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Metabolites ; 12(11)2022 Nov 20.
Article in English | MEDLINE | ID: mdl-36422283

ABSTRACT

Forsythia suspensa (Thunb.) has been widely used in traditional medicines in Asia. According to the 2020 edition of Chinese Pharmacopoeia, phillyrin is the main active ingredient in F. suspensa, which is effective in clearing heat, reducing swelling, and dispersing nodules. F. suspensa leaf is a non-toxic substance and it can be used to make a health tea. Here, we combine elicitors and transcriptomics to investigate the inducible biosynthesis of the phillyrin from the F. suspensa. After the fruits and leaves of F. suspensa were treated with different concentrations of methyl jasmonate (MeJA), the content of phillyrin in the fruits reached a peak at 200 µM MeJA for 12 h, but which was decreased in leaves. To analyze the differences in key enzyme genes involved in the phillyrin biosynthesis, we sequenced the transcriptome of F. suspensa leaves and fruits treated with 200 µM MeJA for 12 h. We hypothesized that nine genes related to coniferin synthesis including: F. suspensa UDP-glycosyltransferase (FsUGT); F. suspensa 4-coumarate coenzyme CoA ligase (Fs4CL); and F. suspensa Caffeoyl-CoA O-methyltransferase (FsCCoAOMT) etc. The qRT-PCR analysis of genes related to phillyrin biosynthesis was consistent with RNA-seq analysis. We also investigated the dynamic changes of genes in F. suspensa leaves and fruits at different time points after 200 µM MeJA treatment, which laid the foundation for further study of the molecular mechanisms regulating the biosynthesis of phillyrin.

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