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. 2019 Jun 18;180(4):1930–1946. doi: 10.1104/pp.19.00470

Figure 4.

Figure 4.

Activity of sugar metabolism enzymes during nectary maturation. A, SPS activity is induced during secretion. B, Acid (pH 4.8) invertase increases during secretion (P < 0.1), whereas neutral (pH 7) invertase activity stays constant throughout secretion. C, SuSy activity increases throughout secretion. D, Acid (pH 5.5) and neutral (pH 7.4) α-GALase assays show no change in activity throughout secretion. Error bars represent SE (n = 4, except for SuSy activity at −15 h, where n = 3). Columns that share a letter are not significantly different from one another ([Tukey post hoc test, P < 0.05 for (A), (C), and (D); P < 0.1 for (B)]. 4-NP, 4-nitrophenol.