Fig. 3
From: ABA-mediated responses to water deficit separate grapevine genotypes by their genetic background
Relationships between water potential and concentration of ABA, PA, DPA in root and shoot xylem sap. ABA (a, b), phaseic acid (c, d) and dihydroxyphaseic acid (d, e) in root (a, c & e) and shoot (b, d & f) xylem sap during a four day water-deficit treatment in nine grapevine genotypes (key to symbols as shown for Fig. 1c) (n = 12). The dashed line shows the global linear regression for all nine genotypes, solid lines show those genotypes with a significantly different relationship from the global linear regression (Fischer-Snedecor test; p < 0.05). The slopes of the different regressions estimate the accumulation plasticity of the various genotypes for the different compounds. Comparisons between the slopes of general regressions obtained for shoot and root xylem sap were made using a Fischer-Snedecor-test (ABA: F = 1.76, p < 0.05; PA: F = 37.7, p < 0.001: DPA: F = 3.57, p < 0.05)