Metabolism of Eicosapolyenoic Acid Lipids in Race Specific Interactions Between Phytophthora infestans and Potato

  • R. M. Bostock


Arachidonic (AA) and eicosapentaenoic (EPA) acids are efficient elicitors of the metabolic cascade occurring in potato tuber during hypersensitivity expression,1, 2, 3 Important components of this cascade include the accumulation of sesquiterpene phytoalexins, deposition of lignin and hydroxyproline in tuber cell walls, evolution of ethylene and ethane, and stimulation of oxidative enzymes. Induction of this response following inoculation with incompatible races of the fungal pathogen, Phytophthora infestans, in which EPA and AA occur primarily as esters in membrane and storage lipids, restricts fungal ingress and prevents colonization of host tissue.4,5 Compatible isolates of the pathogen colonize potato tissue and defense reactions are not induced. The interaction between P. infestans and potato provides a unique opportunity for the study of bioTogically active lipids in recognition phenomena in plant-pathogen interaction.


Potato Tuber Hypersensitive Response Phytophthora Infestans Polar Lipid Fraction Elicitor Activity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    R. M. Bostock, J. A. Kuc’ and R. A. Laine. Eicosapentaenoic and arachidonic acids from Phytophthora infestans elicit fungitoxic sesquiterpenes in the potato. Science 212: 67 (1981).PubMedCrossRefGoogle Scholar
  2. 2.
    R. M. Bostock, R. A. Laine and J. A. Kuc’. Factors affecting the elicitation of sesquiterpenoid phytoalexin accumulation by eicosapentaenoic and arachidonic acids in potato. Plant Physiol. 70: 1417 (1982).PubMedCrossRefGoogle Scholar
  3. 3.
    R. M. Bostock, D. A. Schaeffer and R. Hammerschmidt. Comparison of elicitor activities of arachidonic acid, fatty acids and glucans from Phytophthora infestans in hypersensitivity expression in potato tuber. Physiol. Molecular Plant Pathol. 28: (in press) (1986).Google Scholar
  4. 4.
    J. R. Creamer and R. M. Bostock. Characterization and biological activity of Phytophthora infestans phospholipids in the hypersensitive response of potato tuber. Physiol. Molecular Plant Pathol. 28: 215 (1986).CrossRefGoogle Scholar
  5. 5.
    M. J. Kurantz and S. F. Osman. Class distribution, fatty acid composition and elicitor activity of Phytophthora infestans mycelial lipids. Physiol. Plant Pathol. 22: 363 (1983).Google Scholar
  6. 6.
    C. L. Preisig and J. A. Kuc’. Arachidonic acid-related elicitors of the hypersensitive response in potato and enhancement of their activities by glucans from Phytophthora infestans (Mont.) de Bary. Arch. Biochem. Biophys. 236: 379 (1985).PubMedCrossRefGoogle Scholar
  7. 7.
    D. A. Stelzig, R. D. Allen, and S. K. Bhatia. Inhibition of phytoalexin synthesis in arachidonic acid-stressed potato tissue by inhibitors of lipoxygenase and cyanide-resistant respiration. Plant Physiol. 72: 746 (1983).PubMedCrossRefGoogle Scholar
  8. 8.
    T. Galliard. The enzymic deacylation of phospholipids and galactolipids in plants. Purification and properties of a lipolytic acyl-hydrolase from potato tubers. Biochem. J. 121: 379 (1971).PubMedGoogle Scholar

Copyright information

© Plenum Press, New York 1987

Authors and Affiliations

  • R. M. Bostock
    • 1
  1. 1.Department of Plant PathologyUniversity of CaliforniaDavisUSA

Personalised recommendations