title: Hexavalent chromium induces gametogenesis in the freshwater alga Scenedesmus acutus.
abstract: The aggregates formed by Scenedesmus acutus cultivated in the presence of 1 mg/liter Cr(VI) persist even after 7 days of treatment. They were examined by fluorescence and electron microscopy and were found to be an early stage of sexual reproduction. They consist of four small cells deprived of a true cell wall and enclosed in a common envelope. When the envelope breaks up they are released in the culture medium as biflagellated mobile cells. These cells have been identified as gametes.
authors.affiliation: Department of Evolutive Biology, University of Parma, Italy.
authors.forename: M G
authors.initials: MG
authors.lastname: Corradi
authors.forename: G
authors.initials: G
authors.lastname: Gorbi
authors.forename: M
authors.initials: M
authors.lastname: Bassi
mesh_terms: D000460:Chlorophyta / Q000187:drug effects* / Q000502:physiology / Q000648:ultrastructure; D002857:Chromium / Q000494:pharmacology*; D005618:Fresh Water; D005718:Gametogenesis; D008854:Microscopy, Electron; D008856:Microscopy, Fluorescence
chemical_list: D002857:Chromium