Endophytic fungi in branches of Norway spruce with particular reference to Tryblidiopsis pinastri

A variety of endophytic fungi were isolated from the branches of Norway spruce (Picea abies). We found that as internodes age, the composition of endophytic species gradually changes, both qualitatively and quantitatively. One of the dominating species, Tryblidiopsis pinastri, was most common in young internodes. In contrast, three other common species, Phialocephala scopiformis, Geniculosporium serpens, and Tapesia livido-fusca, were most frequently isolated from old internodes. Mollisia spp. were also common components of the endophytic flora of the Norway spruce in Sweden.