biologia plantarum

International journal on Plant Life established by Bohumil Němec in 1959

Biologia plantarum 53:351-354, 2009 | DOI: 10.1007/s10535-009-0065-4

Increase in isoprene and monoterpene emissions after re-watering of droughted Quercus ilex seedlings

J. Peñuelas1,*, I. Filella1, R. Seco1, J. Llusià1
1 Unitat d'Ecofisiologia i Canvi Global CSIC-CEAB-CREAF, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Spain

We followed the diurnal cycles of isoprenoid emissions from Quercus ilex seedlings under drought and after re-watering. We found that Quercus ilex, generally considered a non-isoprene emitter, also emitted isoprene although at low rates. The emission rates of isoprene reached 0.37 ± 0.02 nmol m-2 s-1 in controls, 0.15 ± 0.03 nmol m-2 s-1 under drought and 0.35 ± 0.04 nmol m-2 s-1 after re-watering, while emission rates of monoterpenes reached 11.0 ± 3.0, 7.0 ± 1.0 and 23.0 ± 5.0 nmol m-2 s-1, respectively. Emission rates recovered faster after re-watering than photosynthetic rate and followed diurnal changes in irradiance in controls and under drought, but in leaf temperature after re-watering.

Keywords: light-dependent emissions; net photosynthetic rate; PTR-MS; stomatal conductance; temperature-dependent emissions; VOCs
Subjects: drought stress and tolerance; isoprene; leaf temperature; monoterpene; photosynthetic rate; Quercus ilex; rehydration; stomatal conductance; water stress

Received: September 8, 2007; Accepted: January 20, 2008; Published: June 1, 2009  Show citation

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Peñuelas, J., Filella, I., Seco, R., & Llusià, J. (2009). Increase in isoprene and monoterpene emissions after re-watering of droughted Quercus ilex seedlings. Biologia plantarum, 53(2), 351-354. doi: 10.1007/s10535-009-0065-4
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