Figure 3.

Polyamine contents in flax seedlings after pathogenic strains of Fusarium culmorum and Fusarium oxysporum and the non-pathogenic strain of Fusarium oxysporum (Fo47) infection. Quantities of total polyamines, free polyamines, soluble-conjugated polyamines and bound (insoluble-conjugated) polyamines, including putrescine, spermidine, and spermine, in flax seedlings after 48 h of Fusarium infection are presented in comparison with the values for the control plants (C). The data were obtained from UPLC analysis and represent the mean ± SD from four independent measurements. The significance of the differences between the means was determined using Student's t-test (^*P < 0.05, ^**P < 0.01).