• L. J. Audus
  • J. C. Whish


The experiments we are about to describe started1 as a new approach to an old problem—the mechanism of gravity perception in plants. All higher plants are sensitive to gravity; indeed the oriented growth of organs such as roots, shoots, and leaves is governed primarily by it. If a plant organ is by any means displaced from its normal direction of growth, certain regions of the organ sensitive to gravity will perceive the change and then, by a hormone-mediated mechanism, will induce one side of the organ to grow faster than the other, producing a curvature tending to restore the normal orientation to the growing part of the organ. The sensitive areas are usually the extreme apical regions.


Helianthus Annuus Avena Sativa Magnetic Gradient Pole Piece Protoplasmic Streaming 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    Audus, L. J., “Magnetotropism, a New Plant Growth Response,” Nature (London) 185:132, 1960.CrossRefGoogle Scholar
  2. 2.
    Audus, L. J., “The Mechanism of the Perception of Gravity by Plants,” Symposium XVI, Soc. Exptl. Biol., p. 197, 1962.Google Scholar
  3. 3.
    Leusden, F. P., “Electric and Magnetic Effects on Bacteria,” Centr. Bakter. 111:321, 1929.Google Scholar
  4. 4.
    Jennison, M. W., “The Growth of Bacteria, Yeasts and Moulds in a Strong Magnetic Field,” J. Bacteriol. 33:15, 1937.Google Scholar
  5. 5.
    Kimball, G. C., “The Growth of Yeast in a Magnetic Field,” J. Bacteriol. 35:109, 1938.Google Scholar
  6. 6.
    Magrou, J., and P. Manigault, “Action of a Magnetic Field on the Development of Experimental Tumours in Pelargonium zonale,” Compt. rend. acad. sci. 223:8, 1946.Google Scholar
  7. 7.
    Ssawostin, P. W., “Magnetophysiological Studies: I. The Rotation Movement of the Plasma in a Constant Magnetic Field,” Planta 11:683, 1930.CrossRefGoogle Scholar
  8. 8.
    Ewart, A. J., On the Physics and Physiology of Protoplasmic Streaming in Plants, Clarendon Press, Oxford, 1903.Google Scholar
  9. 9.
    Ssawostin, P. W., “Magnetic Growth Reactions in Plants,” Planta 12:327, 1930.CrossRefGoogle Scholar
  10. 10.
    Bayliss, J. S., “On the Galvanotropism of Roots,” Ann. Botany 21:403, 1907.Google Scholar
  11. 11.
    Murphy, J. B., “The Influence of Magnetic Fields on Seed Germination,” Am. J. Botany 29:15 (Suppl.), 1942.CrossRefGoogle Scholar
  12. 12.
    Krylov, A. V., and G. A. Tarakanova, “Magnetotropism in Plants and Its Nature,” Fiziol. Rastenii 7:191, 1960.Google Scholar
  13. 13.
    Krylov, A. V., “Magnetotropism in Plants,” Bull. Acad. Sci. U.S.S.R., Biol. Ser., p. 221, 1961.Google Scholar

Copyright information

© Plenum Press 1964

Authors and Affiliations

  • L. J. Audus
    • 1
  • J. C. Whish
    • 1
  1. 1.Bedford CollegeLondon UniversityEngland

Personalised recommendations