Figure 2.

Comparison of ribosome-inactivating proteins (RIP) activity in whole Fragaria × ananassa plants during quiescence (white), flowering (grey), and fructification (black). The total activity was normalized to the entire basic protein fraction (mg). The protein concentration in the tested tissues ranged from 43.9 to 222.6 mg (quiescence), from 39.1 to 332.3 mg (flowering), and from 39.9 to 754.5 mg (fructification). The IC₅₀ values ranged from 5 to 150 μg/mL. The results are the means ± standard deviation of three experiments, each performed in duplicate. The statistical analysis was performed using Student’s t test (confidence range 95%). The asterisks indicate statistical significance for the fructification period versus the quiescence and flowering periods (p < 0.05).