Abscisic acid enhances aggregation and fusion of phospholipid vesicles

The plant hormone abscisic acid (ABA) is shown to enhance the aggregation and fusion of small unilamellar lipid vesicles composed of 80 mol% dimyristoylphosphatidylcholine (DMPC) and 20 mol% dimyristoylphosphatidylcholine (DMPE). Aggregation and fusion did not occur with single component (100 mol%)...

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Bibliographic Details
Published in:	Biochemical and biophysical research communications 1988-10, Vol.156 (1), p.511-516
Main Authors:	Stillwell, William, Brengle, Blair, Wassall, Stephen R.
Format:	Article
Language:	eng
Subjects:	Abscisic Acid Artificial membranes and reconstituted systems Biological and medical sciences Cyclohexanecarboxylic Acids Fundamental and applied biological sciences. Psychology Kinetics Liposomes Membrane physicochemistry Molecular biophysics Spectrometry, Fluorescence Structure-Activity Relationship vesicles
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Summary:	The plant hormone abscisic acid (ABA) is shown to enhance the aggregation and fusion of small unilamellar lipid vesicles composed of 80 mol% dimyristoylphosphatidylcholine (DMPC) and 20 mol% dimyristoylphosphatidylcholine (DMPE). Aggregation and fusion did not occur with single component (100 mol%) DMPC vesicles. Fusion was followed by two fundamentally different techniques, fluorescence resonance energy transfer which monitors intermixing of bilayers and ANTS-DPX which monitors intermixing of the sequestered aqueous interiors. It is suggested that a previously unreported role of ABA may be as a membrane fusagen.
ISSN:	0006-291X 1090-2104