Light dependency of VOC emissions from selected Mediterranean plant species |
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| Institution: | 1. College of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;2. Institute of Ecology, College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing 100871, China;3. Ji County Station, Chinese National Ecosystem Research Network (CNERN), Beijing 100083, China;4. Key Laboratory of State Forestry Administration on Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;5. Beijing Engineering Research Center of Soil and Water Conservation, Beijing Forestry University, Beijing 100083, China;6. Engineering Research Center of Forestry Ecological Engineering, Ministry of Education, Beijing Forestry University, Beijing 100083, China;7. Beijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit Trees, 102206 Beijing, China;8. Beijing Water Consulting Co., LTD, 100048 Beijing, China;1. Institute for Agricultural and Forestry Systems in the Mediterranean, National Research Council of Italy (ISAFOM-CNR), Piazzale Enrico Fermi, 1- 80055, Portici (Napoli), Italy;2. University of Naples “Federico II”, Department of Biology, via Cinthia 7 – 80126, Napoli, Italy;3. Institute for Sustainable Plant Protection, National Research Council of Italy (IPSP-CNR), Via Madonna del Piano 10 - 50017, Sesto Fiorentino (Firenze), Italy;4. Institute of Bioeconomy, National Research Council of Italy (IBE-CNR), Via G. Caproni 8 - 50145, Firenze, Italy;5. Université Paris-Saclay, INRAE, AgroParisTech, UMR ECOSYS, 78850, Thiverval-Grignon, France |
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| Abstract: | The light, temperature and stomatal conductance dependencies of volatile organic compound (VOC) emissions from ten plant species commonly found in the Mediterranean region were studied using a fully controlled leaf cuvette in the laboratory. At standard conditions of temperature and light (30°C and 1000 μmol m?2 s?1 PAR), low emitting species (Arbutus unedo, Pinus halepensis, Cistus incanus, Cistus salvifolius, Rosmarinus officinalis and Thymus vulgaris) emitted between 0.1 and 5.0 μg (C) (total VOCs) g?1 dw h?1, a medium emitter (Pinus pinea) emitted between 5 and 10 μg (C) g?1 dw h?1 and high emitters (Cistus monspeliensis, Lavendula stoechas and Quercus sp.) emitted more than 10 μg (C) g?1 dw h?1. VOC emissions from all of the plant species investigated showed some degree of light dependency, which was distinguishable from temperature dependency. Emissions of all compounds from Quercus sp. were light dependent. Ocimene was one of several monoterpene compounds emitted by P. pinea and was strongly correlated to light. Only a fraction of monoterpene emissions from C. incanus exhibited apparent weak light dependency but emissions from this plant species were strongly correlated to temperature. Data presented here are consistent with past studies, which show that emissions are independent of stomatal conductance. These results may allow more accurate predictions of monoterpene emission fluxes from the Mediterranean region to be made. |
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