The capacity for intracellular osmoregulation mediated by free amino acids in three bivalve molluscs |
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| Institution: | 1. Centre for Environmental and Marine Studies and Department of Biology (CESAM), University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;2. IPMA – Portuguese Institute for the Sea and Atmosphere, Avenida Brasília, 1449-006 Lisbon, Portugal;3. King Abdullah University of Science and Technology (KAUST), Red Sea Research Center (RSRC), Biological and Environmental Sciences and Engineering (BESE), Thuwal 23955-6900, Saudi Arabia;1. Department of Biology, CESAM, University of Aveiro, Campus de Santiago, 3810-193 Aveiro, Portugal;2. MARE, Marine and Environmental Sciences Centre, Faculty of Sciences, Lisbon University, Campo Grande, 1749-016 Lisbon, Portugal |
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| Abstract: | The capacity for intracellular osmoregulation mediated by free amino acids was examined using isolated foot preparations of the three bivalve molluscs: the oligohalineCorbiculajaponica Prime, freshwater euryhalineC. leana Prime, and freshwater stenohalineAnodonta woodiana Lea species. In response to a salinity increase in the incubation medium, ninhydrin-positive substances accumulated in the isolated foot of the oligohaline and freshwater euryhaline species, but not in the freshwater stenohaline species. Possible explanations for such a difference were considered along with its evolutionary significance regarding the entrance of bivalves into the freshwater environment. |
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