The effects of arsenate and arsenite on the growth and morphology of the marine unicellular algae Tetraselmis chui (Chlorophyta) and Hymenomonas carterae (Chrysophyta)
1978; Elsevier BV; Volume: 33; Issue: 2 Linguagem: Inglês
10.1016/0022-0981(78)90005-9
ISSN1879-1697
AutoresNestor R. Bottino, Robert D. Newman, Elenor R. Cox, R.A. Stockton, Michael A. Hoban, Ralph A. Zingaro, Kurt J. Irgolic,
Tópico(s)Fluoride Effects and Removal
ResumoThe marine phytoplanktonic algae, Tetraselmis chui Stein and Hymenomonas carterae (Braarud and Fagerland) Braarud, were grown in media containing various concentrations of arsenate or arsenite. The effects of arsenic on the algae varied with the oxidation state of the element, its concentration, and the degree of illumination. Arsenate affected mainly algal growth but also cell morphology, whereas arsenite caused only morphological changes. Studies on the incorporation of 74As-arsenate into cells grown in artificial sea water indicated that arsenate was incorporated and later partially released by both T. chui and H. carterae. Both arsenate influx and efflux seemed to be energy-dependent phenomena, because they varied with the degree of illumination. Differences between the rates of uptake and release of arsenic suggested that arsenate undergoes chemical changes after having been transported into the algal cells.
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