Abstract

Chlorophyll breakdown in excised oat leaves is retarded by methyl-2-benzimidazolecarbamate, benzimidazole, and kinetin. Protoplasts derived from treated leaves showed lower nuclease activity, increased leucine incorporation, and decreased uridine and thymidine incorporation into trichloroacetic acid-insoluble materials relative to water-treated controls. Methyl-2-benzimidazolecarbamate is more active than benzimidazole in affecting macromolecular synthesis, and both compounds resemble kinetin in their effects on host-plant physiology. Protoplasts can be useful tools in the analysis of the action of pesticides.

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