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First Report of Acremonium typhinum as an Endophyte in American Beachgrass. P. M. Halisky, NJAES, Cook College, Rutgers University, New Brunswick, NJ 08903. J. F. White, Jr., NJAES, Cook College, Rutgers University, New Brunswick, NJ 08903. Plant Dis. 75:537. Accepted for publication 15 January 1991. Copyright 1991 The American Phytopathological Society. DOI: 10.1094/PD-75-0537B.

American beachgrass (Ammophila breviligulata Fernald) is a common sand-binding perennial plant growing on coastal sand dunes in the northeastern United States. Systemic mycelium of Acremonium typhinum Morgan-Jones & W. Gams was observed in and isolated from culms and leaf sheaths of the American beachgrass cultivar Cape. Stromata bearing conidia of A. typhinum were observed in up to 40% of the flowering heads of Cape American beachgrass. Neither systemic mycelium nor stromata of this fungus have been reported previously in Ammophila. Cape American beachgrass was registered in 1974 (1) as an improved cultivar characterized by broad, flat leaves, wide culms, and robust vegetative growth. It is possible that the superior vegetative attributes of Cape, as compared with other beachgrass cultivars, may be due to infection by this beneficial, symbiotic endophyte, a phenomenon previously documented in Acremonium-infected turf and forage grasses.

Reference: (1) F. B. Gaffney and R. W. Duell. Crop Sci. 14:777, 1974.