N. G. VASSILEV and G. N. VASSILEV
Bulgarian Academy of Sciences, Institute of Organic Chemistry, BG-1113 Sofia, Bulgaria
VASSILEV, N. G. and G. N. VASSILEV, 2003. Synthesis and cytokinin activity of some adducts of the diethyl esters of benzylphosphonic acid with different ketones. Bulg. J. Agric. Sci., 9: 265–266
New group of biologically active substances with high cytokinin activity is discovered. The cytokinin activity is determined by the Amaranthus-bioassay and by the bioassay of tobacco callus tissue. Our investigations on the synthesis and biological characterization of new organophosphorus compounds will continue with regard to the discovery of new growth regulators with cytokinin activity.