Fig. 5
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Chlorophyll a content in S. polyrhiza exposed for 96 h to pure MC-LR (a), cyanobacterial extracts Pa-A (b) and Pa-B (c). Data are expressed as means ± SE, n = 5. Different uppercase letters (A, B) indicate statistically significant differences between chlorophyll a content in S. polyrhiza exposed to different concentrations of MC-LR (a); different dilutions of the extracts Pa-A (b) and Pa-B (c) (ANOVA, Tukey's test, p < 0.05).
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