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Title: Effects of environmental temperature on members of the mucorales
Author: Hammonds, Peter
ISNI:       0000 0001 3529 0165
Awarding Body: University of Aston in Birmingham
Current Institution: Aston University
Date of Award: 1984
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The following investigation characterises the interaction between temperature and growth in psychrophilic, mesophilic and thermophilic fungi in order to gain further insight into the physiological mechanisms underlying fungal growth at extreme temperatures. In the first part of the investigation, the effect of environmental temperature on the growth of vegetative mycelium and sporangiospore production and germination was considered in order to determine the cardinal temperatures of these activities in different thermal groups. Subsequent investigations of plasma membrane permeability suggested that plasma membrane structure and function may be significant in establishing both the upper and lower growth temperature limits characteristic of psychrophiles, mesophiles and thermophiles. Analysis of the plasma membrane fractions revealed significant differences in membrane phospholipid composition between these thermal groups and it is suggested that the differing cardinal growth temperatures characteristic of psychrophilic, mesophilic and thermophilic fungi reflect the temperature ranges over which these organisms exhibit levels of plasma membrane fluidity sufficient to maintain membrane-associated growth processes. In contrast, the membrane protein components appear uniform in both character and thermostability and are therefore unlikely to contribute to this phenomenon.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
Keywords: Biological Sciences