Abstract
A Botrytis cinerea strain isolated from glacier forefield sediment was able to release metabolites promoting element solubilization from sediments of glacier forefields on calcareous (Ca, Mg, Al, Mn) and siliceous (Ca, Al, Fe, Zn, Ni) bedrock. In calcareous glacier forefield sediment, solubilization efficiency for Al and Mn was about 2.5- and 1.3-fold higher with nitrate- compared to ammonium-N, respectively. In siliceous glacier forefield sediment, the efficiency of solubilization was enhanced by a factor of about 2.3 for Fe, 1.6 for Al, and 1.5 for Zn, respectively, in the presence of nitrate-N compared to ammonium-N. In the presence of a particular N-source (nitrate or ammonium, respectively), organic acids concentration, acidification and biomass of cultures were affected by the presence and the nature of the glacier forefield sediment present. Calcareous as well as siliceous glacial sediment exerted a stimulatory effect on the fungus.
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