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Response of the unicellular giant alga Acetabularia acetabulum to cadmium toxicity and accumulation
Karez, C.S.; Bonotto, S.; Puiseux-Dao, S. (1989). Response of the unicellular giant alga Acetabularia acetabulum to cadmium toxicity and accumulation. Toxicol. Environ. Chem. 19(3-4): 223-232. dx.doi.org/10.1080/02772248909357350
In: Toxicological and environmental chemistry. Gordon and Breach Science Publishers: New York. ISSN 0277-2248, more
Peer reviewed article  

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Keyword
    Marine
Author keywords
    Cadmium uptake, intracellular speciation, toxicity, morphogenesis, Acetabularia , marine algae, bioaccumulation, cellular transport, cytolysis, chromatography

Authors  Top 
  • Karez, C.S.
  • Bonotto, S.
  • Puiseux-Dao, S.

Abstract
    Accumulation of cadmium by the unicellular marine alga Acetabularia acetabulum (=A. mediterranea) was studied by using the radioactive isotope 109Cd. Column chromatography (Sephacryl S‐200) of labelled extracts showed that after a short incubation (1–2 h) 109Cd was eluted at the position characteristic for ionic cadmium and for low molecular weight compounds. However, after a longer incubation (one week or more), 109Cd was present also in high molecular weight molecules.Cadmium is very toxic to Acetabularia: cell growth and cap formation were reduced at concentration as low as 1 μg L‐1. For concentrations higher than 0.1 mg L‐1, various morphological anomalies appeared, such as formation of short and thick stalks and condensation of cytoplasm in apical or basal parts, eventually followed by cytolysis.

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