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Selective resorption in nutritive phagocytes of the sea urchin Anthocidaris crassispina

Published online by Cambridge University Press:  24 May 2004

Arkadiy A. Reunov ,
Alexander V. Kalachev ,
Olga V. Yurchenko  and
Doris W.T. Au
Arkadiy A. Reunov
Affiliation:
Institute of Marine Biology, Far East Branch of the Russian Academy of Sciences, 17 Palchevsky St, 690041 Vladivostok, Russia.
Alexander V. Kalachev
Affiliation:
Institute of Marine Biology, Far East Branch of the Russian Academy of Sciences, 17 Palchevsky St, 690041 Vladivostok, Russia.
Olga V. Yurchenko
Affiliation:
Institute of Marine Biology, Far East Branch of the Russian Academy of Sciences, 17 Palchevsky St, 690041 Vladivostok, Russia.
Doris W.T. Au
Affiliation:
Department of Biology and Chemistry, City University of Hong Kong, 83 Tat Chee Ave, Kowloon, Hong Kong.
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Abstract

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Phagocytic resorption during spermatogenesis was studied in the sea urchin Anthocidaris crassispina. Nutritive phagocytes in gonad absorbed both waste sperm cells and residual bodies discarded from maturing spermatids, and these materials were subsequently compartmented in heterophagosomes. Based on 180 heterophagosomes examined by transmission electron microscopy, over 99% of heterophagosomes contained either residual bodies or sperm cells only. Simultaneous resorption of sperm cells and residual bodies in a heterophagosome was uncommon, with only ∼0.56% occurrence, suggesting that heterophagosomes have a selective resorption ability in nutritive phagocytes.

Keywords

Sea urchinSpermResidual bodyResorptionUltrastructure
Type
Research Article
Information
Zygote , Volume 12 , Issue 1 , February 2004 , pp. 71 - 73
Copyright
2004 Cambridge University Press