Chloride-dependent transmural potential in the rectal wall of schistocerca gregaria
Rectum trammural potential (PD) and short-circuit current (Isc) of the desert locust, Schistocercu gregaria, have been studied in vitro, with everted rectal wall preparations in solutions of different ionic composition. Initially, a PD of about 35 mV (lumen positive) and a Isc of about 300 4 cm-*...
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| Format: | info:eu-repo/semantics/article |
| Language: | eng |
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Elsevier
2016
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10171/39949 |
| _version_ | 1793400129468760064 |
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| author | Herrera-Mesa, L. (Luis) Jordana, R. (Rafael) Ponz, F. (Francisco) |
| author_facet | Herrera-Mesa, L. (Luis) Jordana, R. (Rafael) Ponz, F. (Francisco) |
| author_sort | Herrera-Mesa, L. (Luis) |
| collection | DSpace |
| description | Rectum trammural potential (PD) and short-circuit current (Isc) of the desert locust,
Schistocercu gregaria, have been studied in vitro, with everted rectal wall preparations in solutions of
different ionic composition. Initially, a PD of about 35 mV (lumen positive) and a Isc of about
300 4 cm-* were recorded. Omission of sodium or potassium (Tris as substitute), from the
luminal side or from both sides led to an increase of 4 to 6 mV in PD (lumen more positive) together
with an increase in IBC. In the absence of chloride alone (sulphate as substitute) the PD quickly
dropped to nearly zero. In each case the control values were recovered on replacing the corresponding
ions. Neither the PD nor the IW changed when substitutions affected only the haemocoelic solution.
These findings corroborate the assumption that active transport of chloride ions from lumen to
haemolymph is the major factor for transmural PD and account for the short-circuit current in the
rectal wall of desert locust. A working scheme is given to explain the influence of sodium, potassium,
and chloride ions on the PD. |
| format | info:eu-repo/semantics/article |
| id | oai:dadun.unav.edu:10171-39949 |
| institution | Universidad de Navarra |
| language | eng |
| publishDate | 2016 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | oai:dadun.unav.edu:10171-399492020-03-03T13:22:00Z Chloride-dependent transmural potential in the rectal wall of schistocerca gregaria Herrera-Mesa, L. (Luis) Jordana, R. (Rafael) Ponz, F. (Francisco) Chloride-dependent Transmural potential Rectal wall Schistocerca gregaria Materias Investigacion::Ciencias de la vida::Zoología Rectum trammural potential (PD) and short-circuit current (Isc) of the desert locust, Schistocercu gregaria, have been studied in vitro, with everted rectal wall preparations in solutions of different ionic composition. Initially, a PD of about 35 mV (lumen positive) and a Isc of about 300 4 cm-* were recorded. Omission of sodium or potassium (Tris as substitute), from the luminal side or from both sides led to an increase of 4 to 6 mV in PD (lumen more positive) together with an increase in IBC. In the absence of chloride alone (sulphate as substitute) the PD quickly dropped to nearly zero. In each case the control values were recovered on replacing the corresponding ions. Neither the PD nor the IW changed when substitutions affected only the haemocoelic solution. These findings corroborate the assumption that active transport of chloride ions from lumen to haemolymph is the major factor for transmural PD and account for the short-circuit current in the rectal wall of desert locust. A working scheme is given to explain the influence of sodium, potassium, and chloride ions on the PD. 2016-02-17T18:32:58Z 2016-02-17T18:32:58Z 1976 info:eu-repo/semantics/article https://hdl.handle.net/10171/39949 eng This work was supported by grants from the Spanish ‘Ministerio de Educacicn y Ciencia’. info:eu-repo/semantics/openAccess application/pdf Elsevier |
| spellingShingle | Chloride-dependent Transmural potential Rectal wall Schistocerca gregaria Materias Investigacion::Ciencias de la vida::Zoología Herrera-Mesa, L. (Luis) Jordana, R. (Rafael) Ponz, F. (Francisco) Chloride-dependent transmural potential in the rectal wall of schistocerca gregaria |
| title | Chloride-dependent transmural potential in the rectal wall of schistocerca gregaria |
| title_full | Chloride-dependent transmural potential in the rectal wall of schistocerca gregaria |
| title_fullStr | Chloride-dependent transmural potential in the rectal wall of schistocerca gregaria |
| title_full_unstemmed | Chloride-dependent transmural potential in the rectal wall of schistocerca gregaria |
| title_short | Chloride-dependent transmural potential in the rectal wall of schistocerca gregaria |
| title_sort | chloride-dependent transmural potential in the rectal wall of schistocerca gregaria |
| topic | Chloride-dependent Transmural potential Rectal wall Schistocerca gregaria Materias Investigacion::Ciencias de la vida::Zoología |
| url | https://hdl.handle.net/10171/39949 |
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