Journal
MOLECULAR PHYLOGENETICS AND EVOLUTION
Volume 72, Issue -, Pages 54-60Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ympev.2013.12.010
Keywords
Trebouxia; Xanthoria parietina; Anaptychia ciliaris; Microsatellite; Population; Symbiosis
Funding
- 'LOEWE, Landes-Offensive zur Entwicklung Wissenschaftlich-oekonomischer Exzellenz' of Hesse's Ministry of Higher Education, Research, and the Arts
- Ministerio de Ciencia e Innovacion, Spain [CGL2010-21646/BOS]
- Ministerio de Educacion y Ciencia (Spain)
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Trebouxia decolorans is a widespread and common symbiotic green alga that is found in association with different species of lichen-forming fungi. By applying T. decolorans-specific microsatellite markers, we investigated the within-thallus diversity of T. decolorans in thalli of Xanthoria parietina and Anaptychia ciliaris. We found several algal strains in most of the thalli of both hosts. High genetic differentiation among thalli suggests that algal diversity is generated de novo via mutation in both fungal hosts. Rarefied allelic richness of the algae was higher in thalli of X. parietina. Our results indicate that in X. parietina intrathalline algal diversity is additionally created by environmental uptake of algae either at the start of the symbiotic association or during the lifetime of the thallus. This study indicates that promiscuous host-symbiont associations in lichen symbioses with Trebouxia spp. may be more common than currently recognized. (C) 2014 Elsevier Inc. All rights reserved.
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