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Journal of Experimental Biology 36,583-589 (1959)
Published by Company of Biologists 1959

The Effect of Anaerobic Conditions on Two Heterotrich Ciliate Protozoa from Papyrus Swamps

L. C. BEADLE 1 and J. R. NILSSON 2

1 Department of Zoology, Makerere University College Kampala, Uganda
2 Department of Zoology, Makerere University College Kampala, Uganda; Carlsberg Laboratory, Copenhagen

1. Under conditions of decreasing oxygen concentration in sealed bottles of swamp water Bursaria sp. always died as soon as the oxygen was exhausted, but Blepharisma undulans invariably survived 1-3 days of anaerobic conditions.

2. Simultaneous measurements of oxygen, pH and oxidation-reduction potential suggested that the oxygen concentration is the most important factor for survival.

3. The red pigment of B. undulans plays no part in the resistance to low oxygen concentration.

4. It is suggested as a hypothesis that B. undulans can live without oxygen until it has exhausted its reserves of carbohydrate, which can only be renewed in presence of oxygen.

Submitted on April 3, 1959






© The Company of Biologists Ltd 1959