1981
DOI: 10.1002/jez.1402150309
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The role of amino acids in anaerobiosis and osmoregulation in bivalves

Abstract: The role of free amino acids as solutes for cell volume regulation in marine molluscs under salinity stress is well established. Under hypoosmotic stress the intracellular concentrations of amino acids decrease by extrusion from the cells, followed by deamination and/or excretion. However, no uncontroversial evidence is available about mechanisms involved in the enlargement of the free amino acid pool during hyperosmotic stress.Since anaerobic metabolism in bivalves can result in the accumulation of the amino … Show more

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Cited by 97 publications
(52 citation statements)
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“…Furthermore, metabolism of Ala, Phe and Tyr is involved in energy regulation, biomineralization and byssus production in marine calcifiers, respectively (Ellis et al, 2014;Evans et al, 2013;Reddy and Yang, 2015;Yu et al, 2014). Free amino acids are critical for regulating cellular osmotic equilibrium in calcifiers (Zurburg and De Zwaan, 1981). Therefore, the depression of amino acid metabolism in M. edulis may negatively affect energy metabolism, biomineralization and osmoregulation.…”
Section: Discussionmentioning
confidence: 99%
“…Furthermore, metabolism of Ala, Phe and Tyr is involved in energy regulation, biomineralization and byssus production in marine calcifiers, respectively (Ellis et al, 2014;Evans et al, 2013;Reddy and Yang, 2015;Yu et al, 2014). Free amino acids are critical for regulating cellular osmotic equilibrium in calcifiers (Zurburg and De Zwaan, 1981). Therefore, the depression of amino acid metabolism in M. edulis may negatively affect energy metabolism, biomineralization and osmoregulation.…”
Section: Discussionmentioning
confidence: 99%
“…But shell valve adduction (preventing influxes) and haemolymph acidosis (promoting toxic NH3 effluxes) may not be the only means by which Mytilus edulis resists the stresses of high ambient ammonia. The species is able to respire anaerobically and this favours direct ammonia fixation which leads to the synthesis of some amino acids (Zurburg & Zwaan 1981, Demers & Guderley 1994, thereby preventing a high ammonia accumulation. Here, measurable increases in haemolymph NPS levels were found in all groups exposed to ammoniaenriched media (Fig.…”
Section: Discussionmentioning
confidence: 99%
“…The latter fact evokes its functionality in the osmorregulation processes of individuals (Zurburg and de Zwaan 1981). All of the demonstrated taurine synthesis pathways in invertebrate tissues incorporate cysteine (Bishop et al 1983;Huxtable 1992), and intertidal molluscs were described to utilise external cysteine sources to maintain taurine pools (Allen and Garret 1972).…”
Section: Introductionmentioning
confidence: 99%