Abstract
The effects of three isopropyl carbanilate derivatives (propham, chlorpropham, 3,4‐diCl isopropyl carbanilate) were studied on Acer pseudoplatanus L. cell suspension cultures (Lamport's strain). At 0.1 mM, three types of effects were observed: the 3,4‐diCl derivative rapidly killed the cells; chlorpropham inhibited mitosis, but the cells remained alive without any significant increase in fresh or dry matter; and propham strongly inhibited mitosis, but not cell growth.Ultrastructural analysis indicated that no observable changes in mitochondrial or plastid density occurred during the cytoplasmic expansion in the presence of propham. Size increase was also accompanied by vacuolar expansion and morphological changes of the nuclei. In Acer cell cultures, isopropyl carbanilates clearly show selective inhibition of mitosis only when the phenyl ring is not substituted by chlorine.
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