Plant Physiol. Journal of Pharmacology and Experimental Therapeutics
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Plant Physiology 42:434-439 (1967)
© 1967 American Society of Plant Biologists

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Articles

Inhibition of RNA Synthesis and Auxin-Induced Cell Wall Extensibility and Growth by Actinomycin D 1,2

James S. Coartney, D. James Morre and Joe L. Key

Department of Botany and Plant Pathology, Purdue University, Lafayette, Indiana 47907

A linear stress strain analyzer was used to determine the effects of inhibitors of RNA and protein synthesis on auxin-induced increases in cell wall extensibility. With etiolated soybean hypocotyl, maize mesocotyl and Avena coleoptile sections and light-grown pea internode sections, inhibition of RNA synthesis resulted in inhibition of auxin-induced extensibility changes and cell expansion. The results with both actinomycin D and cycloheximide support an earlier conclusion that unstable cell constituents, presumably enzymes, are essential for cell wall loosening induced by auxin as well as for cell elongation.

1 This work supported in part by a contract with the United States Army Biological Center, Fort Detrick, Maryland and by NIH grant GM-10157 from the United States Public Health Service.

2 Purdue University AES Journal Paper No. 2830.




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ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 1967 by the American Society of Plant Biologists