Fungi from extreme environments, including acidophilic ones, belong to biotechnologically most attractive organisms. They can serve as a source of enzymes and metabolites with potentially uncommon properties and may actively participate within bioremediation processes. In respect of their biotechnological potential, extremophilic fungi are mostly studied as individual species. Nevertheless, microorganisms rarely live separately and they form biofilms instead. Living in biofilms is the most successful life strategy on the Earth and the biofilm is the most abundant form of life in extreme environments including highly acidic ones. Compared to bacterial fraction, fungal part of acidophilic biofilms represents a largely unexplored source of organisms with possible use in biotechnology and especially data on biofilms of highly acidic soils are missing. The functioning of the biofilm results from interactions between organisms whose metabolic capabilities are efficiently combined. When we look on acidophilic fungi and their biotechnological potential we should take this fact into account as well. The practical problem to be resolved in connection with extensive studies of exploitable properties and abilities of acidophilic fungi is the methodology of isolation of strains from the nature. In this respect, novel isolation techniques should be developed.

Department of Biology Faculty of Science Jan Evangelista Purkyně University in Ústí nad Labem Za válcovnou 1000 8 400 01 Ústí nad Labem Czech Republic

Laboratory of Fungal biology Institute of Microbiology ASCR Vídeňská 1083 14220 Prague Czech Republic

Laboratory of Molecular Structure Characterization Institute of Microbiology ASCR Vídeňská 1083 14220 Prague Czech Republic

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