Electron Microscopic Observations of Dividing Somatic Nuclei in Saprolegnia

Abstract

SUMMARY: An intranuclear spindle of about 40 microtubular fibrils, 200 Å in diameter, convergent to poles close to the inner membrane, with attendant centrioles external to the nuclear envelope, has been identified in sections of synchronously dividing nuclei in vegetative hyphae of Saprolegnia ferax.