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Titolo:
cAMP and sodium transport in the freshwater crayfish, Cherax destructor
Autore:
Mo, JL; Greenaway, P;
Indirizzi:
Univ New S Wales, Sch Biol Sci, Sydney, NSW 2052, Australia Univ New S Wales Sydney NSW Australia 2052 i, Sydney, NSW 2052, Australia
Titolo Testata:
COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY A-MOLECULAR AND INTEGRATIVE PHYSIOLOGY
fascicolo: 4, volume: 129, anno: 2001,
pagine: 843 - 849
SICI:
1095-6433(200107)129:4<843:CASTIT>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
CRAB ERIOCHEIR-SINENSIS; CARCINUS-MAENAS L; CHINESE CRAB; CYCLIC-AMP; CALLINECTES-SAPIDUS; GILL NA,K-ATPASE; DEPENDENT ATPASE; POSTERIOR GILLS; ION-TRANSPORT; GREEN CRAB;
Keywords:
crustacea; Cherax; freshwater; cAMP; Na+-K+-ATPase; sodium regulation; hormonal control; ion transport;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Greenaway, P Univ New S Wales, Sch Biol Sci, Sydney, NSW 2052, Australia Univ New S Wales Sydney NSW Australia 2052 W 2052, Australia
Citazione:
J.L. Mo e P. Greenaway, "cAMP and sodium transport in the freshwater crayfish, Cherax destructor", COMP BIOC A, 129(4), 2001, pp. 843-849

Abstract

Crayfish in which sodium absorption was maximally stimulated had elevated levels of both cAMP and Na+-K+-ATPase activity in gill tissue. The concentration of cAMP and activity of Na+-K+-ATPase in gill tissue were monitored following transfer of crayfish from water containing 125 mmol.l(-1) Na to Na-free media. Both parameters were significantly elevated within 10 min of transfer to Na-free media and [cAMP] peaked between 1 and 2 h before fallingtransiently to the control level at 3 h. A second peak of [cAMP] and a further rise in Na+-K+-ATPase activity were evident 6 h after transfer and elevated levels were then maintained. The pattern observed was consistent withthe existence of two separate mechanisms for the control of sodium absorption both of which stimulated the activity of Na+-K+-ATPase via elevation ofthe intracellular concentration of cAMP. The initial response was very rapid (< 10 min) but of brief duration (1-2 h) and this mechanism appeared to be sensitive to changes in external ion levels. The second mechanism exhibited a much longer response time (3-6 h) and duration and was likely to be sensitive to changes in internal ion concentrations. (C) 2001 Elsevier Science Inc. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/12/20 alle ore 00:59:40