Journal
ENVIRONMENTAL POLLUTION
Volume 159, Issue 1, Pages 55-63Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.envpol.2010.09.024
Keywords
Ozone; Functional leaf traits; Stomatal conductance; Photosynthesis; Critical levels; Anatomy
Categories
Funding
- Generalitat Valenciana
- Ministerio de Medio Ambiente y Medio Rural y Maritimo
- ICP-Forests
- Conselleria de Medi Ambient, Aigua i Habitatge and Interreg III
- Fundacion Bancaja
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Plants of one evergreen oak (Quercus Hex) and three deciduous oaks (Q. faginea, with small leaves; Q pyrenaica and Q robur, with large leaves) were exposed both to filtered air and to enhanced ozone levels in Open-Top Chambers. Q. faginea and Q. pyrenaica were studied for the first time. Based on visible injury, gas exchange, chlorophyll content and biomass responses, Q. pyrenaica was the most sensitive species, and Q. ilex was the most tolerant, followed by Q. faginea. Functional leaf traits of the species were related to differences in sensitivity, while accumulated ozone flux via stomata (POD1.6) partly contributed to the observed differences. For risk assessment of Mediterranean vegetation, the diversity of responses detected in this study should be taken into account, applying appropriate critical levels. (C) 2010 Elsevier Ltd. All rights reserved.
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