Effect of divalent cations on malformin-induced efflux and biological activity |
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| Authors: | Curtis, Roy W. John, William W. |
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| Affiliation: | Botany and Plant Pathology, Purdue University W. Lafayette, Indiana 47907, U.S.A. |
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| Abstract: | The effect of malformin on permeability was determined by efflux.Malformin increased membrane permeability to various organicand inorganic compounds or ions and was inhibited by severaldivalent cations. From the time required to increase permeabilityand the amount of material effluxed malformin primarily increasedtonoplast permeability. Calcium inhibited malformin-inducedstem collapse, abscission, and to a slight extent, inhibitionof primary leaf expansion. Although calcium inhibited malformin-inducedroot curvatures, malformin did not enhance permeability of rootslices at concentrations optimal for the curvature response. (Received May 6, 1975; ) |
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