| Membrane potential fluctuations in Chara australis: a characteristic signature of high external sodium. | |
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MedLine Citation:
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PMID: 19499217 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We have studied fluctuations in membrane PD in Chara australis at frequencies between 1 and 500 mHz, by classical noise analysis and by inspection of the PD time-course. The former shows (1) a quasi-Lorentzian (1/f (2)) rise of noise power as frequency falls, and (2) a marked increase in noise power when the cell is exposed to high salinity (Chara australis is a salt-sensitive species). The latter shows that, as well as initiating depolarization, exposure to 50 mM Na as either chloride or sulfate usually initiates a continuous but random series of small depolarizations which gives rise to the increase in noise and whose mechanism is discussed. |
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Authors:
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Sabah Al Khazaaly; N Alan Walker; Mary Jane Beilby; Virginia A Shepherd |
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Publication Detail:
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Type: Journal Article Date: 2009-06-05 |
Journal Detail:
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Title: European biophysics journal : EBJ Volume: 39 ISSN: 1432-1017 ISO Abbreviation: Eur. Biophys. J. Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2009-11-09 Completed Date: 2010-02-01 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8409413 Medline TA: Eur Biophys J Country: Germany |
Other Details:
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Languages: eng Pagination: 167-74 Citation Subset: IM |
Affiliation:
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Plant Membrane Biophysics Group, School of Physics, University of NSW, Sydney, NSW, 2052, Australia. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Chara
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cytology*,
drug effects* Dose-Response Relationship, Drug Membrane Potentials / drug effects* Osmolar Concentration Osmotic Pressure Salinity Sodium / pharmacology* Time Factors |
| Chemical | |
Reg. No./Substance:
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7440-23-5/Sodium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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