Katalog - Lichenological literature

11467

Werner R.G. (1979): La flore lichenique de la Cordillere Betico-Rifaine. Étude phytogéographique et écologique, Collectanea Botanica [Barcelona], 11: 409-471

Morocco-Rif Mts, new species: Lecidea (Biatora) brunneonigrescens sp. nov., Lecanora (Aspicilia) tingitana sp. nov., and Verrucaria mauretanica sp. nov. Read more...

27025

Werner R.G. & Deschatres R. (1974): Contribution à l'étude des Lichens de la Corse. III, Bulletin de la Société Botanique de France, 121(7-8): 299-318

Cette troisième contribution à la connaissance des Lichens et des Parasymbiotes de la Corse mentionne 144 Lichens provenant de stations non encore explorées à fond, parmi elles 32 espèces, variétés ou formes nouvelles pour le pays, 5 (dont 2 formes) pour la Science. 38 appartiennent à la flore méditerranéenne, 71 à la flore tempérée avec 4 reliquaires de l'Europe froide, 12 cosmopolites, 1 à répartition disjointe et 22 reliques arctique- ou subarctique-alpines. Un genre nouveau a été … Read more...

21930

Werth S. (2012): Fungal-algal interactions in Ramalina menziesii and its associated epiphytic lichen community, Lichenologist, 44(4): 543–560

Lichens are a fascinating example of a symbiotic mutualism. It is still uncertain which processes guide fungal-photobiont interactions, and whether they are random or of a more complex nature. Here, the fungal-algal interactions in Ramalina menziesii and co-occurring taxa are analyzed by using DNA sequences of the algal Internal Transcribed Spacer region (ITS), to investigate fungalalgal associations in juvenile R. menziesii and allied species. Algal species were identified by a combination of BLAST … Read more...

22802

Werth S. (2011): Biogeography and phylogeography of lichen fungi and their photobionts, In: Fontaneto D. (ed.), Biogeography of microorganisms. Is everything small everywhere. The Systematic Association special series, vol. 79, p. 191-208. Cambridge, Cambridge University Press

17542

Werth S. (2010): Population genetics of lichen-forming fungi – a review, Lichenologist, 42(5): 499–519

Population genetics investigates the distribution of genetic variation in natural populations and the genetic differentiation among populations. Lichen-forming fungi are exciting subjects for population genetic studies due to their obligate symbiosis with a green-algal and/or cyanobacterial photobiont, and because their different reproductive strategies could influence fungal genetic structures in various ways. In this review, first, I briefly summarize the results from studies of chemotype variation … Read more...

18717

Werth S. (2011): Optimal sample sizes and allelic diversity in studies of the genetic variability of mycobiont and photobiont populations, Lichenologist, 43(1): 73-81

Population genetic studies of lichen-forming fungi and their algae require appropriate sampling schemes that ensure representative sampling of the genetic variability. One question is whether mycobiont and photobiont populations require different sampling strategies. Here, I applied rarefaction methods to a dataset containing three microsatellite loci of Lobaria pulmonaria and three microsatellite loci of its green-algal photobiont, Dictyochloropsis reticulata. I analysed the sample sizes required … Read more...

29446

Werth S. & Obermayer W. (eds) (2017): Lichen Genomics Workshop II. Institute of Plant Sciences, University of Graz, Austria. 2–5 November 2017. Program and Abstracts, Fritschiana (Graz), 85: 1–50

28234

Werth S. & Sork V. L. (2014): Ecological specialization in Trebouxia (Trebouxiophyceae) photobionts of Ramalina menziesii (Ramalinaceae) across six range-covering ecoregions of western North America, American Journal of Botany, 101: 1127–1140

Premise of the study: Many lichens exhibit extensive ranges spanning several ecoregions. It has been hypothesized that this wide ecological amplitude is facilitated by fungal association with locally adapted photobiont strains. Methods: We studied the identity and geographic distribution of photobionts of the widely distributed North American lichen Ramalina menziesii based on rbcL (chloroplast DNA) and nuclear ribosomal ITS DNA sequences. To test for ecological spe- cialization, we associate photobiont … Read more...

16912

Werth S. & Sork V.L. (2010): Identity and genetic structure of the photobiont of the epiphytic lichen Ramalina menziesii on three oak species in southern California, American Journal of Botany, 97(5): 821-830

Lichens, a classic example of an obligate symbiosis between fungi and photobionts (which could be algae or cyanobacteria), are abundant in many terrestrial ecosystems. The genetic structure of the photobiont population found in association with a lichenforming fungal species could be affected by fungal reproductive mode and by the spatial extent of gene flow in the photobiont. Using DNA sequences from one nuclear ribosomal and two chloroplast loci, we analyzed the genetic structure of the photobiont associated … Read more...

11475

Werth S. & Sork V.L. (2008): Local genetic structure in a North American epiphytic lichen, Ramalina menziesii (Ramalinaceae), American Journal of Botany, 95(5): 568–576

Epiphytic lichens possess unique life history traits that can have conflicting effects on genetic structure: symbiotic mutualism between a fungus with its algal or cyanobacterial photobiont, association with a host plant, and ability to reproduce sexually and asexually. Our study species, Ramalina menziesii, has small ascospores that can facilitate long-distance gene movement, and it is capable of clonal reproduction. The goals of this study are to test whether different haplotypes were differentially … Read more...