Short-chained oxygenated VOC emissions in Pinus halepensis in response to changes in water availability

Iolanda Filella, Josep Peñuelas, Roger Seco

    Research output: Contribution to journalArticleResearchpeer-review

    32 Citations (Scopus)

    Abstract

    Short-chained oxygenated VOC (oxVOCs) emissions from Pinus halepensis saplings were monitored in response to changes in water availability. Online measurements were made with a proton transfer reaction-mass spectrometer under controlled conditions, together with CO2 and H2O exchange measurements. Masses corresponding to methanol and acetone were the most emitted oxVOCs. All the oxVOC exchanges, except that of acetone (M59), were significantly related to stomatal conductance and transpiration. Acetaldehyde (M45) emission showed, moreover, a strong dependence on the concentration of acetaldehyde in the ambient: stomatal opening (stomatal conductance above 75 mmol m-2 s-1) only allowed increased emissions when external concentration were below 6 ppb. Acetone (M59) presented an important peak of emission following light and stomatal opening in the morning when plants were water stressed. Thus, the alterations in oxVOC emissions in P. halepensis caused by the water deficit seem to be mainly driven by water stress effect on stomatal closure and oxVOC air concentrations. © 2008 Franciszek Górski Institute of Plant Physiology, Polish Academy of Sciences, Kraków.
    Original languageEnglish
    Pages (from-to)311-318
    JournalActa Physiologiae Plantarum
    Volume31
    Issue number2
    DOIs
    Publication statusPublished - 1 Mar 2009

    Keywords

    • Acetaldehyde
    • Acetic acid
    • Acetone
    • Drought
    • Ethanol
    • Formic acid
    • Methanol
    • OxVOCs
    • Pinus halepensis

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