Morphogenetic Effect of the Herbicide Cinch on Arabidopsis thaliana Root Development |
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Authors: | S F Baum L Karanastasis T L Rost |
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Institution: | (1) Section of Plant Biology, University of California, Davis, CA 95616, USA, US |
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Abstract: | Cinch is a morphogenetically active herbicide that inhibits primary root growth and induces abnormal ``nodule-like' lateral
roots on Arabidopsis thaliana seedlings. Using 200 nm Cinch, the early stages of lateral root formation occurred along the apical half of the root axis; but once emerged, they
were inhibited from further growth. Second-order lateral roots formed at the base of stunted first-order lateral roots after
5 days of Cinch treatment. Results from Cinch experiments suggested that pericycle cells are determined in the meristem to
be potential sites of lateral root formation, and the developmental transition point between emerged lateral roots and subsequent
growth is inhibited. Results using 2,4-dichlorophenoxyacetic acid and 2,3,5-triiodobenzoic acid suggest that Cinch is not
a chemical analog of auxin.
Received August 8, 1997; accepted February 23, 1998 |
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Keywords: | ,Arabidopsis thaliana—,Herbicide—,Cinch—,Root development—,Lateral roots |
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