The botanical magazine = Shokubutsu-gaku-zasshi

, Volume 99, Issue 3, pp 301–308 | Cite as

Formation of the nuclear envelope during mitotic anaphase inSpirogyra

  • Katsumi Ueda
  • Paradugu Abhayavardhani
  • Tetsuko Noguchi


The formation of the nuclear envelope in the mitosis ofSpirogyra was studied with an electron microscope. The nuclear envelope was disrupted around the spindle equator in the metaphase. Many small vesicles were observed in the metaphase spindle. These vesicles surrounded the masses of chromosomes and nucleolar substance in the early anaphase, and they fused with each other to form daughter nuclear envelopes during the early anaphase. The formation of new envelopes from small vesicles at such an early mitotic anaphase is reported here for the first time. The possible origin of these vesicles is also discussed.

Key words

Mitosis Nuclear envelope Spirogyra 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Dawes, C.J. 1965. An ultrastructure study ofSpirogyra. J. Phycol.1: 121–127.Google Scholar
  2. Dylewski, D.P., J.P. Braselton andC.E. Miller 1978. Cruciform nuclear division inSorosphaera veronicae. Amer. J. Bot.65: 258–267.CrossRefGoogle Scholar
  3. Fowke, L.C. andJ.D. Pickett-Heaps. 1969. Cell division inSpirogyra. 1. Mitosis. J. Phycol.5: 240–259.Google Scholar
  4. Fuller, M.S. 1967. Mitosis in fungi. Int. Rev. Cytol.45: 113–153.Google Scholar
  5. Godward, M.B.E. andE.G. Jordan 1965. Electron microscopy of the nucleolus ofSpirogyra britannica andSpirogyra ellipsospora. J. Royal Microscop. Soc.84: 347–360.Google Scholar
  6. Heath, I.B. 1980. Variant mitoses in lower eukaryotes: Indicators of the evolution of mitosis. Int. Rev. Cytol.64: 1–70.Google Scholar
  7. Hepler, P.K. andS.M. Wolniak. 1984. Membranes in the mitotic apparatus: their structure and function. Int. Rev. Cytol.90: 169–238.PubMedGoogle Scholar
  8. Jenkins, R.A. 1967. Fine structure of division in ciliate protozoa. 1. Micronuclear mitosis inBlepharisma. J. Cell Biol.34: 463–481.PubMedCrossRefGoogle Scholar
  9. Kubai, D.F. 1975. The evolution of the mitotic spindle. Int. Rev. Cytol.43: 167–227.PubMedCrossRefGoogle Scholar
  10. Pickett-Heaps, J.D. 1974. The evolution of mitosis and the eukaryotic condition. BioSystems6: 37–48.PubMedCrossRefGoogle Scholar
  11. Porter, K.R. andR.D. Machado. 1960. Studies on the endoplasmic reticulum. IV. Its form and distribution during mitosis in cells of onion root tip. J. Biophys. Biochem. Cytol.7: 167–180.PubMedCrossRefGoogle Scholar
  12. Raikov, I.B. 1973. Mitose intranucleaire acentrique du micronoyan deLoxodes magnus, Cilie, Holotriche. Etude ultrastucturale. C.R. Acad. Sci. Ser. D276: 2385–2393.Google Scholar
  13. Suganuma, Y. 1969. Electron microscope studies on the mitosis of binary fission of micronucleus of the ciliate,Urostyla. J. Nara Med. Assoc.20: 323–335.Google Scholar
  14. Tutumi, T. andK. Ueda. 1975. A cytochemical study on polysaccharides in cells ofMicrasterias americana. Cytologia40: 113–118.Google Scholar
  15. Ueda, K. 1972. Electron microscopical observations on nuclear division inMicrasterias americana. Bot. Mag. Tokyo85: 263–271.CrossRefGoogle Scholar

Copyright information

© The Botanical Society of Japan 1986

Authors and Affiliations

  • Katsumi Ueda
    • 1
  • Paradugu Abhayavardhani
    • 1
  • Tetsuko Noguchi
    • 1
  1. 1.Biological LaboratoryWomen's UniversityNara

Personalised recommendations