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SUMMARY
The effect of various tricarboxylic acid cycle intermediates, amino acids, and carbohydrates on the respiration of Rhizopus oryzae was studied by using conventional manometric techniques.
All of the tricarboxylic acid cycle intermediates stimulated the oxygen uptake of the fungus.
The L-forms of the amino acids produced more oxygen uptake than either the D- or the DL-forms and the greatest amount of activity was produced by L-proline.
All of the carbohydrates tested stimulated the oxygen uptake of the fungus with the exception of L-arabinose and sucrose. Mannose produced the highest activity.