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[Cytokinins]
1Faculty of Pharmaceutical Sciences, University of Tokyo, Japan.
Abstract:
Cytokinins which promote cell division and cell differentiation of plants are structurally classified into two groups: purine-type cytokinins and phenylurea-type cytokinins. Structural modification of the two types led a potent cytokinin, N-(2-chloro-4-pyridyl)-N'-phenylurea (forchlorfenuron). Structure-activity relationship was discussed. The mode of the two types of cytokinins was studied, and a putative receptor which is common to both types was detected using a highly-labelled synthetic cytokinin. Examples of horticultural application of the compound were illustrated.