FIGURE 2.

PR-1 gene transcript accumulation and BABA dose-dependent protection against Phytophthora infestans in potato leaves (B₀). (A) PR-1 gene transcript accumulation at 3 days after induction with BABA (left bars) and 24 h after inoculation of previously induced plants (right bars), (B) a time-dependent analysis of PR-1 gene expression in P. infestans-inoculated plants previously treated with 1 mM dose of BABA (in B₀ stage), (C) an index of disease development at 7 dpi in directly BABA-treated parents B₀, (D) a scale corresponding to the area of leaves covered with late blight and to trypan blue staining of P. infestans mycelium. ^∗Significantly different from control leaves, P < 0.05. Values represent means of data ±SD of at least three independent experiments, each with at least three biological replicates.