Endophytic fungi in foliage of some Cupressaceae in Oregon

Endophytic fungi were isolated from foliage of four host species of Cupressaceae sampled from 19 sites in Oregon.Chamaecyparis lawsoniana and Thuja plicata showed high overall rates of infection (30-50%) while Calocedrus decurrensand Juniperus occidentalis showed lower rates (10-35%). For any particular host, samples from homogeneous stands with aclosed canopy showed higher infection rates than those from mixed stands with an open canopy. For a given tree, infection ratestended to increase with increasing foliage age and decreasing distance from the trunk (exceptions are noted in the text below). Themost commonly isolated endophytes include Linodochium sp. and Geniculosporium sp. on C. decurrens; Scolecosporiella sp.,Nodulisporium sp., Geniculosporium sp., and Chloroscypha alutipes on C. lawsoniana; Retinocyclus abietis anamorph andHormonema sp. on J. occidentalis; and Chloroscypha seaveri on T. plicata.