Figure 3
SAR induction following Phytophthora sojae (avirulent) infection in soybean. Colony forming units (cfu) of P. syringae pv. glycinea (Psg) per leaf in the samples inoculated with Psg 9, 13, 17 and 21 days following exposure of wounded hypocotyls to agar pieces containing either no P. sojae mycelia (solid gray) or P. sojae mycelia (solid black) are shown. Ten microliter droplets of either bacterial cell suspensions (107 cells/ml) or 10 mM magnesium chloride were used to inoculate the youngest trifoliate. The study was conducted with three biological replications. Bars without a common letter on the top are statistically different (Fisher's LSD test, P = 0.05). Standard errors are represented by error bars.