Antarctic Epilithic Lichens as Niches for Black Meristematic Fungi

• Published in: Biology
• Main Authors: Laura Selbmann, Martin Grube, Silvano Onofri, Daniela Isola, Laura Zucconi
• Format: Text
• Language: English
• Published: Multidisciplinary Digital Publishing Institute 2013
• Subjects: black meristematic fungi; Dothideomycetes; Eurotiomycetes; lichen-associated fungi; phylogeny; Antarctic; Victoria Land; Antarc*; Antarctica
• Online Access: https://doi.org/10.3390/biology2020784

Sixteen epilithic lichen samples (13 species), collected from seven locations in Northern and Southern Victoria Land in Antarctica, were investigated for the presence of black fungi. Thirteen fungal strains isolated were studied by both morphological and molecular methods. Nuclear ribosomal 18S gene sequences were used together with the most similar published and unpublished sequences of fungi from other sources, to reconstruct an ML tree. Most of the studied fungi could be grouped together with described or still unnamed rock-inhabiting species in lichen dominated Antarctic cryptoendolithic communities. At the edge of life, epilithic lichens withdraw inside the airspaces of rocks to find conditions still compatible with life; this study provides evidence, for the first time, that the same microbes associated to epilithic thalli also have the same fate and chose endolithic life. These results support the concept of lichens being complex symbiotic systems, which offer attractive and sheltered habitats for other microbes.