Abstract
Respiration, uptake of [14C]glucose, and efflux of potassium and labelled metabolites from Mucor strictus at 0°, 10° and 25 °C were studied. Oxygen consumption and glucose uptake were most rapid at 25° indicating that these processes were not rapidly inactivated at a temperature which precludes growth. Efflux of organic metabolites and potassium was greatest at 25°, loss of potassium particularly being much higher at 25° than at 0° or 10°. At 0°, efflux of potassium from mesophilic Mucor species was greater than that from M. strictus, but this situation was reversed at 25°. These findings are discussed in relation to the physiological determinants of psychrophily in M. strictus.
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