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Seasonal Patterns of Growth Regulators in Tubers of Yellow Nutsedge (Cyperus esculentus)

Published online by Cambridge University Press:  12 June 2017

B. Fernandez Muñiz  and
R. Sanchez Tames
B. Fernandez Muñiz
Affiliation:
Dep. Fisiol. Vegetal, Univ. de Oviedo, Oviedo, Spain
R. Sanchez Tames
Affiliation:
Dep. Fisiol. Vegetal, Univ. de Oviedo, Oviedo, Spain
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Abstract

Tubers of yellow nutsedge (Cyperus esculentus L.) were collected over a 2-yr period to investigate the variation in abscisic acid (ABA) and total phenols throughout the year. The amount of ABA increased gradually from the end of the summer to November when it reached the highest level (6.81 μg/g fresh wt of tubers). This coincided with the onset of dormancy of the tubers in the field. In April, when a maximum of tubers showed sprouting, no free ABA was detected in tuber extracts. These data seem to indicate that free ABA is, in part at least, responsible for the dormant state of tubers. No obvious relation was seen between the state of dormancy of the tubers and their total phenolic content. It is unlikely that the phenolics as a group have one specific role in regulating dormancy of the tubers, but is possible that individual classes, or individual phenols, may possess significant activity.

Keywords

Abscisic acidphenols, dormancy
Type
Research Article
Information
Weed Science , Volume 30 , Issue 1 , January 1982 , pp. 83 - 86
Copyright
Copyright © 1982 by the Weed Science Society of America 

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