Plant Physiol. Illumina
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Plant Physiology 60:95-97 (1977)
© 1977 American Society of Plant Biologists

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Polarity of Indoleacetic Acid in young Coleus Stems 1

William P. Jacobs

a Department of Biology, Princeton University, Princeton, New Jersey 08540

Young internodes of Coleus blumei Benth. have long been known for their sizable amount of acropetal indoleacetic acid movement. However, plants of the same clone, under improved growing conditions, now show almost absolute basipetal polarity of 14C-indoleacetic acid, as measured by liquid scintillation counting of 14C in the receiver cylinders of agar. The ratio of basipetal to acropetal movement is now as much as 85:1, instead of the 3:1 ratio found years ago under conditions providing slower growth.

1 Research supported by funds provided to Princeton's Biology Department by the Eugene Higgins Trust Fund and the Whitehall Foundation.






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Copyright © 1977 by the American Society of Plant Biologists