Venn diagrams showing overlap between genes differentially regulated by water stress, nematode stress, or the two in combination. Genes up- and down-regulated in roots (A and B, respectively) and leaves (C and D, respectively) are shown separately. Genes are shown whose expression levels differed significantly from control arrays where P < 0.05. Overlapping sections represent genes that were up- or down-regulated by more than one stress treatment. Data shown represent three biological replicates.