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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

Ref ID : 3896

William H. Yongue, Jr., Barbara L. Berrent, and John Cairns, Jr.: Survival of Euglena gracilis Exposed to Sublethal Temperature and Hexavalent Chromium. J.Protozool. 26(1):122-125, 1979

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At room temperature (~20 degrees C) the concentration of 1 mg/litter of chromium, as CrO3, and a 3-hr exposure were the conditions at which most Euglena gracilis survived. Euglena subjected to 31.5+/-0.5 degrees C for 1 hr, then cooled to room temperature and treated with Cr, was as sensitive to 0.001 mg/liter as to 10 mg/liter. When simultaneously subjected to 31.5+/-0.5 degrees C and Cr, survival of Euglena was <50% at concentrations down to 0.001 mg/liter by the end of 3 hr.