Fig. 6

OsNAC103 regulates the plant architecture in rice. A, B Phenotype of tiller angles of OsNAC103-OE lines and osnac103 mutants in vegetative stage. B indicates the magnified figure in A. Bars = 5 cm. C–E Phenotype of the tiller base (TB) of OsNAC103-OE lines and osnac103 mutants in reproductive stage. Bar = 5 cm in C, Bars = 1 cm in D and E. F Tiller angles of OsNAC103-OE lines and osnac103 mutants. G Tiller number of OsNAC103-OE lines and osnac103 mutants. H Plant height of OsNAC103-OE lines and osnac103 mutants. Values are shown as means ± SD, n ≥ 20 individual plants. I Shoot gravitropism of OsNAC103-OE lines and osnac103 mutants grown under dark condition. Photos were taken at 96 h after rotation 90 degrees. Bar = 2 cm. g means the direction of gravity. J Dynamics of shoot gravitropism grown under dark condition. The shoot curvatures are measured in 12 h interval (n = 9–13). K–Q Expression analysis of genes associated with tiller angle and shoot gravitropism in OsNAC103-OE lines. RNAs were extracted from penultimate leaves of WT and OE lines at vegetative stage, and qRT-PCR was performed to analyze the relative expression levels of different genes. OE1, OE6 and OE9 are three independent lines with higher overexpression levels and extremely pleiotropic phenotypes. OE2 and OE7 are two independent OsNAC103-OE lines. CR2 and CR5 are two allelic mutants. Asterisks indicate statistically significant differences by Student’s t test (*P < 0.05; **P < 0.01)