Re-modeling <em>Chara</em> action potential: II. The action potential form under salinity stress
In part I we established Thiel-Beilby model of the <em>Chara</em> action potential (AP). In part II the AP is investigated in detail at the time of saline stress. Even very short exposure of salt-sensitive <em>Chara</em> cells to artificial pond water with 50 mM NaCl (Saline...
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| Format: | Article |
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AIMS Press
2017-04-01
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| Series: | AIMS Biophysics |
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| Online Access: | http://www.aimspress.com/biophysics/article/1396/fulltext.html |
| _version_ | 1818176261761007616 |
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| author | Mary Jane Beilby Sabah Al Khazaaly |
| author_facet | Mary Jane Beilby Sabah Al Khazaaly |
| author_sort | Mary Jane Beilby |
| collection | DOAJ |
| description | In part I we established Thiel-Beilby model of the <em>Chara</em> action potential (AP). In part II the AP is investigated in detail at the time of saline stress. Even very short exposure of salt-sensitive <em>Chara</em> cells to artificial pond water with 50 mM NaCl (Saline APW) modified the AP threshold and drastically altered the AP form. Detailed modeling of 14 saline APs from 3 cells established that both the Ca<sup>2+</sup> pump and the Ca<sup>2+</sup> channels on internal stores seem to be affected, with the changes sometimes cancelling and sometimes re-enforcing each other, leading to APs with long durations and very complex forms. The exposure to salinity offers further insights into AP mechanism and suggests future experiments. The prolonged APs lead to greater loss of chloride and potassium ions, compounding the effects of saline stress. |
| first_indexed | 2024-12-11T20:13:23Z |
| format | Article |
| id | doaj.art-075dd5d78a2d4089a67b86bdb646d408 |
| institution | Directory Open Access Journal |
| issn | 2377-9098 |
| language | English |
| last_indexed | 2024-12-11T20:13:23Z |
| publishDate | 2017-04-01 |
| publisher | AIMS Press |
| record_format | Article |
| series | AIMS Biophysics |
| spelling | doaj.art-075dd5d78a2d4089a67b86bdb646d4082022-12-22T00:52:14ZengAIMS PressAIMS Biophysics2377-90982017-04-014229831510.3934/biophy.2017.2.298biophys-04-00298Re-modeling <em>Chara</em> action potential: II. The action potential form under salinity stressMary Jane Beilby0Sabah Al Khazaaly1School of Physics, University of NSW, Kensington, NSW 2052, AustraliaMathematics and Statistics, Western Sydney University, Bankstown, NSW 2200, AustraliaIn part I we established Thiel-Beilby model of the <em>Chara</em> action potential (AP). In part II the AP is investigated in detail at the time of saline stress. Even very short exposure of salt-sensitive <em>Chara</em> cells to artificial pond water with 50 mM NaCl (Saline APW) modified the AP threshold and drastically altered the AP form. Detailed modeling of 14 saline APs from 3 cells established that both the Ca<sup>2+</sup> pump and the Ca<sup>2+</sup> channels on internal stores seem to be affected, with the changes sometimes cancelling and sometimes re-enforcing each other, leading to APs with long durations and very complex forms. The exposure to salinity offers further insights into AP mechanism and suggests future experiments. The prolonged APs lead to greater loss of chloride and potassium ions, compounding the effects of saline stress.http://www.aimspress.com/biophysics/article/1396/fulltext.htmlaction potentialThiel-Beilby model<em>Chara</em>salinity stresscytoplasmic Ca<sup>2+</sup> concentrationCa<sup>2+</sup> channels on internal storesinositol triphosphateCa<sup>2+</sup>-activated Cl<sup>–</sup> channelsCa<sup>2+</sup> pump |
| spellingShingle | Mary Jane Beilby Sabah Al Khazaaly Re-modeling <em>Chara</em> action potential: II. The action potential form under salinity stress AIMS Biophysics action potential Thiel-Beilby model <em>Chara</em> salinity stress cytoplasmic Ca<sup>2+</sup> concentration Ca<sup>2+</sup> channels on internal stores inositol triphosphate Ca<sup>2+</sup>-activated Cl<sup>–</sup> channels Ca<sup>2+</sup> pump |
| title | Re-modeling <em>Chara</em> action potential: II. The action potential form under salinity stress |
| title_full | Re-modeling <em>Chara</em> action potential: II. The action potential form under salinity stress |
| title_fullStr | Re-modeling <em>Chara</em> action potential: II. The action potential form under salinity stress |
| title_full_unstemmed | Re-modeling <em>Chara</em> action potential: II. The action potential form under salinity stress |
| title_short | Re-modeling <em>Chara</em> action potential: II. The action potential form under salinity stress |
| title_sort | re modeling em chara em action potential ii the action potential form under salinity stress |
| topic | action potential Thiel-Beilby model <em>Chara</em> salinity stress cytoplasmic Ca<sup>2+</sup> concentration Ca<sup>2+</sup> channels on internal stores inositol triphosphate Ca<sup>2+</sup>-activated Cl<sup>–</sup> channels Ca<sup>2+</sup> pump |
| url | http://www.aimspress.com/biophysics/article/1396/fulltext.html |
| work_keys_str_mv | AT maryjanebeilby remodelingemcharaemactionpotentialiitheactionpotentialformundersalinitystress AT sabahalkhazaaly remodelingemcharaemactionpotentialiitheactionpotentialformundersalinitystress |