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Fig. 4


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Effect of pure MC-LR (a) and two cyanobacterial extracts Pa-A (b) and Pa-B (c) on development of root system of S. polyrhiza. Data are expressed as means ± SE, n = 5. Different uppercase letters (A, B) indicate statistically significant differences between number of roots of 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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