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- W4281564595 abstract "Abstract The roles extracellular polymeric substances (EPS) play in mineral attachment and weathering were studied using genetically modified biofilms of the rock-inhabiting fungus Knufia petricola strain A95. Mutants deficient in melanin and/or carotenoid synthesis were grown as air-exposed biofilms. Extracted EPS were quantified and characterised using a combination of analytical techniques. The absence of melanin affected the quantity and composition of the produced EPS: mutants no longer able to form melanin synthesised more EPS containing fewer pullulan-related glycosidic linkages. Moreover, the melanin-producing strains attached more strongly to the mineral olivine and dissolved it at a higher rate. We hypothesise that the pullulan-related linkages, with their known adhesion functionality, enable fungal attachment and weathering. The released phenolic intermediates of melanin synthesis in the Δ sdh1 mutant might play a role similar to Fe-chelating siderophores, driving olivine dissolution even further. These data demonstrate the need for careful compositional and quantitative analyses of biofilm-created microenvironments." @default.
- W4281564595 created "2022-05-27" @default.
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- W4281564595 date "2022-05-26" @default.
- W4281564595 modified "2023-10-18" @default.
- W4281564595 title "The role of extracellular polymeric substances of fungal biofilms in mineral attachment and weathering" @default.
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- W4281564595 doi "https://doi.org/10.1038/s41529-022-00253-1" @default.
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