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Neuroendocrine regulation of carbonic anhydrase expression in the gills of the euryhaline green crab,Carcinus maenas
Hormone control of carbonic anhydrase levels in the gills of the green crab that tolerates different salt levels
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Abstract
CA activity in green crabs increases with low salinity exposure, showing a link to CA gene expression.
- Green crabs acclimated to low salinity displayed an increase in both CA gene expression and activity.
- Eyestalk ablation in green crabs at high salinity led to increased CA expression in the posterior gills, despite the absence of low salinity conditions.
- Low salinity further stimulated CA expression in the posterior gills of green crabs following eyestalk ablation.
- No changes in CA activity or expression were observed in the anterior gills of green crabs or in any gills of rock crabs in response to low salinity or eyestalk ablation.
- The findings suggest that CA gene expression in euryhaline species is inhibited by a repressor in the eyestalk, a mechanism not present in stenohaline species.
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