Fig. 6

Differentially accumulated metabolites involved in enriched pathways detected among the four treatments (fire drill treatment (F), fire drill + brine treatment (FS), cold drill treatment (D) and cold drill + brine treatment (DS)) in agarwood from A. sinensis. A Flavonoid/flavone and flavonol biosynthesis. Compounds with superscripts ff are involved in flavone and flavonol biosynthesis whereas b is involved in flavonoid/flavone and flavonol biosynthesis. B Sesquiterpenoid and triterpenoid biosynthesis. C Biosynthesis of secondary metabolites. Metabolite abundance levels (ion intensities) in the four treatments (F, FS, D and DS) were log10 transformed. Those with red color indicates high abundance whereas deep to sea blue denotes absence or low accumulation of metabolites (see legend on right side of the figure)