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Schmack, J.* ; de Vries, A.* ; Spielmann, F.* ; Schnitzler, J.-P. ; Winkler, J.B. ; Weber, B. ; Wohlfahrt, G.* ; Karl, T.* ; Jud, W.*

Species-specific BVOC emission dynamics of Pinus sylvestris and Juniperus communis during different drought intensities.

Plant Stress 22, 16:101480 (2026)
Verlagsversion Forschungsdaten DOI
Open Access Gold
Creative Commons Lizenzvertrag
Climate change is shifting drought frequency and severity in alpine regions, affecting plant physiological processes, including the production and emission of biogenic volatile organic compounds (BVOCs), that influence atmospheric chemistry and the radiative properties of the atmosphere. While constitutive BVOC emissions are well-characterized for some plant species, drought-induced changes in monoterpene and sesquiterpene emissions remain poorly constrained, limiting predictions for future climate scenarios. We quantified the gas exchange of two conifer species, Pinus sylvestris and Juniperus communis , in a multi-week plant cuvette experiment with four drought intensity treatments. Continuous gas exchange measurements resolved temporal dynamics of CO₂ assimilation, transpiration, and BVOC emissions. Under severe drought, P. sylvestris maintained a positive carbon balance (21.0 g C m⁻² leaf area), while J. communis experienced net carbon loss (-0.48 g C m⁻² leaf area), reflecting contrasting carbon-uptake versus water-use strategies under drought stress. Total monoterpene emissions were largely drought-insensitive, although our data revealed a compound-specific regulation in P. sylvestris. Sesquiterpene emissions were strongly induced in both species, but diverged during the course of the experiment: sustained elevation in J. communis versus a bell-shaped response in P. sylvestris . Methyl salicylate responses were opposite: stress-induced and unimodal in P. sylvestris, but declining with drought severity in J. communis . These findings demonstrate that BVOC drought responses are determined by species-specific carbon balance and physiological thresholds rather than phylogeny alone, providing important insights for models of BVOC emission dynamics under climate change.
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Publikationstyp Artikel: Journalartikel
Dokumenttyp Wissenschaftlicher Artikel
Schlagwörter Alpine Conifers ; Common Juniper ; Drought Induced Bvocs ; Drought Stress ; Scots Pine ; Stomatal Optimization; Volatile Organic-compounds; Monoterpene Emissions; Stomatal Conductance; Plant Volatiles; Scots Pine; De-novo; Biosynthesis; Temperature; Responses; Isoprene
ISSN (print) / ISBN 2667-064X
e-ISSN 2667-064X
Zeitschrift Plant Stress
Quellenangaben Band: 22, Heft: , Seiten: 16, Artikelnummer: 101480 Supplement: ,
Verlag Elsevier
Verlagsort Radarweg 29, 1043 Nx Amsterdam, Netherlands
Begutachtungsstatus Peer reviewed
Institut(e) Research Unit Environmental Simulation (EUS)
Förderungen Austrian National Science Fund (FWF) through the project "The Future of Mountain Forests: responses to a drier climate"