Figure 6From: Xylem sap collection and extraction methodologies to determine in vivo concentrations of ABA and its bound forms by gas chromatography-mass spectrometry (GC-MS)Concentrations of ABA precursors, ABA and ABA-GE and metabolites in sap collected from detached leaves (a), the petiole stub of otherwise intact tomato plants (b) and the root system (c). Note the change of y-axis scale in (a). Data are means ± SE of 2-5 replicates, with * indicating that concentrations were significantly (P < 0.05) different from other values in each panel. L indicates that samples were lost during the extraction process.Back to article page