Morphogenetic changes in essential oil composition of<i>Hypericum perforatum</i>during the course of ontogenesis

Abstract

Based on the EO composition monitored during these seven morphological stages by GC-MS, principal component analysis and cluster analysis, significant metabolite modifications were observed during the phenological cycle which involved the levels of specific volatile target compounds belonging to the chemical classes of hydrocarbons, monoterpenes and sesquiterpenes.