Spermatogenesis in bombyx mori. I. The canal system joining sister spermatocytes

Journal of Morphology - Tập 134 Số 1 - Trang 47-55 - 1971
Robert C. King1,2, Hiromu Akai1,2
1Department of Biological Sciences, Northwestern University, Evanston, Illinois 60201
2Sericultural Experiment Station, Ministry of Agriculture and Forestry, 3-55-30 Wada, Suginami-ku, Tokyo 166, Japan

Tóm tắt

AbstractAn electron microscopic investigation was made of the origin and morphology of the canal system that connects sister spermatocytes of larval Bombyx mori. Canal formation results from incomplete cleavages during the mitoses which immediately precede meiosis. We suggest the lip which surrounds each canal is derived from the contractile ring which is prevented from constricting completely by interaction with the midbody. Cells were found with as many as four canals which demonstrates that canal rims can persist through a number of mitotic cycles. Speculations are advanced as to the significance of these canals in restricting gonocytes from unlimited divisions.

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Journal of Morphology

Tập 134 Số 1

47-55

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