1983
DOI: 10.1002/jez.1402270203
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Calcium concretions in the gills of a freshwater mussel serve as a calcium reservoir during periods of hypoxia

Abstract: The gill of the freshwater mussel, Ligumia subrostrata, is composed of 25% calcium concretions on a dry weight basis. These concretions are located extracellularly in the connective tissue of the gill. The concretions have a lamellar structure and occur singly, multiply, and in clumps. The concretions are composed primarily of calcium phosphate and an organic matrix. The concretions are more numerous toward the base of the gill and less frequent in the tip of the gill. The average size of the concretions is 2-… Show more

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Cited by 68 publications
(20 citation statements)
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“…membranes, MRG) and a supernatant (S1) containing the cytosol. MRG were isolated from P1 through digestion of tissue fragments with NaOH and centrifugation at 5000 × g (P2) (Silverman et al 1983). The resulting supernatant (S2) contained metal associated with dissolved tissues (Wallace et al 1998).…”
Section: Methodsmentioning
confidence: 99%
“…membranes, MRG) and a supernatant (S1) containing the cytosol. MRG were isolated from P1 through digestion of tissue fragments with NaOH and centrifugation at 5000 × g (P2) (Silverman et al 1983). The resulting supernatant (S2) contained metal associated with dissolved tissues (Wallace et al 1998).…”
Section: Methodsmentioning
confidence: 99%
“…Supernatants were combined with previously collected dissolved cellular debris. The remaining pellets, containing exoskeleton and other 'insoluble' components, were collected (Silverman et al 1983.…”
Section: Methodsmentioning
confidence: 99%
“…Calcium concretions were isolated from the separate organs, essentially after Silverman et al (1983). Lyophilized tissues were homogenized in a small amount of distilled water with an Ultra-Turrax homogenizer.…”
Section: Isolation Of Calcium Concretionsmentioning
confidence: 99%
“…5), the latter element supposedly occurring in the form of (pyro)phosphate (Silverman et al, 1983). On a weight basis calcium makes up about one third of the concretion material (Table III).…”
Section: Granule Compositionmentioning
confidence: 99%