Soluble Deoxyribosidic Compounds in Relation to Duplication of Deoxyribonucleic Acid

Abstract
Three periods of DNA synthesis occur in the lily anther just before meiosis, just prior to microspore mitosis, and during pollen maturation. The presence of deoxyribosidic material was determined at different stages, using the microbiological assay technique of Hoff-Jorgensen as modified by Schneider. Very high incidence of deoxy ribosides was found immediately preceding periods of DNA synthesis, as contrasted with other periods. This supports the inference that DNA is formed from soluble deoxyribosidic compounds.