Responses of evergreen and deciduous Quercus species to enhanced ozone levels.
Plants of one evergreen oak (Quercus ilex) 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.
Calatayud
Vicent
V
Instituto Universitario CEAM-UMH, Charles R. Darwin 14, Parc Tecnològic, 46980 Paterna, Valencia, Spain. Electronic address: calatayud_viclor@gva.es.
Cerveró
Júlia
J
Instituto Universitario CEAM-UMH, Charles R. Darwin 14, Parc Tecnològic, 46980 Paterna, Valencia, Spain.
Calvo
Esperanza
E
Instituto Universitario CEAM-UMH, Charles R. Darwin 14, Parc Tecnològic, 46980 Paterna, Valencia, Spain.
García-Breijo
Francisco-José
FJ
Laboratorio de Anatomía e Histología Vegetal "Julio Iranzo", Jardín Botánico, Universitat de València, c/Quart 80, 46008 Valencia, Spain; Departamento de Ecosistemas Agroforestales, Escuela Técnica Superior del Medio Rural y Enología, Universidad Politécnica de Valencia, Avda. Blasco Ibáñez 21, 46010 Valencia, Spain.
Reig-Armiñana
José
J
Departamento de Ecosistemas Agroforestales, Escuela Técnica Superior del Medio Rural y Enología, Universidad Politécnica de Valencia, Avda. Blasco Ibáñez 21, 46010 Valencia, Spain.
Sanz
María José
MJ
Instituto Universitario CEAM-UMH, Charles R. Darwin 14, Parc Tecnològic, 46980 Paterna, Valencia, Spain.
D002734:Chlorophyll / Q000378:metabolism; D010126:Ozone / Q000633:toxicity*; D010788:Photosynthesis / Q000187:drug effects; D018515:Plant Leaves / Q000187:drug effects; D029963:Quercus / Q000187:drug effects*
D002734:Chlorophyll; D010126:Ozone