EFFECT OF TEMPERATURE ON TRANSLOCATION OF PHOSPHORUS BY RHIZOPUS STOLONIFER

The effect of temperature on the rate of phosphorus translocation, on the uptake and metaholism of phosphate and on respiratory rate of Rhizopus stolonifer, has been studied. Over the temperature range 20–30° C the rate of phosphorus translocation is greatest at 20° C and lowest at 30° C. The rate of oxygen uptake is greatest at 25° C. The rate of phosphate uptake does not vary significantly over this temperature range, but the proportion of ahsorhed phosphate present as orthophosphate bears a direct relationship to the rate of phosphorus translocation. These results are consistent with the view that phosphorus may be translocated in the form of orthophosphate. Copyright © 1969, Wiley Blackwell. All rights reserved