Linked Life Data

3970532

Source:http://linkedlifedata.com/resource/pubmed/id/3970532

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1985-3-21
pubmed:abstractText
31P NMR was used to study the in vivo response of intracellular phosphorus-containing compounds of cell suspension cultures of Nicotiana tabacum to extracellular events. Limitation of the oxygen supply in a static system (sealed tube) caused a strong pH decrease of the cytoplasm and a smaller fall in the vacuolar pH. The rate of this process was independent of the age of the cells, except for those at the end of the growth cycle where either reserve supplies of inorganic phosphate have been depleted or metabolism has ceased. The cells can be returned quickly to their normal pH and metabolic status by reoxygenation after depletion times as long as 4.5 h. Regassing with N2 after anaerobiosis also caused the return of the nearly normal pH status, which indicates that rapid cell acidification is caused almost entirely by CO2 accumulation. In a second type of anaerobiosis, attained by continual passage of N2, cytoplasmic pH fell only slowly to a constant value higher than in the static case. Here acidification appeared to arise, at least in part, from lactate accumulation. Provided aeration occurred, the cytoplasm was maintained at a constant pH of 7.5 +/- 0.1 for changes in the medium pH value between 6.5 and 3. The biochemical and biotechnological implications of these results are discussed.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0003-9861
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
236
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
731-40
pubmed:dateRevised
2001-11-28
pubmed:meshHeading
pubmed:year
1985
pubmed:articleTitle
Phosphorus-31 nuclear magnetic resonance investigation of the in vivo regulation of intracellular pH in cell suspension cultures of Nicotiana tabacum: the effects of oxygen supply, nitrogen, and external pH change.
pubmed:publicationType
Journal Article