A New Stable Isotope Approach Identifies the Fate of Ozone in Plant-Soil Systems

• We show that the stable isotope$^{18}O$can be used to trace ozone into different components of the plant-soil system at environmentally relevant concentrations. • We exposed plants and soils to$^{18}O-labelled$ozone and used isotopic enrichment in plant dry matter, leaf water and leaf apoplast, as...

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Bibliographic Details
Published in:The New phytologist 2009-04, Vol.182 (1), p.85-90
Main Authors: Toet, Sylvia, Subke, Jens-Arne, D'Haese, David, Ashmore, Mike R., Emberson, Lisa D., Crossman, Zoe, Evershed, Richard P., Barnes, Jeremy D., Ineson, Phil
Format: Article
Language:English
Subjects:
Dry matter accumulation
Fumigation
Leaves
Mineral soils
Ozone
Plants
Rapid Report
Sand soils
Soil water
Soil water content
Sustainable agriculture
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Summary:• We show that the stable isotope$^{18}O$can be used to trace ozone into different components of the plant-soil system at environmentally relevant concentrations. • We exposed plants and soils to$^{18}O-labelled$ozone and used isotopic enrichment in plant dry matter, leaf water and leaf apoplast, as well as in soil dry matter and soil water, to identify sites of ozone-derived$^{18}O$accumulation. • It was shown that isotopic accumulation rates in plants can be used to infer the location of primary ozone-reaction sites, and that those in bare soils are dependent on water content. However, the isotopic accumulation rates measured in leaf tissue were much lower than the modelled stomatal flux of ozone. • Our new approach has considerable potential to elucidate the fate and reactions of ozone within both plants and soils, at scales ranging from plant communities to cellular defence mechanisms.
ISSN:0028-646X
1469-8137
DOI:10.1111/j.1469-8137.2008.02780.x