Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Water balance systems of Rangia cuneata: ionic and amino acid regulation in changing salinities

Water balance systems of Rangia cuneata: ionic and amino acid regulation in changing salinities 227 61 61 2 3 J. Otto S. K. Pierce Department of Zoology University of Maryland 20742 College Park MD USA Abstract In order to study the interaction of the extracellular and intracellular osmoregulatory systems of the bivalve Rangia cuneata , we have measured blood osmotic and ionic concentrations together with intracellular free amino acid concentrations and total tissue water under identical salinity conditions. Like freshwater bivalves, the blood of R. cuneata is maintained hyperosmotic (50 mOsm) to the environment in salinities below 110 mosm by the regulation of Na + , Cl - , K + and Ca 2+ concentrations. On the other hand in company with marine bivalves, R. cuneata also regulates intracellular free amino acids (FAA) as a mechanism to control cellular volume during osmotic stress over the entire non-lethal salinity range (3 to 620 mOsm). Alanine is the predominant intracellular osmotic effector. Thus, by utilizing the osmoregulatory mechanisms of both marine and freshwater bivalves, R. cuneata is able to tolerate salinities ranging from freshwater to 25 ppt and to traverse the faunal salinity boundary, known as the horohalinicum (5 to 8 ppt), controlling cell volume throughout. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Marine Biology Springer Journals

Water balance systems of Rangia cuneata: ionic and amino acid regulation in changing salinities

Otto, J.; Pierce, S.
Marine Biology , Volume 61 (2) – Feb 1, 1981
Download PDF
8 pages

Loading next page...
 
/lp/springer-journals/water-balance-systems-of-rangia-cuneata-ionic-and-amino-acid-YUasVx3If7

References (17)

Publisher
Springer Journals
Copyright
Copyright © 1981 by Springer-Verlag
Subject
Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
ISSN
0025-3162
eISSN
1432-1793
DOI
10.1007/BF00386658
Publisher site
See Article on Publisher Site

Abstract

227 61 61 2 3 J. Otto S. K. Pierce Department of Zoology University of Maryland 20742 College Park MD USA Abstract In order to study the interaction of the extracellular and intracellular osmoregulatory systems of the bivalve Rangia cuneata , we have measured blood osmotic and ionic concentrations together with intracellular free amino acid concentrations and total tissue water under identical salinity conditions. Like freshwater bivalves, the blood of R. cuneata is maintained hyperosmotic (50 mOsm) to the environment in salinities below 110 mosm by the regulation of Na + , Cl - , K + and Ca 2+ concentrations. On the other hand in company with marine bivalves, R. cuneata also regulates intracellular free amino acids (FAA) as a mechanism to control cellular volume during osmotic stress over the entire non-lethal salinity range (3 to 620 mOsm). Alanine is the predominant intracellular osmotic effector. Thus, by utilizing the osmoregulatory mechanisms of both marine and freshwater bivalves, R. cuneata is able to tolerate salinities ranging from freshwater to 25 ppt and to traverse the faunal salinity boundary, known as the horohalinicum (5 to 8 ppt), controlling cell volume throughout.

Journal

Marine Biology – Springer Journals

Published: Feb 1, 1981

There are no references for this article.