Complementation of the morphological defects in the orrm5 mutants. orrm5-3+/+, wild-type siblings of orrm5-3 mutants. orrm5-3–/–, orrm5-3 homozygous mutants; 35S-ORRM5, mutant plants transformed with the coding sequence of ORRM5 under a 35S promoter; 35S-nORRM5; mutant plants transformed with the N-terminal RRM of ORRM5 under a 35S promoter. (A) Plant growth phenotype of plants grown at 14 h of light per day for 34 and 38 d. (B) Fresh weight of plants grown at 14 h of light per day for 34 and 38 d (n=4). (C) Measurement of flowering-related traits in the orrm5 mutants, wild-type plants and the transgenic lines expressing ORRM5 or nORRM5. Days taken for plants to reach these developmental stages (upper panel). 1st bud, days until visible flower buds in the center of the rosette; stem 1 cm, days until inflorescence stem reached 1 cm in height; 1st flower, days until first open flower. The fresh weight (middle panel) and the number of total leaves (lower panel) of plants at the opening of the first flower. Student’s t-test: *P<0.05, **P<0.01 in comparison with orrm5-3–/–, n=15. In (B, C) values represent mean±SD.