Details

Autor(en) / Beteiligte

• De Carolis, Roberto
• Cometto, Agnese
• Moya, Patricia
• Barreno, Eva
• Grube, Martin
• Tretiach, Mauro
• Leavitt, Steven D
• Muggia, Lucia

Titel

Photobiont Diversity in Lichen Symbioses From Extreme Environments

Ist Teil von

• Frontiers in microbiology, 2022-03, Vol.13, p.809804-809804

Ort / Verlag

Switzerland: Frontiers Media S.A

Erscheinungsjahr

2022

Quelle

Elektronische Zeitschriftenbibliothek (Open access)

Beschreibungen/Notizen

• Fungal-algal relationships-both across evolutionary and ecological scales-are finely modulated by the presence of the symbionts in the environments and by the degree of selectivity and specificity that either symbiont develop reciprocally. In lichens, the green algal genus Puymaly is one of the most frequently recovered chlorobionts. species-level lineages have been recognized on the basis of their morphological and phylogenetic diversity, while their ecological preferences and distribution are still only partially unknown. We selected two cosmopolitan species complexes of lichen-forming fungi as reference models, i.e., and , to investigate the diversity of their associated spp. in montane habitats across their distributional range worldwide. The greatest diversity of species-level lineages was recovered in the altitudinal range 1,000-2,500 m a.s.l. A total of 10 distinct species-level lineages were found to associate with either mycobiont, for which new photobionts are reported. One previously unrecognized species-level lineage was identified and is here provisionally named "A52." Analyses of cell morphology and ultrastructure were performed on axenically isolated strains to fully characterize the new "A52" and three other previously recognized lineages, i.e., "A02," "A04," and "A10," which were successfully isolated in culture during this study. The species-level diversity of associating with the two lichen-forming fungi in extreme habitats helps elucidate the evolutionary pathways that this lichen photobiont genus traversed to occupy varied climatic and vegetative regimes.