Phylogenetic analysis of Puccinia distincta and P. lagenophorae, two closely related rust fungi causing epidemics on Asteraceae in Europe.
Phylogenetic analyses of the ITS1-5.8S-ITS2 region of the ribosomal RNA gene cluster were carried out with two short-cycled (aecial/telial) European rusts on Asteraceae, Puccinia distincta causing the current pan-European epidemic on Bellis perennis, and P. lagenophorae causing a similar disease on Senecio spp., as well as the macrocyclic P. obscura which alternates between B. perennis (pycnial and aecial host) and Luzula spp. (main host). All three species formed a well-resolved cluster when compared with the ITS sequences of a range of other rust fungi, using both parsimony and distance methods. The sequences of P. distincta and P. lagenophorae differed from each other at three positions whereas P. obscura differed from P. distincta at 37 points. Together with consistent morphological and epidemiological differences across Europe, these data support the recognition of P. distincta as a separate species from P. lagenophorae. Both may be derived from P. obscura, although the precise evolutionary history remains obscure.
Universität Kaiserslautern, Paul-Ehrlich-Str. 23, 67663 Kaiserslautern, Germany. rwsweber@rhrk.uni-kl.de
Roland W S
RW
Weber
John
J
Webster
Günther
G
Engel
D019659:Asteraceae / Q000382:microbiology*; D001483:Base Sequence; D001487:Basidiomycota / Q000145:classification / Q000235:genetics*; D021903:DNA, Ribosomal Spacer; D005060:Europe; D020459:Genes, rRNA / Q000235:genetics; D008969:Molecular Sequence Data; D005810:Multigene Family; D010802:Phylogeny; D010935:Plant Diseases / Q000382:microbiology*; D013045:Species Specificity
D021903:DNA, Ribosomal Spacer