Abstract
Lonicera japonica is used in Chinese herbal medicines with a wide spectrum of pharmacological properties associated with chlorogenic acid, flavonoid and iridoid. The biosynthesis of these compounds could be affected by genetic inheritance and epigenetic modification. However, the mechanisms that regulate the expression of genes involved in the biosynthesis of these compounds are rarely known. The results of qRT-PCR showed that the biosynthesis gene expression of these compounds was related to histone H3K4 and H3K9 methylation levels. These active compounds content of L. japonica were measured by UPLC-MS/MS. H3K4me3 showed a positive correlation with chlorogenic acid and loganic acid content, and H3K9me positively correlated with luteolin content. The correlation between histone methylation levels and the levels of luteolin and loganic acid in L. japonica from different producing areas validate the regulatory role of histone methylation in biosynthesis of bioactive compounds. Our study demonstrated a potential regulatory network of H3K9/H3K4 methylation to gene expression and content of secondary metabolites, and provided a basis for understanding the mechanism underlying the variation of major bioactive compounds in L. japonica.Electronic supplementary materialThe online version of this article (10.1007/s11033-020-05990-7) contains supplementary material, which is available to authorized users.
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