Phytohormones, Rhizobium Mutants, and Nodulation in Legumes 1: V. Cytokinin Metabolism in Effective and Ineffective Pea Root Nodules

摘要

[3H]Zeatin riboside was supplied to intact pea (Pisum sativum) plants either onto the leaves or onto the root nodules. When applied directly to nodules, approximately 70% of recovered radioactivity remained in the nodules, approximately 15% was detected in the root system, and 15% was in the shoot. However, when supplied to the leaves, little 3H was transported, with approximately 0.05% of recovered radioactivity being found in the root system and nodules. On a fresh weight basis, nodules accumulated more 3H than the parent root. In both types of studies, metabolites with an intact zeatin moiety were detected in root nodules.