Tocochromanol biosynthesis pathways and related gene expression levels during early fruit development. Values are showed as means ± SD (n = 3). HPP, 4-hydroxyphenylpyruvate; HGA, homogentisic acid; HPT, homogentisate phytyltransferase; HST, homogentisate solanesyl transferase; HPPD, 4-hydroxyphenyl-pruvate dioxygenase; MPBQ-MT, 2-methyl-6-phytylbenzoquinol methyltransferase; TMT, tocopherol methyltransferase; TC, tocopherol cyclase. MPBQ, 2-methyl-6-phytyl-1,4-benzoquinol; DMPBQ, 2,3-dimethyl-5-phytylbenzoquinol; MEP, methylerythritol phosphate. PDP, phytyl diphosphate; GGDP, geranylgeranyl diphosphate; SPP, solanesyl diphosphate.