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Relative cyto kinin activity of 3 methyl substituted adenylate cyto kinins

Relative cyto kinin activity of 3 methyl substituted adenylate cyto kinins

Agricultural and Biological Chemistry 42(2): 487-490

Cytokinin activity was determined in tobacco callus bioassay on the basis of fresh weight yields. The replacement of a methyl group on the 3 position of 6-benzylaminopurine caused about 100-fold loss in activity in a concentration range of 0.01 .mu.M-1.0 .mu.M. 3-Methyl-2iP (6-(3-methyl-2-butenylamino)purine) was about as active as 2iP in a concentration range between 0.1 .mu.M-1.0 .mu.M. Substituents on the 3 position tend to decrease activity but the magnitude is different for different cytokinins.

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