ISSN:
1574-6968
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Biology
Notes:
Several acid tolerance responses of Escherichia coli were associated with secretion into the growth media of components (frequently proteins) which altered acid tolerance of other cultures. First, medium filtrates from cultures induced to acid tolerance by several conditions converted pH 7.0-grown organisms to tolerance and, for most such responses, filtrate proteins were needed for full induction. Secondly, filtrates from cultures induced to acid sensitivity at alkaline pH produced sensitisation of resistant cultures. Thirdly, filtrates from inherently tolerant or sensitive strains altered tolerance or sensitivity of normal strains. In many cases, filtrate components were essential for the original response e.g. acid habituation at pH 5.O. Extracellular components may function as intermediates only in stress tolerance responses, but other adaptive responses must be tested as such components may function in other inducible processes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1574-6968.1998.tb13902.x
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