Effect of water stress on abscisic acid levels in white lupin (Lupinus albus L.) fruit, leaves and phloem exudate

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 extra...

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Bibliographic Details
Published in:Planta 1978, Vol.142 (3), p.287-290
Main Author: Hoad, G.V
Format: Article
Language:English
Subjects:
Dehydration
Ethers
field crops
Fruits
Leaves
Phloem
plant biochemistry
plant physiology
Plant roots
Plant tissues
Plants
Sap
Seeds
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Summary: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.
ISSN:0032-0935
1432-2048
DOI:10.1007/BF00385079