caa a22 4500 469082860 CHVBK 20180323132955.0 cr unu---uuuuu 170328e19920201xx s 000 0 eng 10.1007/BF00302969 doi (NATIONALLICENCE)springer-10.1007/BF00302969 Evidence for calcium translocation in catch connective tissue of the sea cucumber Stichopus chloronotus [Elektronische Daten] [Akira Matsuno, Tatsuo Motokawa] Summary: Catch connective tissue is collagenous connective tissue that changes its mechanical properties rapidly. Calcium has been assumed to play a key role in the catch mechanism because calcium concentration profoundly affects the mechanical properties. We have found a calcium-storage cell, the vacuole cell, in the dermis of the sea cucumber Stichopus chloronotus a wellstudied catch connective tissue. The processes of this cell are packed with vacuoles measuring 0.1-1.5 μm in diameter. The ultrastructure was compared in a relaxed state and in a catch (stiff) state induced by high-potassium artificial sea water. When fixed with pyroantimonate, the vacuoles contained precipitates in the relaxed state but not in the catch state. Analysis with an energy-dispersive X-ray microanalyzer suggested that the precipitate contains calcium. The release of calcium ions from the vacuole cell is proposed to induce connective tissue catch. Springer-Verlag, 1992 Catch connective tissue nationallicence Calcium, localization nationallicence Vacuole cell nationallicence Dermis nationallicence Sea cucumber nationallicence Stichopus chloronotus (Echinodermata) nationallicence Matsuno Akira Department of Biology, Shimane University, Nishikawazu, 690, Matsue, Japan aut Motokawa Tatsuo Biological Laboratory, Faculty of Science, Tokyo Institute of Technology, O-okayama, Meguro, 152, Tokyo, Japan aut Cell and Tissue Research Springer-Verlag 267/2(1992-02-01), 307-312 0302-766X 267:2<307 1992 267 441 https://doi.org/10.1007/BF00302969 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00302969 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Matsuno Akira Department of Biology, Shimane University, Nishikawazu, 690, Matsue, Japan aut NATIONALLICENCE 700 1- Motokawa Tatsuo Biological Laboratory, Faculty of Science, Tokyo Institute of Technology, O-okayama, Meguro, 152, Tokyo, Japan aut NATIONALLICENCE 773 0- Cell and Tissue Research Springer-Verlag 267/2(1992-02-01), 307-312 0302-766X 267:2<307 1992 267 441 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer