Abstract
Abscisic acid (ABA) was identified by combined gas liquid chromatography-mass spectrometry in sieve-tube exudate collected from the cut stylar ends of white lupin fruit. Water stress caused an increase in ABA levels in leaf, seed and pod tissues and phloem exudate. When compared with levels in extracts of these tissues, the concentration of ABA in sieve-tube sap was very high. It is suggested that ABA is actively transported out of mature leaves in the phloem and this finding is discussed in terms of the ABA balance of the plant.
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Abbreviations
- ABA:
-
abscisic acid
- GLC:
-
gas liquid chromatography
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Hoad, G.V. Effect of water stress on abscisic acid levels in white lupin (Lupinus albus L.) fruit, leaves and phloem exudate. Planta 142, 287–290 (1978). https://doi.org/10.1007/BF00385079
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DOI: https://doi.org/10.1007/BF00385079