Abstract
Arabidopsis TCP3 is a member of TCP transcription factors and regulates morphogenesis of shoot lateral organs. We reported that expression of TCP3SRDX, in which TCP3 was fused with the EAR-repression domain (SRDX), induced ectopic expression of boundary-specific genes that include CUP-SHAPED COTYLEDON (CUC) genes in association with reduction of accumulation of miR164, which cleaves CUC transcripts, whereas mTCP3, in which the target site of miR-JAW was mutated, suppressed the expression of CUC genes. To analyze functional interaction of TCP3 with other genes, we examine a transcriptional network of genes under the control of TCP3. Our microarray analyses showed that transcription of many genes is changed in response to transient induction of mTCP3 and TCP3SRDX genes, respectively. Further analysis of these profiles of gene expression would clarify the transcriptional network in the downstream of TCP3 which leads to the negative regulation of CUC genes in shoot lateral organs.
