caa a22 4500 477117058 CHVBK 20180405111625.0 cr unu---uuuuu 170330e19961201xx s 000 0 eng 10.1007/BF01874924 doi (NATIONALLICENCE)springer-10.1007/BF01874924 Mitochondria-rich cells in the branchial epithelium of the teleost, Oreochromis mossambicus , acclimated to various hypotonic environments [Elektronische Daten] [Tsung-Han Lee, Pung-Pung Hwang, Hui-Chen Lin, Fore-Lien Huang] Branchial mitochondria-rich (MR) cells were examined on the afferent side of gill filaments in tilapia (Oreochromis mossambicus) acclimated to different hypotonic environments, local fresh water (LFW), hard fresh water (HFW) and 5‰ salt water (SW). Scanning electron micrographs (SEM) identified three types of apical surfaces of the MR cells, wavy convex, shallow basin and deep hole. In spite of the different types of apical surfaces, light microscopic (LM) and transmission electron microscopic (TEM) studies suggested that these cells were MR cells. The relative abundance of these 3 types of branchial MR cells varied with external hypotonic milieus. Wavy-convexed MR cells were dominant in the gills of fish adapted to HFW, whereas shallow-basined MR cells were evident in LFW-adapted fish. In SW-adapted fish, most of the MR cells were deep holes. Experiments on adaptation to various hypotonic milieus revealed that the changes of the branchial MR cells were reversible and occurred within 24 hours following transfer. The morphological alterations of the MR cells correlated with ionic changes in different milieus, indicating that these distinct types of MR cells may play key roles for osmoregulation in hypotonic media. Kugler Publication bv Amsterdam, 1996 tilapia nationallicence gill nationallicence mitochondria-rich cells nationallicence hypotonic environments nationallicence Oreochromis mossambicus nationallicence Lee Tsung-Han Department of Zoology, National Taiwan University, 107, Taipei, Taiwan, Republic of China aut Hwang Pung-Pung Institute of Zoology, Academia Sinica, 115, Taipei, Taiwan Republic of China aut Lin Hui-Chen Department of Biology, Tunghai University, 407, Taichung, Taiwan Republic of China aut Huang Fore-Lien Department of Zoology, National Taiwan University, 107, Taipei, Taiwan, Republic of China aut Fish Physiology and Biochemistry Kluwer Academic Publishers 15/6(1996-12-01), 513-523 0920-1742 15:6<513 1996 15 10695 https://doi.org/10.1007/BF01874924 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01874924 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lee Tsung-Han Department of Zoology, National Taiwan University, 107, Taipei, Taiwan, Republic of China aut NATIONALLICENCE 700 1- Hwang Pung-Pung Institute of Zoology, Academia Sinica, 115, Taipei, Taiwan Republic of China aut NATIONALLICENCE 700 1- Lin Hui-Chen Department of Biology, Tunghai University, 407, Taichung, Taiwan Republic of China aut NATIONALLICENCE 700 1- Huang Fore-Lien Department of Zoology, National Taiwan University, 107, Taipei, Taiwan, Republic of China aut NATIONALLICENCE 773 0- Fish Physiology and Biochemistry Kluwer Academic Publishers 15/6(1996-12-01), 513-523 0920-1742 15:6<513 1996 15 10695 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer