Cytokinesis: Furrowing activity in nucleated endoplasmic fragments of fertilized sand dollar eggs
✍ Scribed by Rappaport, R.
- Book ID
- 102890363
- Publisher
- John Wiley and Sons
- Year
- 1983
- Tongue
- English
- Weight
- 692 KB
- Volume
- 227
- Category
- Article
- ISSN
- 0022-104X
No coin nor oath required. For personal study only.
✦ Synopsis
When the sand dollar egg surface is extensively disrupted by contact with an expanding oil drop, and the egg contents are squeezed out by mechanical pressure, the denuded endoplasm is rapidly covered by a new surface. The original egg surface alters its appearance as the area that it covers diminishes, and the original and the new surfaces become different in appearance and behavior. If a mitotic apparatus is pushed into the endoplasmic fragment, the fragment surface undergoes furrowing activity, which is synchronous with typical cyclical changes in the appearance of the mitotic apparatus. In this circumstance, furrows develop later and progress more slowly than normal. Furrows formed soon after the operation usually regress, but those developing in conjunction with subsequent cell cycles are more nearly normal and are frequently permanent.