Various signals can be involved in the transition from vegetative growth to reproductive growth in plant. Plant hormones play important roles in this process. To study the developmental mechanism of hormone-regulated regenerated inflorescence, we established a regeneration system of Arabidopsis inflorescence induced by cytokinin and auxin in vitro. In this regeneration system, pistil was used as explant to induce the formation of callus,and then the callus was transferred to another kind of media for...