Effect of trehalose on the viability of sporangiospores of the mucorous fungus <Emphasis Type="Italic">Blakeslea trispora</Emphasis> |
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Authors: | O A Vereshchagina A S Memorskaya V M Tereshina |
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Institution: | 1.Winogradsky Institute of Microbiology,Russian Academy of Sciences,Moscow,Russia |
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Abstract: | Sporangiospores of Blakeslea trispora are in a state of exogenous dormancy, and water is the key factor controlling their germination. A wide range of carbohydrates,
ammonium salts, and yeast extract had a weak stimulating effect (less than 50%) on spore germination, whereas amino acids
could significantly inhibit this process. Cultivation of B. trispora on sporogenous sucrose- and trehalose-containing media (S and T spores, respectively) resulted in significant changes in
spore formation, as well as in the chemical composition of spores and their viability. In the presence of trehalose, the amount
of spores increased twofold; spore viability during storage increased as well. All changes in the carbohydrate composition
of the cytosol and in the composition of the spore membrane lipids indicated that the dormancy of T spores was deeper than
that of S spores, which has a favorable effect on their viability. |
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