Biologia Plantarum

, Volume 53, Issue 2, pp 351–354 | Cite as

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

  • J. Peñuelas
  • I. Filella
  • R. Seco
  • J. Llusià
Brief Communication


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.

Additional key words

light-dependent emissions net photosynthetic rate PTR-MS stomatal conductance temperature-dependent emissions VOCs 



volatile organic compounds


proton-transfer-reaction mass spectrometer


net photosynthetic rate


stomatal conductance


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© Springer Science+Business Media B.V. 2009

Authors and Affiliations

  1. 1.Unitat d’Ecofisiologia i Canvi Global CSIC-CEAB-CREAFUniversitat Autònoma de BarcelonaBellaterra, BarcelonaSpain

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