The microarray technique is a powerful tool for otaining an overview of plant hormone actions using inducible genes as molecular markers. We have already studied comprehensive transcript profiles of auxin-regulated and brassinosteroid-regulated genes in arabidopsis. In this presentation, microarray analyses of other phytohormone (cytokinin, gibberellin, abscisic acid, jasmonic acid and ethylene and plant growth regulator including biosynthesis inhibitor are presented. Comparison of phytohormone's actions between triazol compound's actions, indicating the specificity of Brz220 for brassinosteroid's action.
