Uptake of Manganese Ion by Chorella regularis

Abstract

The uptake of manganese by Chlorella regularis was examined. The amounts of man-ganese taken up by the living Chlorella cells rapidly increased in the first 1 hr after supplying manganese ion and then the rate of increase became slower. The amounts of manganese taken up by Chlorella cells increased with increment of manganese concentration. The rapid uptake of manganese by the living Chlorella cells during the first 1 hr was affected by pH of the solution or the co-existence of divalent cation, and was not so affected by temperature, light, and treatment with metabolic inhibitors. The ratio of manganese eluted with EDTA solution to manganese taken up by the living Chlorella cells decreased with the passage of time. These results suggested that the adsorption on the cell surface was the greater part during the first 1 hr but the ratio of uptake into the inner space of the cells increased with the nassaee of time.