Bioaccumulation and Toxicity of Lead in the Green AIga Spirogyra fluviatilis Hilse and Zygnema pectinatum (Zygnemataceae)

Authors: Saadet SAYGIDEĞER

Abstract: In this study, the bioaccumulation and toxicity of Iead investigated in freshwater algae, Spirogyra fluviatilis Hilse and Zygnema pectinatum (Vauch). In addition the effects of Iead on the amounts of chlorophyll, protein and carbohydrates investigated in Spirogyra fluviatilis Hilse and Zygnema pectinatum (Vauch). Spirogyra fluviatilis and Zygnema pectinatum was subjected to Iead concentrations of 0, 2, 20, 50, 100, 500 and 1000 ppm. The amounts of chlorophyll, protein and carbohydrate were hovewer significantly reduced at high concentrations. Our microscopic investigations showed that the cellular integrity began to be affected at the higher concentrationsthat 20 ppm (Zygnema pectinatum) and 50 ppm (Spirogyra tluviatilis), Lead uptake by Spirogyra tluviatilis and Zygnema pectinatum increased with increasing Iead concentration of test solution. The amount of dry-matter increased because of the bioaccumulation of Iead, There was Iittle difference in Iead accumulation between Spirogyra fluviatilis and Zygnema pectinatum, Lead uptake were identified with the most drammatic accumulation occuring in the first 20 min.

Keywords: Bioaccumulation, Toxicity, Lead, Spirogyra, Zygnema