Hexavalent Chromium Induces Gametogenesis in the Freshwater Alga Scenedesmus acutus

Hexavalent Chromium Induces Gametogenesis in the Freshwater Alga Scenedesmus acutus

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 tr...

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Veröffentlicht in:Ecotoxicology and environmental safety 1995-03, Vol.30 (2), p.106-110
Hauptverfasser: Corradi, M.G., Gorbi, G., Bassi, M.
Format: Artikel
Sprache:eng
Schlagworte:
Chlorophyta - drug effects
Chlorophyta - physiology
Chlorophyta - ultrastructure
Chromium - pharmacology
Fresh Water
Freshwater
Gametogenesis
Microscopy, Electron
Microscopy, Fluorescence
Scenedesmus acutus
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Zusammenfassung: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.
ISSN:0147-6513
1090-2414
DOI:10.1006/eesa.1995.1012