| Sodium and chloride regulation in freshwater and osmoconforming larvae of Culex mosquitoes. | |
| | |
MedLine Citation:
|
PMID: 11606608 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
|
In this study, we examined aspects of Na(+) and Cl(-) regulation in mosquito larvae of the genus Culex, a group that includes species that tolerate high salinity as well as other forms that are restricted to fresh water. When the euryhaline osmoconformer C. tarsalis was acutely transferred from 30 % to 50 % sea water, the patterns of hemolymph Na(+) and Cl(-) regulation were similar. The underlying regulatory mechanisms for these two ions have very different characteristics. In C. tarsalis, Na(+) efflux was significantly elevated compared with the rates measured in the freshwater-restricted C. quinquefasciatus, while Cl(-) influx was relatively lower. The modulation of Na(+) efflux and Cl(-) influx allowed C. tarsalis to avoid a potential salt load and ionic disturbance in the hemolymph during an acute increase ( )in salinity. The observed adjustment of NaCl regulation departs from that determined for other euryhaline organisms and is integral to the osmoconforming response. At the other extreme of the salinity spectrum, we observed that C. tarsalis faces difficulties in ion regulation in habitats with low NaCl levels because of its inability to reduce ion efflux and adjust ion absorption rates to maintain hemolymph ion balance. In contrast, C. quinquefasciatus exhibited a reduced ion efflux and the ability to upregulate Na(+) uptake, traits necessary to extend its lower salinity limit. |
| | |
Authors:
|
M L Patrick; R J Gonzalez; T J Bradley |
Related Documents
:
|
8048618 - Fasting alters basal and stimulated ion transport in piglet jejunum. 11875258 - Pancreatic ductal bicarbonate secretion: past, present and future. 8882608 - Mediation of cimetidine secretion by p-glycoprotein and a novel h(+)-coupled mechanism ... 21102768 - Refractive index of nh(4)cl-h2o as a function of wavelength: the effect of temperature ... 20553688 - Effect of added monovalent electrolytes on the myelin formation from charged lipids. 21127248 - Carbon nanotubes with temperature-invariant viscoelasticity from -196 degrees to 1000 d... |
Publication Detail:
|
Type: Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S. |
Journal Detail:
|
Title: The Journal of experimental biology Volume: 204 ISSN: 0022-0949 ISO Abbreviation: J. Exp. Biol. Publication Date: 2001 Oct |
Date Detail:
|
Created Date: 2001-10-18 Completed Date: 2002-02-21 Revised Date: 2006-11-15 |
Medline Journal Info:
|
Nlm Unique ID: 0243705 Medline TA: J Exp Biol Country: England |
Other Details:
|
Languages: eng Pagination: 3345-54 Citation Subset: IM |
Affiliation:
|
Department of Ecology and Evolutionary Biology, University of California, Irvine, CA 92697-2525, USA. mlpatric@uci.edu |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
Animals Biological Transport Chlorides / metabolism* Culex / growth & development, physiology* Hemolymph / metabolism Kinetics Larva / physiology* Osmolar Concentration Sodium / metabolism* Water-Electrolyte Balance* |
| Chemical | |
Reg. No./Substance:
|
0/Chlorides; 7440-23-5/Sodium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: The molecular basis for spectral tuning of rod visual pigments in deep-sea fish.
Next Document: Selective adaptation to noxious foods by a herbivorous insect.