Abstract:
:Cells of a newly isolated environmental strain of Candida humicola accumulated 10-fold more polyphosphate (polyP), during active growth, when grown in complete glucose-mineral salts medium at pH 5.5 than when grown at pH 7.5. Neither phosphate starvation, nutrient limitation, nor anaerobiosis was required to induce polyP formation. An increase in intracellular polyP was accompanied by a 4.5-fold increase in phosphate uptake from the medium and sixfold-higher levels of cellular polyphosphate kinase activity. This novel accumulation of polyP by C. humicola G-1 in response to acid pH provides further evidence as to the importance of polyP in the physiological adaptation of microbial cells during growth and development and in their response to environmental stresses.
journal_name
Appl Environ Microbioljournal_title
Applied and environmental microbiologyauthors
McGrath JW,Quinn JPdoi
10.1128/aem.66.9.4068-4073.2000keywords:
subject
Has Abstractpub_date
2000-09-01 00:00:00pages
4068-73issue
9eissn
0099-2240issn
1098-5336journal_volume
66pub_type
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