Negative regulation of components in cytokinin signaling by OsMADS1. A, Fold increase in the normalized transcript levels for two cytokinin biosynthetic genes (LOG and AK061341), four A-type response regulators (OsRR1, OsRR2, OsRR4, and OsRR9), and two B-type response regulators (OsRR16 and OsRR18) in OsMADS1 knockdown panicles versus wild-type panicles. The data from RT-qPCR are compared with those from microarray analysis. B, Transcript levels for OsRR1 and OsRR9 in wild-type (WT) and PUbi:OsMADS1-ΔGR; P35S:OsMADS1amiR plants treated with dexamethasone and cycloheximide individually and those given both chemicals compared with levels in mock-treated plants.