Fig. 1

Effect of different photoperiod treatments on flower time, soluble protein content and soluble sugar contents in C. oleifera ‘Huanshuo’ leaves. A Represent image of C. oleifera flower in SD, MD, LD conditions. B The number of C. oleifera flower in SD, MD, LD conditions. Soluble protein content (C) and soluble sugar content (D) of C. oleifera in SD, MD, LD conditions. a-g represent seedling stage (a), flower bud differentiation (b), budding (c), bud breaking (d), pre-flowering (e), initial flowering (f) and full blooming stage (g) respectively. The first bud bloom time of all treatments set as 1d. Significant differences are indicated: **P < 0.01, ***P < 0.001 (Tukey’s least significant difference test)