title: Effects of ozone on stomatal responses to environmental parameters (blue light, red light, CO2 and vapour pressure deficit) in three Populus deltoides × Populus nigra genotypes.
abstract: The effect of ozone (O(3)) on stomatal regulation was studied in three Euramerican poplar genotypes (Populus deltoides × Populus nigra: Carpaccio, Cima and Robusta). The impact of O(3) on stomatal conductance responses to variations in blue light, red light, CO(2) concentration and vapour pressure deficit (VPD) was studied. Upon O(3) exposure, a sluggish response of stomatal movements was observed, characterized by slower reactions to increases in blue light intensity, CO(2) concentration and VPD, and lower amplitude of the response to variations in light intensity. That sluggish response should be taken into account in stomatal conductance models for phytotoxic ozone dose (POD(Y)) calculations. The speed of the response to variations in environmental parameters appears as a determining factor of genotype-related sensitivity.
authors.affiliation: INRA, UMR 1137, Ecologie et Ecophysiologie Forestières, Champenoux F-54280, France. jdumont@nancy.inra.fr
authors.forename: Jennifer
authors.initials: J
authors.lastname: Dumont
authors.forename: Fabien
authors.initials: F
authors.lastname: Spicher
authors.forename: Pierre
authors.initials: P
authors.lastname: Montpied
authors.forename: Pierre
authors.initials: P
authors.lastname: Dizengremel
authors.forename: Yves
authors.initials: Y
authors.lastname: Jolivet
authors.forename: Didier
authors.initials: D
authors.lastname: Le Thiec
mesh_terms: D000393:Air Pollutants / Q000633:toxicity*; D002245:Carbon Dioxide / Q000378:metabolism*; D005838:Genotype; D008027:Light; D010126:Ozone / Q000633:toxicity*; D054046:Plant Stomata / Q000187:drug effects* / Q000502:physiology; D032107:Populus / Q000187:drug effects / Q000235:genetics / Q000502:physiology*; D055548:Vapor Pressure
chemical_list: D000393:Air Pollutants; D002245:Carbon Dioxide; D010126:Ozone