Within-plant isoprene oxidation confirmed by direct emissions of oxidation products (Articolo in rivista)

Type
Label
  • Within-plant isoprene oxidation confirmed by direct emissions of oxidation products (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Alternative label
  • Jardine K., Monson R.K, Abrell L., Saleska S.R., Arneth A., Jardine A., Yoko Ishida F., Yanez Serrano A.M., Artaxo P., Karl T., Fares S., Goldstein A., Loreto F., Huxman T. (2012)
    Within-plant isoprene oxidation confirmed by direct emissions of oxidation products
    in Global change biology (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Jardine K., Monson R.K, Abrell L., Saleska S.R., Arneth A., Jardine A., Yoko Ishida F., Yanez Serrano A.M., Artaxo P., Karl T., Fares S., Goldstein A., Loreto F., Huxman T. (literal)
Pagina inizio
  • 973 (literal)
Pagina fine
  • 984 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 18 (literal)
Rivista
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1) Jardine K., Jardine A, Huxman T.; 2) Monson R.K; 3) Abrell L.; 4) Abrell L. 5) Saleska S.R., Huxman T ; 6) Arneth A.; 7) Arneth A.; 8) Yoko Ishida F., Yanez Serrano A.M.; 9) Artaxo P.; 10) Karl T.; 11) Fares S.; 12) Goldstein A. 1) The University of Arizona-Biosphere 2, Tucson, AZ 85738, USA, 2) School of Natural Resources and the Environment, University of Arizona, Biological Sciences East, Tucson, AZ 85721, USA 3) Department of Chemistry & Biochemistry, University of Arizona, P.O. Box 210041, 1306 East University Blvd., Tucson, AZ 85721-0041, USA 4) Department of Soil, Water & Environmental Science, University of Arizona, Tucson, Arizona, USA 5) Department of Ecology and Evolutionary Biology, University of Arizona, P.O. Box 210088, BioSciences West 310, Tucson, AZ, 85721, USA 6) Department of Physical Geography and Ecosystems Analysis, Lund University, Sölvegatan 12, 223 62 Lund, 23 Sweden 7) Research Centre Karlsruhe, Institute for Meteorology and Climate Research (IMK-IFU), Garmisch-Partenkirchen, 26 Germany 8) Large Biosphere-Atmosphere Experiment (LBA), Instituto Nacional de Pesquisas da Amazônia, Av. André Araújo, 2936, Aleixo, CEP 69060-001, Manaus, Brazil 9) Instituto de Fisica Rua do Matao, Universidade de Sao Paulo, Travessa R,187 Sao Paulo SP 05508-900, Brazil 10) Atmospheric Chemistry Division, National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307-3000, USA 11) Agricultural Research Council (CRA), Research Center for the Soil Plant System, Via della Navicella 2-4, 00184 37 Rome, Italy 12) Department of Environmental Science, Policy, and Management, University of California, 130 Mulford Hall 3114 Berkeley, CA, 94720, USA (literal)
Titolo
  • Within-plant isoprene oxidation confirmed by direct emissions of oxidation products (literal)
Abstract
  • Isoprene is emitted from many terrestrial plants at high rates, accounting for an estimated 1/3 of annual global volatile organic compound emissions from all anthropogenic and biogenic sources combined. Through rapid photooxidation reactions in the atmosphere, isoprene is converted to a variety of oxidized hydrocarbons, providing higher-order reactants for the production of organic nitrates and tropospheric ozone, reducing the availability of oxidants for the breakdown of radiatively-active trace gases such as methane, and potentially producing hygroscopic particles that act as effective cloud condensation nuclei. However, the functional basis for plant production of isoprene remains elusive. It has been hypothesized that in the cell isoprene mitigates oxidative damage during the stress-induced accumulation of reactive oxygen species (ROS), but the products of isoprene-ROS reactions in plants have not been detected. Using pyruvate-2-1360 C leaf and branch feeding and individual branch and whole mesocosm flux studies, we present evidence that isoprene (i) is oxidized to methyl vinyl ketone and methacrolein (iox) in leaves and that iox/i emission ratios increase with temperature, possibly due to an increase in ROS production under high temperature and light stress. In a primary rainforest in Amazonia, we inferred significant in-plant isoprene oxidation (despite the strong masking effect of simultaneous atmospheric oxidation), from its influence on the vertical distribution of iox uptake fluxes, which were shifted to low isoprene emitting regions of the canopy. These observations suggest that carbon investment in isoprene production is larger than that inferred from emissions alone and that models of tropospheric chemistry and biota-chemistry-climate interactions should incorporate isoprene oxidation within both the biosphere and the atmosphere with potential implications for better understanding both the oxidizing power of the troposphere and forest response to climate change (literal)
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