Microbial Water Stress Physiology Principles and Perspectives A. D. Brown Department of Biology, University of Wollongong, Australia. The book is concerned with the physiological factors that enable microorganisms to tolerate chronic stress, that is to thrive at low levels of water potential, whether generated by high salinities, high concentrations of non-electrolytes or by low matric potential, and to survive acute stress by adapting to changes in water potential. The thermodynamic principles that underly these physiological responses are examined, as are representative types of natural habitat capable of causing water stress. A chapter is given to the extreme halophils, the Halobacteriaceae, with emphasis on the interactions of protein and lipid chemistry, dissolved salts and water structure. Other chronic stress responses are examined in a range of eu- and prokaryotic microorganisms with emphasis on biochemical as well as physiological requirements. Turgor/volume control is discussed theoretically and empirically in relation to the use of inorganic ions and organic metabolites for the purpose. Prevailing notions of regulating either turgor or volume are challenged. Turgor/volume control with metabolites is treated as a particular example of metabolic regulation and is examined with emphasis on effects of protein concentration. The protective action of compatible solutes is discussed and a prevailing view that these compounds function by stabilizing protein structure is challenged.
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This book is concerned with the physiological factors that enable microorganisms to survive acute water stress by adapting to changes in water potential and to tolerate chronic stress, thriving at low levels of water potential, whether generated by high salinities, high concentrations of non-electrolytes or by low matric potential. Treating a wide range of ecological, physiological and biochemical situations, the book examines the thermodynamic principles that underlie physiological responses, as well as representative types of natural habitats capable of inducing water stress. Covers the extreme halophils, with emphasis on interactions of lipid and protein chemistry, and other chronic stress responses in a range of eukaryotic and prokaryotic microorganisms. Turgor/volume control is thoroughly discussed, and prevailing notions of regulating turgor and volume are challenged.
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Descripción John Wiley & Sons, 1990. Paperback. Estado de conservación: New. 1. Nº de ref. de la librería DADAX0471925799
Descripción John Wiley & Sons. Estado de conservación: New. pp. 328. Nº de ref. de la librería 4686961