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Abstract Detail


Bryological and Lichenological Section/ABLS

Schmull, Michaela [1].

Preliminary results of a phylogenetic study on epiphytic Lecidea s.lat.

ZAHLBRUCKNER’S concept of the genus Lecidea s.lat. is extremely heterogenous and includes saxicolous and non-saxicolous species. Even after the segregation of over 30 genera of different family affiliations, hundreds of species still remain in that genus. About one hundred saxicolous species belong to the newly described genus Lecidea s.str. (Hertel 1984). The systematic position of the remaining species is still unclear. Here, a phylogenetic approach is presented to clarify the positions of frequently encountered species of this heterogenous group. Therefore, DNA of species of the genus Lecidea s.lat. and allied genera was extracted and sequences were obtained from nrLSU and mtSSU rDNA. Newly obtained sequences were aligned together with sequences of Lecanoromycetes available in Genbank. Data were analyzed using a Bayesian approach (Huelsenbeck et al. 2001). The nucleotide substitution model was selected using the Akaike Information Criterion with the program Modeltest (Posada & Crandall 1997). Using PAUP*, majority-rule consensus trees were calculated after reaching likelihood convergence to calculate the posterior probabilities of the tree nodes. Additionally, different morphological and anatomical characters used in traditional classification of the investigated species are discussed against the background of the phylogeny.


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1 - University of Goettingen, Department of Systematic Botany, Albrecht von Haller Institute for Plant Sciences, Untere Karspuele 2, Goettingen, D-37073, Germany

Keywords:
Lecideaceae
Lecidea
nuclear large subunit
mitochondrial small subunit
molecular phylogenetics.

Presentation Type: Poster:Posters for Sections
Session: 48-9
Location: Auditorium/Bell Memorial Union
Date: Tuesday, August 1st, 2006
Time: 12:30 PM
Abstract ID:53


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