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Zeitschrift für Naturforschung C

A Journal of Biosciences

Editor-in-Chief: Seibel, Jürgen

Editorial Board: Aigner , Achim / Boland, Wilhelm / Bornscheuer, Uwe / Hoffmann, Klaus

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1865-7125
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Volume 39, Issue 6

Issues

Pheromone-Binding and Matrix-Mediated Events in Sexual Induction of Volvox carteri

Rainer Gilles
  • Institut für Biochemie, Universität zu Köln, An der Bottmühle 2, D-5000 Köln 1, Bundesrepublik Deutschland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Claudia Gilles
  • Institut für Biochemie, Universität zu Köln, An der Bottmühle 2, D-5000 Köln 1, Bundesrepublik Deutschland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
/ Lothar Jaenicke
  • Corresponding author
  • Institut für Biochemie, Universität zu Köln, An der Bottmühle 2, D-5000 Köln 1, Bundesrepublik Deutschland
  • Other articles by this author:
  • De Gruyter OnlineGoogle Scholar
Published Online: 2014-06-02 | DOI: https://doi.org/10.1515/znc-1984-0612

Sexual differentiation of the reproductive cells (gonidia) of the green alga Volvox carteri f. nagariensis Iyengar is triggered by a glycoprotein inducer which is released into the medium by sexual male spheroids. If added, it induces the next generation cycle to become sexual. About 3000 pheromone molecules per spheroid will give full induction. Specific binding sites for the pheromone have been identified in the extracellular matrix in which characteristic events take place. Inducer binding and action are reversible for a certain time period until the start of cell division; thereafter, determination of the gonidia is final. Extent of sexual induction is proportional to the duration of inducer pulses. Inhibition of sexual induction reveals as essential extracellular components of the induction system high molecular acidic glycoproteins, cyclic nucleotides, Ca2+/calmodulin, and pheromone-controlled gene products. Low matrix levels of cyclic AMP and cyclic GMP seem to stimulate induction; high levels to inhibit.

: Volvox carteri; Sexual Induction; Extracellular Matrix; Pheromone; Cyclic Nucleotides

About the article

Received: 1984-03-07

Published Online: 2014-06-02

Published in Print: 1984-06-01


Citation Information: Zeitschrift für Naturforschung C, Volume 39, Issue 6, Pages 584–592, ISSN (Online) 1865-7125, ISSN (Print) 0939-5075, DOI: https://doi.org/10.1515/znc-1984-0612.

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© 1946 – 2014: Verlag der Zeitschrift für Naturforschung. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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[1]
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[2]
H.-W. Mages, H. Tschochner, and M. Sumper
FEBS Letters, 1988, Volume 234, Number 2, Page 407
[3]
Lothar Jaenicke, Ortrun Feldwisch, Barbara Merkl, Anja Cremer, and Ingrid G. Haas
FEBS Letters, 1993, Volume 316, Number 3, Page 257

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