Identification of extracellular siderophores and a related peptide from the endophytic fungus Epichloë festucae in culture and endophyte-infected Lolium perenne

► Epichloënin A has been characterized as a ferrichrome octapeptide by HRMSn and NMR. ► The minor heptapeptide variant epichloënin B has been characterized by HRMSn. ► Ferriepichloënin A was detected in guttation fluid of endophyte-infected plants. ► The related peptide epichloëamide was also detected in guttation fluid. ► Epichloëamide has been characterized as an octapeptide by HRMSn.