Root growth and gravireaction: endogenous hormone balance

  • Paul Emile Pilet
Part of the Developments in Plant and Soil Sciences book series (DPSS, volume 4)


The role originally ascribed to indolyl-3-acetic acid (IAA) in the classical hypothesis first proposed by Cholodny [1] and Went [17] has been filled — for root growth and gravireaction — by abscisic acid (ABA) which could be considered [4, 18] as one of the endogenous growth inhibitors [16] produced (at least for maize roots) by the cap cells and moving in the basipetal direction [4–8; 19, 20].


Maize Agar 


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Copyright information

© Martinus Nijhoff/Dr W. Junk Publishers, The Hague/Boston/London 1981

Authors and Affiliations

  • Paul Emile Pilet
    • 1
  1. 1.Institute of Plant Biology and Physiology of the UniversityLausanneSwitzerland

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