Foliage type specific susceptibility to ozone in Picea abies,Pinus cembra and Larix decidua at treeline: A synthesis |
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| Institution: | 1. Unit of Alpine Timberline Ecophysiology, Federal Research and Training Centre for Forests, Natural Hazards and Landscape, Rennweg 1, A-6020 Innsbruck, Austria;2. Institute of Plant Physiology, Karl-Franzens University Graz, Schubertstraße 51, A-8010 Graz, Austria;3. Department of Forest and Ecosystem Science, Melbourne School of Land and Environment, The University of Melbourne, Water Street, Creswick, Vic. 3363, Australia;4. Ecophysiology of Plants, Department of Ecology, Technische Universität München, Life Science Center Weihenstephan, Hans-Carl-von-Carlowitz-Platz 2, D – 85354 Freising, Germany;1. Department of Invasion Ecology, Institute of Botany, The Czech Academy of Sciences, CZ-252 43 Pr?honice, Czech Republic;2. Department of Ecology, Faculty of Science, Charles University in Prague, CZ-128 44 Vini?ná 7, Prague, Czech Republic;3. Department of Botany, Faculty of Science, Charles University in Prague, CZ-128 01 Benátská 2, Prague, Czech Republic;1. Department of Genetics, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska Str. 89, 61-614 Poznań, Poland;2. Department of Systematic Zoology, Faculty of Biology, Adam Mickiewicz University in Poznań, Umultowska Str. 89, 61-614 Poznań, Poland;1. Department of Ecology, Institute of Botany, Polish Academy of Sciences, Lubicz Str. 46, PL-31-512 Kraków, Poland;2. Institute of Zoology, Poznań University of Life Sciences, Wojska Polskiego Str. 71C, PL-60-625 Poznań, Poland;1. Polish Academy of Sciences, Institute of Dendrology, Parkowa 5, 62-035 Kórnik, Poland;2. Poznań University of Life Sciences, Department of Game Management and Forest Protection, Wojska Polskiego 71c, 60-625 Poznań, Poland;3. Poznań University of Life Sciences, Faculty of Forestry, Wojska Polskiego 28, 60-637 Poznań, Poland;4. Adam Mickiewicz University, Faculty of Biology, Department of Plant Ecology and Environmental Protection, Umultowska 89, 61-614 Poznań, Poland;5. Warsaw University of Life Sciences, Forest Experimental Station in Rogów, Rogów Arboretum, Akademicka 20, 95-063 Rogów, Poland;1. Department of Ecology & Evolutionary Biology, University of Michigan, 830 N. University Ave, Ann Arbor, MI 48109, USA;2. Ecological Research Institute, 676 Lapla Rd., Kingston, NY 12401, USA;3. School of Natural Resources & Environment, University of Michigan, 440 Church St., Ann Arbor, MI 48109, USA;4. Department of Mathematics and Sciences, Our Lady of the Lake University, San Antonio, TX 78207, USA |
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| Abstract: | Cumulative ozone uptake (COU, mmol m?2) and O3 flux (FO3, nmol m?2 s?1) were related to physiological, morphological and biochemical characteristics of field-grown mature evergreen Norway spruce Picea abies (L.) Karst.], Cembran pine Pinus cembra L.], and deciduous European larch Larix decidua Mill.] trees at treeline. The threshold COU causing a statistically significant decline in photosynthetic capacity (Amax) ranged between 19.6 mmol m?2 in current-year needles of evergreen conifers and 22.0 6 mmol m?2 in short-shoot needles of deciduous L. decidua subjected to exposure periods of ≥84 and ≥43 days, respectively. The higher O3 sensitivity of deciduous L. decidua than of evergreen P abies and P. cembra was associated with differences in FO3 and specific leaf area (SLA), both being significantly higher in L. decidua. FO3 was 5.9 nmol m?2 s?1 in L. decidua and 2.7 nmol m?2 s?1 in evergreen conifers. Species-dependent differences were also related to detoxification capacity expressed through total surface area based concentrations of reduced ascorbate and α-tocopherol that both increased with SLA. Findings suggest that differences in O3 sensitivity between evergreen and deciduous conifers can be attributed to foliage type specific differences in SLA, the latter determining physiological and biochemical characteristics of the treeline conifers. |
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