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A freeze-fracture study of the nuclear envelope during spermiogenesis inMarsilea. Formation of a pore-free zone associated with the microtubule ribbon |
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| Authors: | Diana Gold Myles Darlene Southworth P. K. Hepler |
| Affiliation: | (1) Department of Biological Sciences, Stanford University, Stanford, California, USA;(2) Present address: Laboratory of Human Reproduction and Reproductive Biology, Harvard Medical School, 45 Shattuck Street, 02115 Boston, MA, USA;(3) Present address: Box 280, 96027 Etna, CA, USA;(4) Present address: Department of Botany, University of Massachusetts, 01002 Amherst, MA, USA |
| Abstract: | Summary The nuclear envelope was freeze-fractured at different stages during spermiogenesis inMarsilea. Nuclear pores were seen at all stages of development, but were excluded from a specialized region of the nuclear envelope that is in contact with the microtubule ribbon. The microtubule ribbon is associated with one edge of the nuclear envelope throughout nuclear shaping and chromatin condensation and the pore-free zone may be a region of the nuclear envelope that is important in these processes. |
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