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| Titel |
Volatile Organic Compound Emission from Quercus suber, Quercus canariensis, and its hybridisation product Quercus afares |
| VerfasserIn |
S. Welter, A. Bracho Nunez, M. Staudt, J. Kesselmeier |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250031552
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| Zusammenfassung |
| Oaks represent one of the most important plant genera in the Northern hemisphere and
include many intensively VOC emitting species. The major group constitutes the isoprene
emitters, but also monoterpene emitters and non-emitters can be found. These variations in
the oak species might partly be due to their propensity for inter- and intraspecific
hybridisation. This study addresses the foliar VOC production of the former hybridisation
product the deciduous Quercus afares and its parents, two very distant species: the evergreen
monoterpene emitter Quercus suber and the deciduous isoprene emitter Quercus canariensis.
The measurements were performed in Southern France, applying two different
methods. Plants were investigated in situ in the field with a portable gas exchange
measuring system as well as in the laboratory on cut branches with an adapted
enclosure system. Quercus afares was found to be a monoterpene emitting species.
However, the monoterpene emission was lower and the composition different to
that of Quercus suber. Whereas Quercus suber trees belonged to the pinene type
most individuals of Quercus afares were identified to represent a limonene type.
Quercus canariensis emitted besides high amounts of isoprene also linalool and
(Z)-3-hexenylacetate. Emissions from Quercus suber and Quercus afares were
higher in the field measurements than in the laboratory on cut branches whereas
Quercus canariensis exhibited lower isoprene emissions from cut branches. The
results demonstrate the need of further emission studies on a plant species level. |
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