A Membrane-located, Calcium-/Calmodulin-activated Phospholipase Stimulated by Auxin

  • D. James Morré
  • Barbara Drobes


Lipase-catalyzed hydrolyses of membrane phospholipids yield substances implicated as second messengers including calcium ions,1 diglycerides2 and inositol phosphates3. These substances are capable, under appropriate circumstances, of amplifying and translating received hormonal stimuli into a response cascade potentially important to growth control. Our work has focused on an examination, both in vivo and in vitro, of phospholipid breakdown1 and calcium release4 associated with the action of auxin in stimulation of elongation growth in plant stem segments.


Phosphatidic Acid Inositol Phosphates3 Elongation Growth Choline Phospholipid Response Cascade 
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  1. 1.
    D. J. Morré, B. Gripshover, A. Monroe, and J. T. Morré, Phosphatidylinositol turnover in isolated soybean membranes stimulated by the synthetic growth hormone 2, 4-dichlorophenoxyacetic acid, J. Biol. Chem., 259: 15364–15368 (1984).PubMedGoogle Scholar
  2. 2.
    D. J. Morré, J. T. Morré, and R. L. Varnold, Phosphorylation of membrane-located proteins of soybean in vitro and response to auxin, Plant Physiol., 75: 265–268 (1984).PubMedCrossRefGoogle Scholar
  3. 3.
    W. F. Boss, and M. O. Massel, Polyphosphoinosotides are present in plant tissue culture cells, Biochem. Biophys. Res. Commun. 132: 1018–1023 (1985).PubMedCrossRefGoogle Scholar
  4. 4.
    D. J. Morré, Calcium modulation of auxin-membrane interactions in plant cell elongation, in: “Molecular and Cellular Aspects of Calcium in Plant Development,” A. J. Trewavas, ed., Plenum, New York (1986).Google Scholar

Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • D. James Morré
    • 1
  • Barbara Drobes
    • 1
  1. 1.Department of Medicinal ChemistryPurdue UniversityWest LafayetteUSA

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