Control of Membrane Fluidity in Fusarium
Despite extensive documentation of the large and varied lipid content of the eukaryotic fungi, relatively little information has been developed on the control of lipid fluidity as it relates to maintenance of the structure and function of fungal membrane components. Fungi imperfecti of the genus Fusarium have been the subject of several investigations aimed at determining the identity and amount of the major lipid classes which occur under various sets of growth conditions (Bhatia et al., 1973; Barran et al., 1976; Bhatia and Arneja, 1978). Many potentially important plant pathogens represent races of species of this genus and hence the effects of environmental parameters on membrane fluidity and function, especially as they relate to vegetative growth, metabolism, and sporulation, may take on added practical significance. Investigation of the structure of cytoplasmic membranes and endoplasmic reticular membranes by freeze-fracture electron microscopic techniques (Miller, 1980b) has shown that Fusarium cellular membranes fit the fluid mosaic model which is the accepted norm for most eukaryotic cells. Intrinsic membrane proteins appear as particles on the fracture faces of the fractured membranes.
KeywordsMembrane Fluidity Fusarium Oxysporum Fusarium Species Spin Probe Desaturase Activity
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