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Allelopathy of Small Everlasting (Antennaria microphylla): Identification of Constituents Phytotoxic to Leafy Spurge (Euphorbia esula)

Published online by Cambridge University Press:  12 June 2017

Gary D. Manners  and
Donald S. Galitz
Gary D. Manners
Affiliation:
U.S. Dep. Agric., Agric. Res. Serv., Western Regional Res. Ctr., Albany, CA 94710
Donald S. Galitz
Affiliation:
Dep. Bot., North Dakota State Univ., Fargo, ND
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Abstract

The ether extract of small everlasting (Antennaria microphylla Rydb.) was phytotoxic to lettuce seed root growth and leafy spurge (Euphorbia esula L. # EPHES) root elongation and cell culture growth. Three phenolic compounds (hydroquinone, arbutin, and caffeic acid) were chromatographically isolated and characterized from the ether extract. Arbutin and caffeic acid were moderately phytotoxic to leafy spurge root growth at 300 ppm (w/v), and hydroquinone was strongly phytotoxic to leafy spurge root growth at 50 ppm (w/v). The observed phytotoxicity of hydroquinone and the high-yield natural occurrence of arbutin, a water soluble, easily hydrolyzed monoglucoside of hydroquinone, in small everlasting is consistent with the participation of these two compounds in the observed allelopathy of small everlasting against leafy spurge.

Keywords

Hydroquinonearbutincaffeic acidbenzoquinonephenolicsEPHES
Type
Physiology, Chemistry, and Biochemistry
Information
Weed Science , Volume 34 , Issue 1 , January 1986 , pp. 8 - 12
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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