Genetic control of responses to interacting tropospheric ozone and CO2 in Populus tremuloides
| Autor: | Richard E. Dickson, J. G. Isebrands, Don E. Riemenschneider, Y.P. Sheng, Gopi K. Podila, David F. Karnosky, Z. Gagnon, P. Pechter, Aruna S. Akkapeddi, M. D. Coleman |
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| Rok vydání: | 1998 |
| Předmět: |
Environmental Engineering
biology Health Toxicology and Mutagenesis Public Health Environmental and Occupational Health Clone (cell biology) Fumigation Plant physiology Growing season General Medicine General Chemistry biology.organism_classification Pollution Enzyme assay chemistry.chemical_compound chemistry Salicaceae Botany biology.protein Environmental Chemistry Phytotoxicity Tropospheric ozone |
| Zdroj: | Chemosphere. 36:807-812 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/s0045-6535(97)10128-x |
| Popis: | We exposed trembling aspen (Populus tremuK&s Michx.) clones differing in tropospheric ozone (O$ tolerance in various opentop chamber studies for rhree growing seasons, and examined the effects of 03, COz, and O3 + CO2 on growth and physiological processes. Ozone in the range of 80 ppm hr (Sum 00) per growing season decreased height, diameter, and stem and leaf biomass slightly in a tolerant clone but severely in a sensitive clone. Elevated CO2 (150 ppm over ambient) did not compensate for the O3 effects. Antioxidant enzyme analysis showed elevated SOD levels in the tolerant clone but not in the sensitive clone following O3 exposure. Northern blot analysis indicated that the chloroplastic and cytosolic CwZn SOD’s were significantly increased in response to O3 in the tolerant but not the sensitive clone. Currently, we are conducting molecular analysis to determine the functional significance of SOD’s in regulaling O3 tolerance in aspen. 0 1997 Elsevier |
| Databáze: | OpenAIRE |
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