Journal
MICROBIOLOGY
Volume 80, Issue 4, Pages 455-460Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0026261711040199
Keywords
Aspergillus niger; heat shock; trehalose; phosphatidic acids; sphingolipids
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Comparison of the changes in the composition of the membrane lipids and soluble cytosol carbohydrates caused by two types of heat influence (within the tolerance zone and heat shock-level) revealed fundamental differences in the stress response of fungal cells. In three fungal species, Aspergillus niger, Pleurotus ostreatus, and Cunninghamella japonica, increased levels of trehalose and phosphatidic acids were observed under heat shock, while heat influences within the tolerance zone had no such effect. Under heat shock, the ratio of saturated fatty acids did not increase in any of the major phospholipids of all the studied species. This is in contradiction with the existing hypothesis and confirms the previously suggested the hypothesis of membrane stabilization by heat-protecting compounds.
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