Enzymes involved in S-adenosylmethionine metabolism and differential expression of the corresponding genes in Cx and Ox. Transcript levels were analyzed in samples from four adult trees (T1-08, T2-08, T3-08, T4-08 in Fig. 2) after two months of artificial bending of stems, and the Cx/Ox fold change in each tree as determined by qRT-PCR is represented in four squares for every gene by a red color scale. Numerical values of fold change represented by the color scale are shown at the bottom right. GDC: glycine decarboxylase complex; mSHMT: mitochondrial serine hydroxymethyltransferase; cSHMT: cytosolic serine hydroxymethyltransferase; MS: methionine synthase; MTHFR: methylenetetrahydrofolate reductase; SAMS: S-adenosylmethionine synthase; COMT: caffeate O-methyltransferase; CCoAOMT: caffeoyl-CoA-O-methyltransferase; SAHH: S-adenosylhomocysteine hydrolase; HCT: hydroxycinnamoyl-CoA:shikimate hydroxycinnamoyl transferase; PHGDH: 3-phosphoglycerate dehydrogenase; PSAT: 3-phosphoserine aminotransferase; PSP: 3-phosphoserine phosphatase; NADH GOGAT: NADH-dependent glutamate synthase; GS1b: glutamine synthetase 1b; THF: tetrahydrofolate; HCy: homocysteine; SAHcy: S-adenosylhomocysteine; 3PGA: 3-phosphoglycerate; 3PHP: 3-phosphohydroxypyruvate; 3PSer: 3-phosphoserine.