Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/37846
標題: Effects of environmental Cl- levels on Cl- uptake and mitochondria-rich cell morphology in gills of the stenohaline goldfish, Carassius auratus
作者: Chang, I.C.
李宗翰
Lee, T.H.
Wu, H.C.
Hwang, P.P.
關鍵字: mitochondria-rich cells
apical surface
chloride
uptake
tilapia oreochromis-mossambicus
acid-base regulation
intracellular ion
concentrations
branchial epithelial-cells
trout oncorhynchus-mykiss
fresh-water teleosts
salmo-trutta l
na-k-atpase
chloride cell
rainbow-trout
期刊/報告no:: Zoological Studies, Volume 41, Issue 3, Page(s) 236-243.
摘要: The objective of the present study was to examine the correlation between morphological changes in gill MR cells and modulations in Cl- uptake in a stenolhaline teleost. Goldfish (Carassius auratus) were acclimated to high-Cl and low-Cl artificial freshwater for 1 wk, and then the numbers of gill MR cells with different morphologies as well as whole-body Cl- influx were measured. Based on the size and ultrastructural features of the apical surface, gill MR cells in goldfish were classified into types 1, 11, and III. Type III MR cells display the largest apical dimension (6-9 mum); type II MR cells are of intermediate size (3-6 mum); while type I MR cells are the smallest (1-3 mum). Comparing the morphological and flux data, a positive correlation exists between enhanced Cl- influx and the appearances of type III MR cells in the low-Cl group. In contrast, fish exposed to high-Cl developed type I MR cells (1-3 pm) in the gills and showed a reduced Cl- influx. These results suggest that MR cells expand their apical surface to enhance their capacity for Cl- uptake. http://www.sinica.edu.tw/zool/zoolstud/41.3/236.pdf.
URI: http://hdl.handle.net/11455/37846
ISSN: 1021-5506
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