Figure 2

Metabolic network altered in the stalk cells under salt stress conditions. The signal intensity in picoPPESI negative ion mode mass spectra plotted against the time after treatment (h). Ascorbate (ASC)/dehydroascorbate (DHA) and glutathione (GSH)/oxidized glutathione (GSSG) ratios calculated are also shown. Cyan and red plots indicate control and salt stress treatment, respectively. Data are means ± SE for 8–32 stalk cells from 3 to 6 plants in each treatment. The p-value at the 0.1 and 0.05 probability levels indicated with * and **, determined using t-test. Hex: hexose; HexP: hexose phosphate; ATP: adenosine 5’-triphosphate; ADP: adenosine 5’-diphosphate; G3P: glycerol-3-phosphate; DHAP: dihydroxyacetone phosphate; GAP: glyceraldehyde 3-phosphate; PEP: phosphoenolpyruvate; α-KG: α- ketoglutarate; OAA: oxaloacetate; MDHA: monodehydroascorbic acid; PA: phosphatidic acid; DG: diacylglycerol; UDP: uridine 5’-diphosphate; MGDG: monogalactosyl diacylglycerol; DGDG: digalactosyl diacylglycerol; CTP: cytidine triphosphate; PPi: bisphosphate; CDP-DG: cytidine diphosphate diacylglycerol; PI: phosphatidylinositol; PIP: phosphatidylinositol monophosphate; PG: phosphatidylglycerol; CL: cardiolipin. Line graphs were created with Sigmaplot 13.0.