Advertisement

Springer Nature is making SARS-CoV-2 and COVID-19 research free. View research | View latest news | Sign up for updates

Versuch einer Kausalanalyse der geotropischen Reaktionskette im Chara-Rhizoid

An attempt at a causal analysis of the geotropical reaction chain in the Chara rhizoid

Summary

In the initial phase of the geotropical reaction of the Chara rhizoid the growth difference postulated by Sievers (1967c) between the physically upper, slightly subapical flank and the lower one is demonstrated. In horizontal exposure the growth of the extreme cell apex is continued, while the growth of the lower flank is inhibited and that of the upper one is promoted. In the end phase the cell apex shows a damped oscillation until it finally reaches the vertical growth direction. The statoliths follow the oscillating growth of the cell tip from one flank to the opposite one until they are statistically equally redistributed in their normal position.—In vertical exposure under reduced turgor pressure the statoliths fall down into the extreme cell apex, where they inhibit the growth of this part of the cell wall, while the subapical wall grows transversally.—It is concluded that the statoliths inhibit the growth of the cell wall area which they cover.—The physical phase of the reaction chain, the susception, is the gravity-induced downward displacement of the statoliths. The physiological phase starts with the diversion of the acropetal transport of the Golgi vesicles to the upper part of the cell, which is caused by the block of statoliths (perception). The greater rate of vesicle incorporation into the upper flank in comparison to the lower one causes the subapical growth difference which results in the curvature (reaction).—In the case of the Chara rhizoid Golgi- and statolith-apparatus function as a self-regulating cellular system.

This is a preview of subscription content, log in to check access.

Literatur

  1. Buder, J.: Der Geotropismus der Characeenrhizoide. Ber. dtsch. bot. Ges. 74, (14)-(23) (1961).

  2. Giesenhagen, K.: Über innere Vorgänge bei der geotropischen Krümmung der Wurzeln von Chara. Ber. dtsch. bot. Ges. 19, 277–285 (1901).

  3. Green, P.B.: Anion exchange resin spheres as marking material for wet cell surfaces. Exp. Cell Res. 40, 195–196 (1965).

  4. Kiermayer, O., Jarosch, H.: Die Formbildung von Micrasterias rotata und ihre experimentelle Beeinflussung. Protoplasma (Wien) 54, 382–420 (1962).

  5. Reinhardt, M. O.: Das Wachsthum der Pilzhyphen. Ein Beitrag zur Kenntniss des Flächenwachsthums vegetabilischer Zellmembranen. Jb. wiss. Bot. 23, 479–566 (1892).

  6. Schnepf, E.: Sekretion und Exkretion bei Pflanzen. Protoplasmatologia VIII, 8, Wien — New York: Springer 1969.

  7. Schröder, H.: Zur Statolithentheorie des Geotropismus. Beih. bot. Cbl. 16, 269–288 (1904).

  8. Schröter, K., Sievers, A.: Wirkung der Turgorreduktion auf den Golgi-Apparat und die Bildung der Zellwand bei Wurzelhaaren. Protoplasma (Wien) im Druck (1971).

  9. Sievers, A.: Elektronenmikroskopische Untersuchungen zur geotropischen Reaktion. I. Über Besonderheiten im Feinbau der Rhizoide von Chara foetida. Z. Pflanzenphysiol. 53, 193–213 (1965).

  10. —: Elektronenmikroskopische Untersuchungen zur geotropischen Reaktion. II. Die polare Organisation des normal wachsenden Rhizoids von Chara foetida. Protoplasma (Wien) 64, 225–253 (1967a).

  11. —: Zum Wirkungsmechanismus der Statolithen in der pflanzlichen Zelle. Naturwissenschaften 54, 252–253 (1967b).

  12. —: Elektronenmikroskopische Untersuchungen zur geotropischen Reaktion. III. Die transversale Polarisierung der Rhizoidspitze von Chara foetida nach 5 bis 10 Minuten Horizontallage. Z. Pflanzenphysiol. 57, 462–473 (1967c).

  13. Sievers, A.: Geotropic perception in the Chara rhizoid. Abstracts, XI. International Botanical Congress, Seattle, Washington, USA, p. 199, 1969.

  14. —: Gravity receptors in lower plants. Proceedings of the Symposium on Gravity and the Organism, US Nat. Acad. Sci., M. J. Cohen and S. A. Gordon, eds. Chicago: Chicago Univ. Press in press 1970.

  15. Wilkins, M. B.: Geotropism. Ann. Rev. Plant Physiol. 17, 379–408 (1966).

Download references

Author information

Additional information

Herrn Prof. Dr. Dr. h. c. Kurt Mothes zum 70. Geburtstag.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Sievers, A., Schröter, K. Versuch einer Kausalanalyse der geotropischen Reaktionskette im Chara-Rhizoid. Planta 96, 339–353 (1971). https://doi.org/10.1007/BF00386948

Download citation