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Effect of Storage on the Rate of Incorporation of Uridine into Ribonucleic Acid by Germinating Uredospores. L. Ramakrishnan, Boyce Thompson Institute, Yonkers, New York 10701; R. C. Staples, Boyce Thompson Institute, Yonkers, New York 10701. Phytopathology 61:244-245. DOI: 10.1094/Phyto-61-244.

Uredospores of the bean rust fungus virtually lost their capacity to incorporate exogenous uridine into ribonucleic acid during germination when the spores had been stored longer than 4 days in the refrigerator. The decline in uridine incorporation is not related to infectivity of the spores or to their capacity to germinate or differentiate.

Additional keywords: Density gradient analysis, Uromyces phaseoli.