Starch accumulation in Acetabularia mediterranea after X-irradiation

Lüttke, Angela; Bonotto, S.

doi:10.1016/0098-8472(82)90021-1

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1989

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“…In Acetabularia, a storage of intracellular material in the apical region, when cells were submitted to massive X and gamma irradiation, 20 and growth inhibited have been observed. Same effects were noted after exposure to higher concentrations of Cd(>l/jg L" 1 ).…”

Section: Discussionmentioning

confidence: 97%

Response of the unicellular giant algaAcetabularia Acetabulumto cadmium toxicity and accumulation∗

Karez

Bonotto²,

Puiseux‐Dao

1989

Toxicological & Environmental Chemistry

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Accumulation of cadmium by the unicellular marine alga Acetabularia acetabulum (=A. mediterranea) was studied by using the radioactive isotope 109 Cd. Column chromatography (Sephacryl S-200) of labelled extracts showed that after a short incubation (1-2 h) 109 Cd was eluted at the position characteristic for ionic cadmium and for low molecular weight compounds. However, after a longer incubation (one week or more), 109 Cd 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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Section: Discussionmentioning

confidence: 97%