Fig. 1.

Characterization of yl3 and the wild type. a Phenotype of yl3 and WT at 80 days after sowing. Bar = 20 cm; b Photosynthetic pigment contents in WT and yl3 at the tillering stage (means ± SD, n = 3); c. Net photosynthetic rate (Pn) of WT and yl3 (means ± SD, n = 3); d–g Chloroplast ultrastructure of flag leaves in WT (d, e) and yl3 (f, g). Ch, chloroplast; OG, osmiophilic granule; SG, starch granule; Gt, grana thylakoid; h The comparison of internode between WT and yl3; i Internode length of WT and yl3 at the mature stage (means ± SD, n = 3); j, k. Longitudinal section of the uppermost internode of WT (j) and yl3 (k), Bar = 100 μm; l Internode cell length of WT and yl3 (means ± SD, n = 10). *P < 0.05, **P < 0.01 by Student’s t test