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A radioimmunoassay for abscisic acid

Abstract

We have developed a radioimmunoassay (RIA) for abscisic acid (ABA) in the 0.1 ng to 2.5 ng range. Antibodies were obtained from rabbits immunized with ABA bound via its carboxyl group to bovine serum albumin. Cross-reactivity studies indicate that ABA esters are completely cross-reactive with ABA, while trans, trans abscisic acid (t-ABA) phaseic acid (PA) and dihydrophaseic acid (DPA) have much lower but significant cross-reactivities. Purification methods which reduce the levels of cross-reacting substances are described.

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Abbreviations

RIA:

radioimmunoassay

DPA:

4′-dihydrophaseic acid

PA:

phaseic acid

GC:

gas chromatography

HPLC:

high performance liquid chromatography

TLC:

thin-layer chromatography

BSA:

bovine serum albumin

ABA:

abscisic acid

t-ABA:

trans, trans abscisic acid

IAA:

indoleacetic acid

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Walton, D., Dashek, W. & Galson, E. A radioimmunoassay for abscisic acid. Planta 146, 139–145 (1979). https://doi.org/10.1007/BF00388224

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  • DOI: https://doi.org/10.1007/BF00388224

Key words

  • Abscisic acid
  • Radioimmunoassay (ABA)