Abstract: Endophytic fungi Neotyphodium coenophialum and N. lolii have symbiotic relation to tall fescue (Festuca arundinacea) and perennial ryegrass (Lolium perenne) respectively.

• 内生真菌Neotyphodium coenophialum和N.；lolii与高羊茅（Festuca arundinacea）和多年生黑麦草（Lolium perenne）构成共生关系。