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Titolo:
Distinct seawater and freshwater types of chloride cells in killifish, Fundulus heteroclitus
Autore:
Katoh, F; Hasegawa, S; Kita, J; Takagi, Y; Kaneko, T;
Indirizzi:
Univ Tokyo, Ocean Res Inst, Tokyo 1648639, Japan Univ Tokyo Tokyo Japan 1648639 kyo, Ocean Res Inst, Tokyo 1648639, Japan Marine Ecol Res Inst, Cent Lab, Onju Ku, Chiba 2995105, Japan Marine Ecol Res Inst Chiba Japan 2995105 , Onju Ku, Chiba 2995105, Japan Univ Tokyo, Ocean Res Inst, Otsuchi Marine Res Ctr, Otsuchi, Iwate, Japan Univ Tokyo Otsuchi Iwate Japan chi Marine Res Ctr, Otsuchi, Iwate, Japan
Titolo Testata:
CANADIAN JOURNAL OF ZOOLOGY-REVUE CANADIENNE DE ZOOLOGIE
fascicolo: 5, volume: 79, anno: 2001,
pagine: 822 - 829
SICI:
0008-4301(200105)79:5<822:DSAFTO>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
TILAPIA OREOCHROMIS-MOSSAMBICUS; ADAPTED EURYHALINE TELEOST; K+-ATPASE ACTIVITY; YOLK-SAC MEMBRANE; OPERCULAR EPITHELIUM; OXYGEN-CONSUMPTION; SALINITY ACCLIMATION; WATER ACCLIMATION; GILL EPITHELIUM; ADAPTATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
53
Recensione:
Indirizzi per estratti:
Indirizzo: Katoh, F Univ Tokyo, Ocean Res Inst, Tokyo 1648639, Japan Univ Tokyo Tokyo Japan 1648639 n Res Inst, Tokyo 1648639, Japan
Citazione:
F. Katoh et al., "Distinct seawater and freshwater types of chloride cells in killifish, Fundulus heteroclitus", CAN J ZOOL, 79(5), 2001, pp. 822-829

Abstract

Physiological and morphological differences between killifish adapted to seawater (SW) and fresh water (FW) were examined with special reference to chloride cells. There was no difference in plasma osmolality between SW- andFW-adapted fish, reflecting their euryhalinity. A rich population of chloride cells was detected in whole-mount preparations of the gills and opercular membrane from SW- and FW-adapted fish. There was no difference between SW- and FW-adapted fish in gill Na+,K+-ATPase activity or oxygen-consumptionrates. The gill chloride cells were located mostly in a flat region of theafferent-vascular edge of the filaments. In both tissues, the cells were larger in FW- than in SW-adapted fish. The apical membrane of chloride cellswas invaginated to form a pit in SW-adapted fish, whereas it was flat or showed projections and was equipped with microvilli in FW-adapted fish. Chloride cells often interdigitated with neighboring accessory cells in SW-adapted fish, forming multicellular complexes. In FW-adapted fish, on the otherhand, a pair of chloride cells that were similar in size was occasionally associated to form "twin cells. " Thus, distinct SW and FW types of chloridecells were defined. Our findings suggest that SW- and FW-type chloride cells are equally active in the two environments, but exhibit different ion-transporting functions.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 03:04:20