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Some Aspects of the Respiratory Metabolism of Caenorhabditis Briggsae (Rhabditidae)

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image of Nematologica
For more content, see Nematology.

A method is described for the production of large numbers of C. briggsae free from culture medium. Various aspects of the respiratory metabolism of these worms have been examined using a variety of techniques. The respiration of the worms increased rapidly as the amount of oxygen in the gaseous phase of the incubation vessels increased, until a level of 5% O2 was attained. After this no increase was observed. Cyanide in high concentrations and carbon monoxide inhibited respiration. The effect due to carbon monoxide was reduced in daylight. These substances also inhibited the development and reproduction of the worms, but the effect due to carbon monoxide was reversible. Preparations of worms subjected to sonic disruption utilised radioactive succinate, converting it to fumaric, malic, lactic and aspartic acids and to alanine. Spectrophotometric studies of washed homogenates of C. briggsae suggested the presence of pigments similar to a cytochrome b present in parasitic helminths, cytochrome c and traces of cytochrome a. Flavoprotein was detected in the washings. The implications of these results are discussed.

Affiliations: 1: Department of Zoology, The Australian National University, Canberra, A.C.T., Australia


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