title: Clonality in the postfire root rot ascomycete Rhizina undulata.
abstract: The aim of the present work was to investigate the potential for territorial and dispersive clonality in natural populations of the postfire root rot ascomycete Rhizina undulata. Population studies based on vegetative compatibility tests were done with strains isolated from individual sporocarps at five burned sites in three different localities (separated by 20-40 km) in the Curronian Spit of western Lithuania. Among a total of 103 strains, the tests identified 14 distinct vegetative compatibility groups (VCGs) of R. undulata, 13 of which were represented by 2-48 strains and three were encountered at 2-4 different sites. Occurrence on spatially separated sites of the same VCG of the fungus indicated a presence of dispersive clonality in R. undulata populations. On a local scale clusters of vegetative compatible sporocarps usually occupied discrete territories, implying territorial clonality. The two largest VCGs covered areas up to 7 and 3 m across. The results show that both dispersive and territorial clones are characteristics of natural populations of the fungus.
authors.affiliation: Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, Box 7026, S-750 07 Uppsala, Sweden.
authors.forename: Vaidotas
authors.initials: V
authors.lastname: Lygis
authors.forename: Rimvydas
authors.initials: R
authors.lastname: Vasiliauskas
authors.forename: Jan
authors.initials: J
authors.lastname: Stenlid
mesh_terms: D001203:Ascomycota / Q000145:classification / Q000235:genetics* / Q000502:physiology*; D004271:DNA, Fungal / Q000032:analysis; D005390:Fires; D014644:Genetic Variation; D008097:Lithuania; D028223:Pinus / Q000382:microbiology*; D010935:Plant Diseases / Q000382:microbiology*; D018517:Plant Roots / Q000382:microbiology*; D013172:Spores, Fungal / Q000502:physiology; D014197:Trees / Q000382:microbiology
chemical_list: D004271:DNA, Fungal