First report of clavicipitaceous anamorphic endophytes in hordeum species
Clavicipitaceous endophytes systemically infect many grass species and produce alkaloids that confer resistance to insects (2) and toxicity to mammals (1). The mutualistic anamorphic forms (e.g., Acremonium spp.) do not sporulate or cause symptoms, but they produce distinctive mycelium in their hosts. The incidence of anamorphic endophytes in a portion of the U.S. Hordeum germ plasm collection, held at the National Small Grains Collection in Aberdeen, Idaho, was determined by microscopic examination of 100 stained seed and seedling tissues.