Journal of Plant Growth Regulation

, Volume 9, Issue 1–4, pp 1–6 | Cite as

A monoclonal antibody for the detection of conjugated forms of abscisic acid in plant tissues

  • P. Perata
  • P. Vernieri
  • D. Armellini
  • M. Bugnoli
  • R. Presenting
  • P. Picciarelli
  • A. Alpi
  • F. Tognoni
Article

Abstract

A mouse monoclonal antibody against abscisic acid (ABA) was produced and characterized. It was raised using ABA conjugated to the carrier protein through the carboxyl (Cl) group as immunogen. It did not discriminate between free ABA or its ester derivatives. This antibody, which is the first monoclonal against Cl-conjugated ABA, shows interesting characteristics. It has high affinity (Ka=1.5 × 109 L/mol) and specificity. Compounds structurally similar to ABA, such as phaseic acid, dihydrophaseic acid, and both the 2,trans-isomer and the (R)-enantiomer of ABA, are not reactive. The narrow linear range of the standard curve (0.018–1.8 pmol) ensures great precision of the assay. This monoclonal antibody has been used for the quantification of ABA conjugates in crude aqueous extracts of bean leaves by radioimmuno-assay (RIA). The fractionation of the extracts by high-performance liquid chromatography (HPLC) confirmed the absence of cross-reacting compounds. Because of its affinity and specificity, in combination with antibodies against free ABA, this antibody should be a sound tool for studying the metabolism and immunolocalization of ABA in plant tissues.

Keywords

Abscisic Acid Keyhole Limpet Hemocyanine Crude Aqueous Extract Immunoreactive Fraction Dihydrophaseic Acid 

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Copyright information

© Springer-Verlag New York Inc. 1990

Authors and Affiliations

  • P. Perata
    • 1
  • P. Vernieri
    • 1
  • D. Armellini
    • 2
  • M. Bugnoli
    • 2
  • R. Presenting
    • 2
  • P. Picciarelli
    • 1
  • A. Alpi
    • 1
  • F. Tognoni
    • 1
  1. 1.Dipartimento di Biologia delle Piante AgrarieUniversità di PisaPisaItaly
  2. 2.Centro Ricerche SCLAVOSienaItaly

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