Abstract
P. vulgaris L. plants were supplied through the root with [8-14C]benzylaminopurine ([14C]BA). Collections of root, apex and leaves were made 8 and 48 h after labeling; ethanolic extracts of tissues were purified and subjected to TLC on silica gel and/or cellulose powder. From [14C]BA at least 2 different metabolites originate, the BA riboside and ribotide. The balance among [14C]BA, the riboside and the ribotide changed in time. The [14C]BA riboside was detected as the only labeled compound in the xylem sap collected from the stem. The biological function of BA riboside and ribotide is discussed.