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Electronasty and electrotropism

  • A. R. Schrank
Chapter
Part of the Handbuch der Pflanzenphysiologie / Encyclopedia of Plant Physiology book series (532, volume 17/1)

Abstract

Curvatures and movements of plant structures in response to electrical stimulation have been observed in frequent instances by a number of different investigators. If such responses are not oriented with respect to the polarity of the externally applied electrical field, they are designated as electronastic responses. Electrotropisms are the curvature responses which are dependent on the polarity of the electrical stimulation. Most, if not all, curvatures of this kind are accomplished by differential growth rates, which are dependent on the unequal distribution of auxin in the responding structure. Much of the experimental work that has been reported has been directed toward elucidating the mechanisms that may be involved in bringing about the unequal distribution of auxin. Early evidence indicates that the nature of the electrotropic responses of shoots differ from those of roots. For this reason the two will here be considered separately.

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© Springer-Verlag Berlin Heidelberg 1959

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  • A. R. Schrank

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