Source:http://linkedlifedata.com/resource/pubmed/id/16661757
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
4
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| pubmed:dateCreated |
2010-6-29
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| pubmed:abstractText |
High rates of phosphate uptake into phosphate-starved Lemna gibba L. G1 were correlated with a high membrane potential (pd = -220 millivolts). In plants maintaining a low pd (-110 millivolts), the uptake rate was only 20% of that of high-pd plants. At the onset of phosphate transport, the membrane of high-pd plants was transiently depolarized. This effect was much smaller in low-pd plants. Light stimulated phosphate uptake and the repolarization upon phosphate-induced depolarization, especially in plants grown without sucrose. The phosphate uptake rate was optimal at pH 6 and decreased with increasing pH, corresponding to the phosphate-induced pd changes. Phosphate starvation stimulated the uptake and increased the phosphate-induced depolarization, thus indicating that phosphate uptake depends on the intracellular phosphate level. It is suggested that uptake of monovalent phosphate in Lemna gibba proceeds by an H(+) cotransport dependent on the proton electrochemical potential difference and, hence, on the activity of an H(+) -extrusion pump.
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| pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-13820900,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-15598,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-16650,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-16655896,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-16659914,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-16661274,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-17799154,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-21813,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-238506,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-4235731,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-4525303,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16661757-4772688
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
Apr
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| pubmed:issn |
0032-0889
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:volume |
67
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
797-801
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| pubmed:dateRevised |
2010-9-15
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| pubmed:year |
1981
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| pubmed:articleTitle |
Relationship between Energy-dependent Phosphate Uptake and the Electrical Membrane Potential in Lemna gibba G1.
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| pubmed:affiliation |
Institut für Botanik der Technischen Hochschule Darmstadt, Schnittspahnstrasse 3 - 5, D-6100 Darmstadt, Federal Republic of Germany.
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| pubmed:publicationType |
Journal Article
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