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Plant Physiology 57:493-496 (1976)
© 1976 American Society of Plant Biologists

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Articles

Additive and Synergistic Growth-inhibiting Properties of the Canaline-Urea Cycle Amino Acids 1,2

Gerald A. Rosenthal, Dushyant K. Gulati and P. S. Sabharwal

a T. H. Morgan School of Biological Sciences, University of Kentucky, Lexington, Kentucky 40506

Growth studies with Lemna minor revealed the additive and synergistic growth-inhibiting properties of the canaline-urea cycle amino acids. Simultaneous canavanine and canaline treatment caused an additive reduction in frond production. Ureidohomoserine interacted with canaline or canavanine to affect synergistically L. minor growth by enhancing individual canavanine or canaline toxicity and increasing the additive growth reduction caused by canavanine plus canaline. The ornithineurea cycle amino acids effectively counteracted both the additive and synergistic growth-inhibiting properties of the canaline-urea cycle compounds.

1 This investigation was supported by grants to G.A.R. from the National Science Foundation (GB-40198), the National Institutes of Health (AM-17322), and the Research Committee of the University of Kentucky.

2 This paper is the second in a series on the biological effects of the canaline-urea cycle amino acids on higher plants. The first paper appeared in Plant Physiology 56: 420-424.






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Copyright © 1976 by the American Society of Plant Biologists