title: Uptake and acute toxicity of cerium in the lichen Xanthoria parietina.
abstract: Environmental cerium (Ce) levels are likely to increase in the near future and monitoring of its biological effects will therefore be necessary. The aim of this study was to test if treatment of the lichen Xanthoria parietina with Ce-containing solutions (0.1mM, 1mM, 10mM and 100mM) causes Ce bioaccumulation (both extra- and intra-cellularly) as well as physiological (sample viability, membrane lipids peroxidation, photosynthetic performance, water-soluble proteins content) and ultrastructural alterations. The results showed that treatment with Ce solutions induces Ce bioaccumulation, both extra-cellularly and intra-cellularly, which in turn causes an acute toxicity, evident as decreased sample viability, marked decrease in the photosynthetic performance and important changes in the ultrastructure.
authors.affiliation: University of Siena, Siena, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Paoli
authors.affiliation: University of Siena, Siena, Italy.
authors.forename: E
authors.initials: E
authors.lastname: Fiorini
authors.affiliation: University of Lisbon, Lisbon, Portugal.
authors.forename: S
authors.initials: S
authors.lastname: Munzi
authors.affiliation: University of Naples, Naples, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Sorbo
authors.affiliation: University of Naples, Naples, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Basile
authors.affiliation: University of Siena, Siena, Italy. Electronic address: stefano.loppi@unisi.it.
authors.forename: S
authors.initials: S
authors.lastname: Loppi
mesh_terms: D001203:Ascomycota / Q000187:drug effects* / Q000378:metabolism*; D002563:Cerium / Q000378:metabolism* / Q000633:toxicity*; D004784:Environmental Monitoring; D008011:Lichens / Q000187:drug effects* / Q000378:metabolism*; D050296:Microbial Viability / Q000187:drug effects; D010788:Photosynthesis / Q000187:drug effects
chemical_list: D002563:Cerium
keywords: Bioaccumulation; Biomonitoring; Physiology; Traffic-related elements; Ultrastructure