Ultrastructural Study of Endogenous Energy Substrates in Spermatozoa of the Sea Urchins Arbacia lixula and Paracentrotus lividus
スポンサーリンク
概要
- 論文の詳細を見る
Spermatozoa of the sea urchins, Arbacia lixula and Paracentrotus lividus, use endogenous triglyceride (TG)and phosphatidylcholine (PC), respectively, to produce energy for swimming. The present study examined ultrastructurally the location of TG and PC available for utilization in energy metabolism in spermatozoa of these species. The A. lixula spermatozoon contained several lipid globules in the midpiece proximally from the head. After incubation with seawater, TG levels decreased and morphological changes in the lipid globules were observed. Some lipid globules lost their smooth spherical shape, and their surface became irregular and uneven. Vacuoles of various sizes and forms also appeared near the lipid globules. In contrast, P. lividus spermatozoa possessed lipid bodies, instead of lipid globules, in the space between the mitochondrial outer and inner membranes. After incubation with seawater, the lipid bodies became small and finally disappeared, coincident with a decrease in the level of PC. These results strongly suggest that TG and PC, as endogenous substrates providing energy for motility, are stored in the lipid globules of A. lixula spermatozoa and the lipid bodies of P. lividus spermatozoa, respectively.
- 社団法人日本動物学会の論文
- 1994-10-15
著者
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KIKUYAMA Sakae
Department of Biology, School of Education, Waseda University
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Kikuyama Sakae
Department Of Biology Faculty Of Science Shizuoka University
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NAKAMURA Masaru
Department of Computer Science and Engineering, Nagoya Institute of Technology
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Mita Masatoshi
Teikyo Junior College
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Oguchi Atsuko
Department of Biology, School of Education, Waseda University
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Santis De
Department Of Cell Biology Stazione Zoologica `anton Dohrn'
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Oguchi A
Waseda Univ. Tokyo Jpn
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Oguchi Atsuko
Department Of Biology School Of Education Waseda University
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Nakamura Masaru
Department Of Computer Science And Engineering Nagoya Institute Of Technology
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Nakamura Masaru
Department Of Basic Life Science Faculty Of Medicine Teikyo University
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Nakamura Masaru
Department Of Applied Chemistry Faculty Of Science And Engineering Kinki University
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