Plant Growth Regulation

, Volume 8, Issue 3, pp 215–223 | Cite as

Identification of indole-3-butyric acid as an endogenous constituent of maize kernels and leaves

  • Ephraim Epstein
  • Kai-Hsien Chen
  • Jerry D. Cohen


Indole-3-butyric acid (IBA) was identified by thin layer chromatography, gas-liquid chromatography and gas chromatography-mass spectrometry in kernels and leaves of corn (Zea mays) var. Hazera 224. Free and ester conjugated IBA were present in dry and germinating corn kernels and leaves. This is the first report of IBA in a monocotyledonous plant and, as far as we know, the first evidence for the presence of conjugated IBA.

Key words

IAA IBA conjugated IBA rooting Zea mays 


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Copyright information

© Kluwer Academic Publishers 1989

Authors and Affiliations

  • Ephraim Epstein
    • 1
  • Kai-Hsien Chen
    • 2
  • Jerry D. Cohen
    • 3
  1. 1.ARO, The Volcani CenterBet DaganIsrael
  2. 2.Department of BotanyUniversity of MarylandCollege ParkUSA
  3. 3.USDA-ARS Plant Hormone LaboratoryBeltsville Agricultural Research CenterBeltsvilleUSA

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