TY  - JOUR
A1  - Joensuu, Johanna
A1  - Altimir, Nuria
A1  - Hakola, Hannele
A1  - Rostás, Michael
A1  - Raivonen, Maarit
A1  - Vestenius, Mika
A1  - Aaltonen, Hermanni
A1  - Riederer, Markus
A1  - Bäck, Jaana
T1  - Role of needle surface waxes in dynamic exchange of mono- and sesquiterpenes
JF  - Atmospheric Chemistry and Physics
N2  - 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.
KW  - needle surface waxes
KW  - biogenic volatile organic compounds
KW  - Pinus sylvestris L.
KW  - atmospheric chemistry
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-171324
VL  - 16
IS  - 12
ER  - 
TY  - JOUR
A1  - Joensuu, Johanna
A1  - Altimir, Nuria
A1  - Hakola, Hannele
A1  - Rostás, Michael
A1  - Raivonen, Maarit
A1  - Vestenius, Mika
A1  - Aaltonen, Hermanni
A1  - Riederer, Markus
A1  - Bäck, Jaana
T1  - Role of needle surface waxes in dynamic exchange of mono- and sesquiterpenes
JF  - Atmospheric Chemistry and Physics
N2  - 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.
KW  - Biogenic
KW  - volatile
KW  - organic
KW  - compounds
Y1  - 2016
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-198547
VL  - 16
ER  -