Paeonol produced by Chaetomium sp., an endophytic fungus isolated from Paeonia suffruticosa

In order to research the relationship between endophytic fungus and active ingredients in medicinal Paeonia suffruticosa, a total of 57 fungal isolates were isolated from the roots, stems, leaves and buds of medicinal plant Paeonia ostii; mycelium was collected after these fungal isolates were fermented on PDA medium for a few days; then the mycelium products were extracted; their extracts were analyzed by gas chromatography-mass spectrometry. With this method, a strain endophytic fungi named J1-2 which can produce paeonol was screened. Paeonol produced by J1-2 was analyzed by using a high resolution mass spectrometer (HRMS) and nuclear magnetic resonance (NMR). The potential paeonol-procucing named J1-2 was identified Chaetomium based on morphological characteristics and ITS sequence analysis. The current research initially indicates that endophytic fungi can affect the potency of peony. At the same time it also indicates that the numerous endophytic fungi inside the medicinal Paeonia suffruticosa are precious resource for the pharmaceutical natural products that are originally from the Paeonia suffruticosa. (C) 2015 Phytochemical Society of Europe. Published by Elsevier B.V. All rights reserved.