Carbon monoxide photoproduction from rice and maize leaves |
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| Institution: | 1. National Institute of Agro-Environmental Sciences, Kannondai, Tsukuba 305-8604, Japan;2. University Farm, Kagawa University, Nagao, Kagawa 769-23, Japan;1. Departament of Physics, Federal Institute of Education, Science and Technology of Pará, IFPA, Bragança, PA, Brazil;2. Departament of Environmental Engineering, Federal University of Paraná, UFPR, Caixa Postal 19100, Curitiba, PR 81531-990, Brazil;3. Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, USA;4. Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, USA;1. Instituto INIBIOMA (CRUB Comahue, CONICET), Quintral 1250, 8400 S.C. de Bariloche, Rio Negro, Argentina;2. Institut de Ciències del Mar, CSIC, Passeig Marítim de la Barceloneta 37-49, 08003 Barcelona, Catalonia, Spain;3. Takuvik Joint International Laboratory and Québec-Océan, Université Laval, Québec, QC, Canada G1V OA6;4. Laboratory of Microbial Processes and Biodiversity, Department of Hydrobiology, Federal University of São Carlos, São Carlos, Brazil;1. Key Laboratory of Virtual Geographic Environment (Nanjing Normal University), Ministry of Education, Nanjing, Jiangsu 210023, China;2. State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province), Nanjing, Jiangsu 210023, China;3. Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application, Nanjing, Jiangsu 210023, China;4. Department of Geography, University of Wisconsin-Madison, Madison, USA;5. School of Integrative Plant Sciences, Section of Soil & Crop Sciences, Cornell University, Ithaca, NY 14853, USA;1. Leibniz Institute for Tropospheric Research, Leipzig, Germany;2. Institute for Environmental and Climate Research, Jinan University, Guangzhou, China;3. Max Planck Institute for Chemistry, Mainz, Germany;4. Sukachev Institute of Forest, Siberian Branch of the Russian Academy of Science, Krasnoyarsk, Russia;5. Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA;1. CSIR-National Institute of Oceanography, Dona Paula Goa, 403 004, India;2. Department of Environmental Microbiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University, 87-100, Toruń, Poland |
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| Abstract: | We investigated CO photoproduction from intact leaves of rice (Oryza sativa L.) and maize (Zea mays L.) by laboratory experiments. CO photoproduction showed positive correlation with light intensity and was positively dependent on oxygen concentration. The average CO photoproduction was 2.6±0.3×1010 molecules cm−2 s−1 from rice leaves and 2.2±0.1×1010 molecules cm−2 s−1 from maize leaves (n=5) at a radiation intensity of 49 mW cm−2. CO photoproduction from senescent rice leaves was 9 times greater (25.7±1.5×1010 molecules cm−2 s−1, n=2) at the same radiation intensity than from live leaves, and responded slowly to changes in oxygen concentration and light intensity. CO photoproduction showed no correlation with CO2 concentration or humidity. This indicates that CO photoproduction in leaves is not directly controlled by carbon metabolism or stomatal conductance. The lack of dependence on stomatal conductance leads to the conclusion that the diffusion of CO from inside the leaves to the atmosphere is not a controlling factor for CO photoproduction from rice and maize leaves. |
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