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

Author:
Peñuelas, J., Filella, I., Seco, R., Llusià, J.
Source:
Biologia plantarum 2009 v.53 no.2 pp. 351-354
ISSN:
0006-3134
Subject:
Quercus ilex, diurnal variation, drought, emissions, isoprene, leaves, light intensity, monoterpenoids, photosynthesis, seedlings, temperature
Abstract:
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.
Agid:
2190386