Summary: Germination and growth of six xerophilic fungi, and were examined on media of a wide range of water activities (). The influence of three solutes, NaCl, glycerol and a glucose/fructose mixture, was studied at pH 4·0 and pH 6·5 using a plate-slide technique. Germination times and growth rates were affected by solute type, but the influence of pH was less marked. Except for , the fungi grew most strongly on glucose/fructose and were partially or completely inhibited by NaCl. The results showed that a universal isolation medium for xerophilic fungi could be based on glycerol or glucose/fructose but not on NaCl as -limiting solute.


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