Cell Division in Spirogyra. Ii. Cytokinesis.

  title={Cell Division in Spirogyra. Ii. Cytokinesis.},
  author={Larry C. Fowke and Jeremy D. Pickett-Heaps},
  journal={Journal of phycology},
  volume={5 4},
Cytokinesis in cells of Spirogyra sp. was studied with both light and electron microscopes. Early formation of the cross wall was achieved by annular ingrowth of a septum; the cross wall was completed by a phragmoplast containing Golgi vesicles, longitudinally aligned microtubules, and associated electron-dense material. Spirogyra may represent an intermediate stage in the evolution of the phragmoplast seen in higher plants. 

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