Affiliation: | Physiologische Okoiogie der Pflamsen, Botanisches Institute Universitat Tubingen, Auf der Morgenstelle 1, D-72076 Tubingen, Germany;Department of Microbial Ecology, University of Lund, Helgonavagen 5, S-223 62 Lund, Sweden;Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, Box 7026, S-750 07 Uppsala, Sweden |