Endophyte effects on drought tolerance of turf-type tall fescue

The response of tall fescue [Schedonorus arundinaceus (Schreb.) Dumort.], infected with fungal endophytes, and subjected to drought stress has varied, presumably due to variability in host–endophyte associations. Much of this research has focused on forage ecotypes; less is known about the effects of endophytes on managed turfgrasses. The objective of these trials was to determine if the presence of fungal endophytes in turf-type tall fescue provides an advantage to the host grass when exposed to drought conditions. Five endophyte-free and endophyte-infected field populations were established in Fayetteville, AR, and Albany, OR. A greenhouse trial was also established in Albany. Turf was subjected to drought and lightbox photos were evaluated to determine days until 75%, 50%, and 25% green cover. Overall, endophyte infection had no consistent effect on the drought response of tall fescue. Although there was no effect on drought response, endophyte infection in turf may confer other benefits, and may still be a valuable tool for turfgrass management.