title: The impact of ambient ozone on mountain spruce forests in the Czech Republic as indicated by malondialdehyde.
abstract: Malondialdehyde (MDA), a product of lipid peroxidation and biomarker of oxidative stress, is measured over the long term in spruce Picea abies needles under real conditions in three Czech mountain border areas. The trends presented collate the MDA content in spruce needles with ambient ozone, temperature and precipitation as casual, and defoliation as a subsequent factor for the period 1994-2006. We have found the overall decreasing trends in MDA and defoliation. The highest MDA and defoliation are recorded in the Jizerske, the lowest in the Krusne hory Mts. Out of the examined variables the MDA is predicted best by mean temperature in vegetation season, median of O(3) concentrations and AOT40; these three variables account for 34% of MDA1 and 36% of MDA2 variability. Our hypothesis that higher ambient O(3) exposure results in higher MDA contents in P. abies needles under real conditions has not been approved.
authors.affiliation: Czech Hydrometeorological Institute, Na Sabatce 17, 143 06 Prague 4-Komorany, Czech Republic. hunova@chmi.cz
authors.forename: Iva
authors.initials: I
authors.lastname: Hůnová
authors.forename: Radek
authors.initials: R
authors.lastname: Novotný
authors.forename: Hana
authors.initials: H
authors.lastname: Uhlírová
authors.forename: Tomás
authors.initials: T
authors.lastname: Vráblík
authors.forename: Jan
authors.initials: J
authors.lastname: Horálek
authors.forename: Bohumír
authors.initials: B
authors.lastname: Lomský
authors.forename: Vít
authors.initials: V
authors.lastname: Srámek
mesh_terms: D018153:Czech Republic; D008315:Malondialdehyde / Q000378:metabolism*; D018384:Oxidative Stress / Q000502:physiology*; D010126:Ozone / Q000633:toxicity*; D028222:Picea / Q000187:drug effects / Q000378:metabolism*; D014197:Trees
chemical_list: D008315:Malondialdehyde; D010126:Ozone