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Ribosomal Activity in Uredospores Germinated on Membranes. Zohara Yaniv, Boyce Thompson Institute, Yonkers, New York 10701, U.S.A; Richard C. Staples, Boyce Thompson Institute, Yonkers, New York 10701, U.S.A. Phytopathology 64:1111-1114. Accepted for publication 14 March 1974. DOI: 10.1094/Phyto-64-1111.

Ribosomes from bean rust uredospores germinated on collodion membranes were about three times more active in assays for amino acid incorporation than ribosomes from spores germinated on water. Ribosomes from spores induced to differentiate by addition of oil to the membrane had a small additional increment of activity. All ribosomes were equally active with polyuridylic acid regardless of mode of germination. The increased activity of ribosomes from spores germinated on membranes is correlated with an increased formation of polyribosomes.