Fig. 6 in Organ-specific and genotype-dependent constitutive biosynthesis of secoiridoid glucosides in Centaurium erythraea Rafn, and its elicitation with methyl jasmonate

Fig. 6. Genotype-dependent expression of SG metabolic pathway genes. HP – SG high-productive genotypes, LP – low-productive genotypes. Genes encoding putative key enzymes in SG biosynthetic pathway: GPPS – geranyl diphosphate synthase, GES – geraniol synthase, G8O – geraniol-8-oxidase, 8HGO- 8-hydrohygeraniol oxidoreductase, IS – iridoid synthase, IO – iridoid oxidase,7DLGT – 7-deoxyloganetic acid glucosyltransferase, 7DLH1 and 7DLH2 – 7-deoxyloganic acid hydrolase, SLS – secologanin synthase; genes encoding two putative cytochrome P450 reductases – CPR1 and CPR2 are indicated with pink rectangle. The relative expressions of the genes were normalized against 18S rRNA gene as an internal control; LP was set as a calibrator. Asterisks denote statistically significant difference (P <0.05) according to Student's t-test. (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)