| Title: | "Emission of constitutive isoprene, induced monoterpenes, and other volatiles under high temperatures in Eucalyptus camaldulensis: A (13) C labelling study" |
| Author(s): | Guidolotti G; Pallozzi E; Gavrichkova O; Scartazza A; Mattioni M; Loreto F; Calfapietra C; |
| Address: | "Institute of Research on Terrestrial Ecosystems (IRET), National Research Council of Italy (CNR), Monterotondo Scalo, 01500, Italy. Institute of Research on Terrestrial Ecosystems (IRET), National Research Council of Italy (CNR), Porano, 05010, Italy. Department of Landscape Design and Sustainable Ecosystems, Agrarian-technological Institute, RUDN University, Moscow, 117198, Russia. Institute of Research on Terrestrial Ecosystems (IRET), National Research Council of Italy (CNR), Pisa, 56124, Italy. Department of Biology, Agriculture and Food Sciences (DISBA), National Research Council of Italy (CNR), Rome, 00185, Italy" |
| ISSN/ISBN: | 1365-3040 (Electronic) 0140-7791 (Linking) |
| Abstract: | "Eucalypts are major emitters of biogenic volatile organic compounds (BVOCs), especially volatile isoprenoids. Emissions and incorporation of (13) C in BVOCs were measured in Eucalyptus camaldulensis branches exposed to rapid heat stress or progressive temperature increases, in order to detect both metabolic processes and their dynamics. Isoprene emission increased and photosynthesis decreased with temperatures rising from 30 degrees C to 45 degrees C, and an increasing percentage of unlabelled carbon was incorporated into isoprene in heat-stressed leaves. Intramolecular labelling was also incomplete in isoprene emitted by heat-stressed leaves, suggesting increasing contribution of respiratory (and possibly also photorespiratory) carbon. At temperature above 45 degrees C, a drop of isoprene emission was mirrored by the appearance of unlabelled monoterpenes, green leaf volatiles, methanol, and ethanol, indicating that the emission of stored volatiles was mainly induced by cellular damage. Emission of partially labelled acetaldehyde was also observed at very high temperatures, suggesting a double source of carbon, with a large unlabelled component likely transported from roots and associated to the surge of transpiration at very high temperatures. Eucalypt plantations cover large areas worldwide, and our findings may dramatically change forecast and modelling of future BVOC emissions at planetary level, especially considering climate warming and frequent heat waves" |
| Keywords: | Butadienes/*metabolism Carbon Dioxide Eucalyptus/*metabolism Hemiterpenes/*metabolism *Hot Temperature Italy Monoterpenes/*metabolism Photosynthesis Plant Leaves/metabolism Staining and Labeling Volatile Organic Compounds/*metabolism 13c Eucalyptus camald; |
| Notes: | "MedlineGuidolotti, Gabriele Pallozzi, Emanuele Gavrichkova, Olga Scartazza, Andrea Mattioni, Michele Loreto, Francesco Calfapietra, Carlo eng Research Support, Non-U.S. Gov't 2019/01/22 Plant Cell Environ. 2019 Jun; 42(6):1929-1938. doi: 10.1111/pce.13521. Epub 2019 Mar 12" |
