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|標題:||Morphology and function of gill mitochondria-rich cells in fish acclimated to different environments||作者:||Chang, I.C.
|關鍵字:||tilapia oreochromis-mossambicus;fresh-water teleosts;wheat-germ-agglutinin;na-k-atpase;chloride cell;frog-skin;hypotonic;environments;collecting duct;euryhaline fish;h+-atpase||Project:||Physiological and Biochemical Zoology||期刊/報告no：:||Physiological and Biochemical Zoology, Volume 74, Issue 1, Page(s) 111-119.||摘要:||
The objective of this study is to test the hypothesis that morphologically different mitochondria-rich (MR) cells may be responsible for the uptake of different ions in freshwater-adapted fish. Tilapia (Oreochromis mossambicus) were acclimated to high-Ca, mid-Ca, low-Ca, and low-NaCl artificial freshwater, respectively, for 2 wk. Cell densities of wavy-convex, shallow-basin, and deep-hole types of gill MR cells as well as whole-body Ca2+, Na+, and Cl- influxes were measured. Low-Ca fish developed more shallow-basin MR cells in the gills and a higher Ca2+ influx than those acclimated to other media. However, fish acclimated to low-NaCl artificial freshwater predominantly developed wavy-convex cells, and this was accompanied by the highest Na+ and Cl- influxes. Relative abundance of shallow-basin and wavy-convex MR cells appear to be associated with changes in Ca2+ and Na+/Cl- influxes, suggesting that shallow-basin and wavy-convex MR cells are mainly responsible for the uptake of Ca2+ and Na+/Cl-, respectively.
|Appears in Collections:||生命科學系所|
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