Figure 8

Growth, flowering, and polyamine levels as a function of concentration for spermine treatment (0, 0.5, 1, 2 and 2.5 means 0 mM, 0.5 mM, 1 mM, 2 mM and 2.5 mM exogenous spermine for different treatments. 90 days old plants were used for flower number count. Data are means of 3 replicates ± SE. Bars labeled with * and ** are significantly different at P < 0.05 and 0.01, respectively. 0 mM treatment as control for significance analysis). (a–c) phenotype of flowering in different exogenous spermine treatments; (d–i) putrescine, spermidine, spermine, total polyamines concentration, and the ratio of spermidine/polyamines and spermine/polyamines in different spermine concentration treatments, respectively.