Creation of stable associations between perennial ryegrass or tall fescue and fungal endophytes.

摘要

The ability of 15 isolates of endophytic fungi isolated from 10 species of grasses to form compatible associations following artificial infection with perennial ryegrass (Lolium perenne, cv. Vigor) and tall fescue (Festuca arundinacea, cv. Clarine)was examined. Twenty-two associations were obtained, only 8 failed. The species Neotyphodium lolii, N. coenophialum, LpTG-2, Epichloe festucae, E. bromicola and Gliocladium-like endophyte, could be associated with both L. perenne and F. arundinacea. Acremonium sp. from L. persicum could be associated with L. perenne only. The observation of infected plants after 6 months and the study of mycelial transmission to the seeds showed the stability of the following associations: F. arundinacea with N. coenophialum and N. lolii, L. perenne with N. lolii, LpTG-2, E. festucae and Gliocladium-like. Acremonium sp. from L. persicum was not able to survive in L. perenne for a long time. Various aspects of partial incompatibility were observed among the associations