Cytokinins are plant hormones that contribute to the regulation of a variety of
developmental processes including apical dominance flower and fruit
developmental leat senescence and seed germination numerous cytokinins
have been characterized in different plant species Differences among
Cytokinins are related predominantly to structural features including the side
Chain that is attached to an adenine moiety conjugation with sugars and
Phosphorylation these hormones bind to cell surface receptors and initiate a
Signal transduction cascade that leads to activation of genes involved in tissue
development Over the past decade many genes have been identified that
Attect cytokinin synthesis transport metabolism and their function in growth
regulation ln Arabidopsis it appears that a gene.family of over 20 members
Controls these processes This paper presents an overview of recent
experimental approaches and obtained results. on the genes and
Corresponding proteins involved in cytokinin biosynthesis modification
Degradation and signal transduction