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The Role of Phenolics and Abscisic Acid in Nutsedge Tuber Dormancy

Published online by Cambridge University Press:  12 June 2017

N. O. Jangaard
Affiliation:
Plant Physiology, Biological Sciences Research Center, Shell Development Company, P. O. Box 4248, Modesto, California
M. M. Sckerl
Affiliation:
Plant Physiology, Biological Sciences Research Center, Shell Development Company, P. O. Box 4248, Modesto, California
R. H. Schieferstein
Affiliation:
Plant Physiology, Biological Sciences Research Center, Shell Development Company, P. O. Box 4248, Modesto, California

Abstract

The phenolic content of purple nutsedge (Cyperus rotundus L.) and yellow nutsedge (Cyperus esculentus L.) was determined. The major phenolic components were p-coumaric, ferulic, p-hydroxybenzoic, syringic, vanillic, salicylic, proto-catechuic, and caffeic acids, and eugenol. High concentrations of eugenol and salicylic acid inhibited the sprouting of nutsedge tubers. The lack of activity at lower concentrations argues against a major role for these compounds in maintaining nutsedge tuber dormancy. Exogenous abscisic acid inhibited nutsedge tuber sprouting and may be a natural dormancy factor in nutsedge.

Type
Research Article
Copyright
Copyright © Weed Science Society of America 

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