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Titolo:
Metamorphosis in the summer flounder Paralichthys dentatus: Changes in gill mitochondria-rich cells
Autore:
Schreiber, AM; Specker, JL;
Indirizzi:
Univ Rhode Isl, Grad Sch Oceanog, Narragansett, RI 02882 USA Univ Rhode Isl Narragansett RI USA 02882 anog, Narragansett, RI 02882 USA Univ Rhode Isl, Dept Biol Sci, Kingston, RI 02881 USA Univ Rhode Isl Kingston RI USA 02881 ept Biol Sci, Kingston, RI 02881 USA
Titolo Testata:
JOURNAL OF EXPERIMENTAL BIOLOGY
fascicolo: 18, volume: 202, anno: 1999,
pagine: 2475 - 2484
SICI:
0022-0949(199909)202:18<2475:MITSFP>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Soggetto:
TILAPIA OREOCHROMIS-MOSSAMBICUS; YOLK-SAC MEMBRANE; CHLORIDE CELLS; FRESH-WATER; RAINBOW-TROUT; SEAWATER ADAPTATION; EURYHALINE TELEOST; SALMO-GAIRDNERI; CHUM SALMON; SALINITY;
Keywords:
chloride cell; mitochondria-rich cell; metamorphosis; osmoregulation; flounder; Paralichthys dentatus;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
49
Recensione:
Indirizzi per estratti:
Indirizzo: Specker, JL Univ Rhode Isl, Grad Sch Oceanog, Box 14,S Ferry Rd, Narragansett, RI 02882 USA Univ Rhode Isl Box 14,S Ferry Rd Narragansett RI USA 02882 USA
Citazione:
A.M. Schreiber e J.L. Specker, "Metamorphosis in the summer flounder Paralichthys dentatus: Changes in gill mitochondria-rich cells", J EXP BIOL, 202(18), 1999, pp. 2475-2484

Abstract

Salinity tolerance changes during larval development and metamorphosis in the summer flounder (Paralichthys dentatus) and other teleosts. The physiological mechanisms responsible for osmoregulation during these early stages of development are not well understood. This study characterized changes inultrastructure, intracellular membranes and immunoreactive Na+/K+-ATPase of mitochondria-rich cells (MRCs) in the gills of summer flounder during metamorphosis. Gill ultrastructure at the start of metamorphosis revealed onlyone type of MRC, which had weak reactivity to osmium and lacked a well-defined apical pit. In juveniles, two types of MRCs were observed: light-staining MRCs (LMRCs) with weak reactivity to osmium, and dark-staining MRCs (DMRCs) with strong reactivity to osmium and positioned adjacent to LMRCs. Compared with MRCs at the start of metamorphosis, the mitochondria of juvenileMRCs appeared smaller, with more transverse cristae and electron-dense matrices. Changes in MRCs during metamorphosis were also accompanied by increased immunoreactive Na+/K+-ATPase. These findings suggest that gill MRCs develop during the metamorphosis of summer flounder as the gill takes on an increasingly important osmoregulatory role.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/11/20 alle ore 04:45:30