Message - 7th IAL Symposium

Lichen: from genome to ecosystem in a changing world
POSTER SESSION
1I-P
1I: Exploring the lichen microbiome and its multifaceted interactions
(1I-P1) Submission ID: IAL0018-00002
SEASONAL DYNAMICS OF A PHYSCIETUM ADSCENDENTIS-ASSOCIATED
MICROBIAL COMMUNITY
Beck A. 1 , Peršoh D. 2 , Rambold G. 2
1 Lichenology Dept., Botanische Staatssammlung, München, Bavaria, Germany
2 Abteilung Mykologie, Universitaet Bayreuth, Bayreuth, Germany
The factors driving the diversity and structure of corticolous lichen communities have been intensely
studied, but the ecology of the non-lichenized organisms in these communities remains largely unknown. For the
present study, thalli of Xanthoria parietina and Physconia distorta living on a maple tree (Acer pseudoplatanus),
where they were part of the Physcietum adscendentis association were sampled along with bark in spring and
autumn at two expositions (WSW and SSE). The fungal community living in the lichens and on the bark was
assessed by direct PCR, cloning, and screening for restriction fragment length polymorphism (RFLP). RFLP
genotypes detected in the clones revealed a considerably high diversity of lichen-associated fungi, along with the
primary lichen symbionts and the phorophyte. The associated fungal flora was slightly more diverse in P. distorta
than in X. parietina, and the two communities differed in composition. The fungi associated with X. parietina appeared
to be more specialized perhaps because of the high anthraquinone content of the latter species.
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