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- W1557365784 abstract "We demonstrate that papillae in a resistant barley isoline, Riso 5678 (R), contain a light-absorbing component that is not characteristic of papillae in the corresponding susceptible isoline. In resistant coleoptiles incubated on a standard Ca(NO3)2 solution, penetration attempts by the powdery mildew fungus were typically unsuccessful and papillae contained the light-absorbing component, whereas in the susceptible coleoptiles the reverse occurred. Chlortetracycline strongly inhibited both the resistance to penetration and the incorporation of the light-absorbing component into papillae in the resistant isoline but had little or no effect in the susceptible isoline. When data from all treatments and genotypes were combined, the penetration efficiency was 5% where papillae contained the light-absorbing component, 99% where they did not, and 47% where the amount of light absorbance was intermediate. Autofluorescence, UV absorbance and lacmoid staining all suggested that the light-absorbing component is rich in phenylpropanoids. Acid fuchsin revealed a basic staining material in papillae in resistant but not in susceptible coleoptiles, and in resistant coleoptiles the basic staining material was specifically associated with penetration failures. Thus, the light-absorbing component and basic staining material in papillae may be molecular components of the ml-o resistance mechanism." @default.
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- W1557365784 date "1988-07-01" @default.
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- W1557365784 title "Evidence that molecular components of papillae may be involved in ml-o resistance to barley powdery mildew" @default.
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- W1557365784 doi "https://doi.org/10.1016/0885-5765(88)90040-9" @default.
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