Abstract
The effect of temperature stress on the cytosol carbohydrate composition of fungi belonging to various systematic groups was investigated. In Mucorales representatives (subkingdom Eomycota, phylum Archemycota, class Zygomycetes), adaptation to hypo- and hyperthermia occurs via the regulation of trehalose synthesis, although inositol is also involved in these processes in Blakeslea trispora. Basidiomycota (subkingdom Neomycota) use two pathways of biochemical adaptation, depending on the cytosol carbohydrate composition. In the absence of sucrose, glycerol and arabitol are involved in the adaptation to hyperthermia; trehalose accumulates under hypothermic conditions (type I of regulation). Type II regulation (revealed in Pleurotus ostreatus) involves sucrose rather than glycerol or arabitol. The data obtained are discussed in terms of fungal systematics and phylogeny.
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