Rapid morphological oscillation of mitochondrion-rich cell in estuarine mudskipper following salinity changes

Tatsuya Sakamoto, Shigefumi Yokota, Masaaki Ando

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Morphological changes in the chloride cells or mitochondrion-rich (MR) cells in the skin under the pectoral fin of the estuarine mudskipper (Periophthalmus modestus) were examined in relation to intertidal salinity oscillation in river mouth. MR cells were distinguished between those in contact with the water (cells labeled with both mitochondrial probe DASPEI and Concanavalin-A, an apical surface marker of MR cells) and those that are not (DASPEI-positive only). After transfer of the fish from seawater to freshwater, no difference in the total MR cell density was observed, but the subpopulation of MR cells that are Concanavalin-A-positive decreased dramatically within 30 min. After 6 hr in freshwater, the fish were returned to seawater; the number of Con-A-positive MR cells increased to the initial levels rapidly. Thus, in seawater, mudskippers seem to open the apical crypts of the MR cells to secrete salt; in freshwater, they close the crypt of the MR cells tentatively, and tolerate hypotonicity until the rising tide. This unique response of chloride cells may also be seen in gills of other estuarine species. (C) 2000 Wiley-Liss, Inc.

Original languageEnglish
Pages (from-to)666-669
Number of pages4
JournalJournal of Experimental Zoology
Volume286
Issue number6
DOIs
Publication statusPublished - May 1 2000
Externally publishedYes

ASJC Scopus subject areas

  • Animal Science and Zoology

Fingerprint Dive into the research topics of 'Rapid morphological oscillation of mitochondrion-rich cell in estuarine mudskipper following salinity changes'. Together they form a unique fingerprint.

  • Cite this