuu , J , Altimir , N , Hakola , H , Rostas , M , Raivonen , M , Vestenius , M , Aaltonen , H , Riederer , M & Bäck , J 2016 , ' Role of needle surface waxes in dynamic exchange of mono- and sesquiterpenes ' , Atmospheric Chemistry and Physics , vol. 16 , no. 12 , pp. 7813-7823 . https://doi.org/10.5194/acp-16-7813-2016

Title: Role of needle surface waxes in dynamic exchange of mono- and sesquiterpenes
Author: Joensuu, Johanna; Altimir, Nuria; Hakola, Hannele; Rostas, Michael; Raivonen, Maarit; Vestenius, Mika; Aaltonen, Hermanni; Riederer, Markus; Bäck, Jaana
Contributor: University of Helsinki, Department of Forest Sciences
University of Helsinki, Department of Forest Sciences
University of Helsinki, Department of Physics
University of Helsinki, Department of Forest Sciences
Date: 2016
Language: eng
Number of pages: 11
Belongs to series: Atmospheric Chemistry and Physics
ISSN: 1680-7316
URI: http://hdl.handle.net/10138/165230
Abstract: Biogenic volatile organic compounds (BVOCs) produced by plants have a major role in atmospheric chemistry. The different physicochemical properties of BVOCs affect their transport within and out of the plant as well as their reactions along the way. Some of these compounds may accumulate in or on the waxy surface layer of conifer needles and participate in chemical reactions on or near the foliage surface. The aim of this work was to determine whether terpenes, a key category of BVOCs produced by trees, can be found on the epicuticles of Scots pine (Pinus sylvestris L.) and, if so, how they compare with the terpenes found in shoot emissions of the same tree. We measured shoot-level emissions of pine seedlings at a remote outdoor location in central Finland and subsequently analysed the needle surface waxes for the same compounds. Both emissions and wax extracts were clearly dominated by monoterpenes, but the proportion of sesquiterpenes was higher in the wax extracts. There were also differences in the terpene spectra of the emissions and the wax extracts. The results, therefore, support the existence of BVOC associated to the epicuticular waxes. We briefly discuss the different pathways for terpenes to reach the needle surfaces and the implications for air chemistry.
Subject: ORGANIC-COMPOUND EMISSIONS
SCOTS PINE
OZONE DEPOSITION
SEASONAL-VARIATION
PLANT VOLATILES
FOREST CANOPY
MONOTERPENE
WATER
ATMOSPHERE
CHEMISTRY
1172 Environmental sciences
4112 Forestry
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
acp_16_7813_2016.pdf 378.1Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record