Abstract
Recently it is reported that negative regulars play an important role on the regulation of gene expression in plants. In addition, we lately showed that, in the transgenic plants that express the chimeric repressor, the expression of group of genes, which are involved in the phenotype induced by the chimeric repressor, are upregulated, such as shown in TCPs. These suggest that plant genome contains a number of negative regulators and those factors control various biological function and maintenance of homeostasis via the regulation of the gene expression antagonistically with positive regulators. Negative regulation includes transcriptional suppression by a repressor, posttranscriptional regulation by miRNAs, active protein degradation and chromation modification. However, the mechanisms of regulation of the negative regulators or their function has not been fully characterized. In this session, we introduce negative regulation in leaf and floral stem cell development, floral patterning, response to salt stress, gibberellin signaling and Circadian Rhythm. We discuss functional role of the negative regulators involved in the regulation of these activities.
