Webpages tagged with «lichen»

Published Feb. 6, 2013 11:47 AM

Lichens are highly specialized symbioses between heterotrophic fungi and autotrophic green algae or cyanobacteria. Polar and alpine habitats are mostly dominated by lichens, which successfully outcompete vascular plants and bryophytes in terms of biodiversity and often also biomass. Previous results by the applicant show that (sub)antarctic and arctic populations of Cetraria aculeata select different strains of the green algal photobiont Trebouxia jamesii s. lat.  than temperate populations. However, it is so far unknown, whether this is just a phylogeographic pattern or whether genetic differences between the photobionts are associated with differences in physiological traits (ecotypic differentiation).

Published Feb. 4, 2013 12:31 PM

Lichens are highly specialized symbioses between heterotrophic fungi and autotrophic green algae or cyanobacteria. Polar and alpine habitats are mostly dominated by lichens, which successfully outcompete vascular plants and bryophytes in terms of biodiversity and often also biomass. Previous results by the applicant show that (sub)antarctic and arctic populations of Cetraria aculeata select different strains of the green algal photobiont Trebouxia jamesii s. lat.  than temperate populations. However, it is so far unknown, whether this is just a phylogeographic pattern or whether genetic differences between the photobionts are associated with differences in physiological traits (ecotypic differentiation).