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  • 1
    Electronic Resource
    Electronic Resource
    Effect of diacetyl piquerol on H+-ATPase activity of microsomes fromIpomoea purpurea (1990)
    Springer
    Journal of chemical ecology 16 (1990), S. 2253-2261 
    Details
    ISSN: 1573-1561
    Keywords: Piquerol ; Piqueria trinervia ; modes of action ; allelopathy ; allelochemicals ; microsomes ; Ipomoea purpurea ; plasmalemma ; tonoplast ; germination ; H+-ATPase ; proton pumps
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The effect of an allelopathic compound, diacetyl-piquerol on the H+ -ATPase activity of the microsomal fraction from the radicles of a common weedIpomoea purpurea was studied. The diacetyl-piquerol inhibited the germination and radicle growth fromI. purpurea; the radicle growth was increasingly inhibited (10% to 100%) as piquerol concentrations were raised (10 μM to 1000 μM). The H+-ATPase activity was inhibited (48%) by 500 μM diacetyl-piquerol, and this inhibition was higher in plasma membrane ATPase (67.2%) than in tonoplast membrane ATPase (31.4%). Additional studies of the precise physiological mechanisms of interference caused by allelopathic compounds are needed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01026935
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of phytotoxic resin glycoside on activity of H+-ATPase from plasma membrane (1995)
    Springer
    Journal of chemical ecology 21 (1995), S. 289-297 
    Details
    ISSN: 1573-1561
    Keywords: Ipomoea tricolor ; Echinochloa crusgalli ; allelopathy ; allelochemicals ; resin glycoside ; plasma membrane ; plasma membrane H+-ATPase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract A resin glycoside mixture isolated fromIpomoea tricolor inhibited radicle growth ofEchinochloa crusgalli. The effect of the resin was tested on the activity of the plasma membrane H+-ATPase fromE. crusgalli. For this purpose, plasma membrane vesicles were purified by the method of aqueous two-phase partitioning. The resin glycoside inhibited by 30% the activity of the plasma membrane ATPase. The same result was obtained with the purified main component of the resin. This indicates that the plasma membrane ATPase can be one of the cellular targets of the resin. Hence it is possible that the mechanism of action of the resin involves an inhibition of the plasma membrane ATPase.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02036718
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