Research advances in terpenoids biosynthesis pathway of tomatoes / 国际生物医学工程杂志

ABSTRACT

The metabolic activity of terpenoids not only have a grant effect on normal growth of tomato plants,but also have a great influence on the quality and colour of the fruits.Most terpenoids belong to the carotenoids,which are synthesized through terpenoid pathway.Three acety-CoAs are condensated into one mevalonate (MVA),which will be phosphorylated into diphosphate,then turn into isopentenyl diphosphate (IPP) through decarboxylation.IPP will be isomerased into dimethylallyl diphosphate (DMAPP) by IPP isomerase (IPPI).Geranyl Geranyl diphosphate synthase (GGPPS) catalyze the reaction for DMAPP and IPP.One DMAPP and three IPP molecules condensedinto one GGPP.Two GGPP polymerize into one phytoene by phytoene synthase (PSY).Phytoene desaturase (PDS) catalyze the phytoene into ζ-carotene,which catalyzed into lycopene by ζ-carotene desaturase (ZDS).Lycopene βcyclase (LCYb) and lycopene ε cyclase (LCYe) catalyze the lycopene turn into α-carotene and β-carotene after cyclization reaction.The lutein will be combined after two step of hydroxylation.The latest research advances in terpeniods biosynthesis pathway are summarized in this review and foreground of the field is prospected.