FIGURE 1.

Effect of tagatose on Phytophthora spp. growth. Phytophthora infestans (A) and P. cinnamomi (B) growth (mm) was assessed 4 and 10 days after incubation (DAI) on pea agar medium in the absence (white, Control) and presence of 5 (gray), or 10 g/L (black) tagatose. The radial growth was calculated as the average of the two perpendicular diameters of the colony, minus the plug diameter and the result divided by two. The Kruskal–Wallis test showed no significant differences between the two experimental repetitions (P > 0.05, 10 replicates per experiment) and data from the two experiments were pooled. Mean and standard error values of 20 replicates (dishes) from the two experiments are presented for each treatment. Different lowercase and uppercase letters indicate significant differences among treatments at 4 and 10 days after incubation (DAI) according to the Kruskal–Wallis test (P ≤ 0.05), respectively. Representative pictures of P. infestans (C) and P. cinnamomi (D) growth 4 DAI in the absence (Control) and presence of 5 g/L tagatose are shown.)