Membrane fluidity inBacillus subtilis. Physical change and biological adaptation
- 1 June 1988
- journal article
- research article
- Published by Springer Nature in Folia Microbiologica
- Vol. 33 (3) , 161-169
- https://doi.org/10.1007/bf02925900
Abstract
The thermotropic behaviour of membrane phospholipids was estimated in intact cells ofBacillus subtilis. Membrane fluidity (microviscosity) of intact cells depended markedly on the ambient temperaturo — increase in cultivation temperature led to an increase in membrane fluidity. Estimated as anisotropy of 1,6-diphenyl-1,3,5-hexatriene fluorescence, a 30 % difference was observed when cells cultivated at 20 and 40 °C were compared. This lack of rigorous homeostatic control of bulk-phase lipid fluidity prompted the reevaluation of the physiological significance of the “homeoviscous adaptation” inB. subtilis.Keywords
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