Maize plants (var. Ganga Hybrid 1) were treated with 0, 0.5x19-soM, 0.5x 10-,1"M. 0.5x10_-10M concentrations of simazi ne. Treated plants exh ioited higher level-of chlorophyll auxin, DNA, RNA and protein and a decreased activity of proxidas. Impact of increased level of auxin in simazine treated plants on nucleic acid and protein synthesis has been discussed.