Figure 2

Activity of sucrose metabolizing enzymes in leaf (a–d) and middle internode (maturing, (e–h)) of sugarcane plants at five and 32 days after ethephon (blue), mock (black), or AVG (red) application (DAA). The enzymes were involved in sucrose synthesis (μmol sucrose g⁻¹ fresh weight min⁻¹): sucrose-phosphate synthase (SPS) (a,e) and sucrose synthase (SuSy, evaluated only at the synthesis direction) (b,f); and sucrose degradation (μmol glucose g⁻¹ fresh weight min⁻¹): soluble acid invertase (SAI) (c,g) and neutral invertase (NI) (d,h). Each point represents the average of four replicates (individual plants), including the standard error of the mean (SEM). The asterisks denote significant differences between means of growth regulators and mock treatment inferred by one- or two-way ANOVA (F values for chemical and chemical versus time point interaction were shown) followed by LSD test (p-value < 0.05 or 0.01*). ^n.s. means not statistically significant.