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Germination of Two Noxious Range Weeds Under Water and Salt Stresses with Variable Light Regimes

Published online by Cambridge University Press:  20 January 2017

Larry Larson  and
Gary Kiemnec
Larry Larson*
Affiliation:
Department of Rangeland Resources, Oregon State University, Corvallis, OR 97331
Gary Kiemnec
Affiliation:
Department of Crop and Soil science, Oregon State University, Corvallis, OR 97331
*
Corresponding author's E-mail: [email protected]
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Abstract

Russian knapweed and perennial pepperweed are invasive to meadow and riparian habitats in the semiarid intermountain west. Seed germination was tested to determine favored seedbed characteristics. Germination was inhibited in both species when water stress was imposed using polyethylene glycol. Knapweed achieved 60% germination after 40 d in dark and alternating light/dark environments. Pepperweed germination was greatest (30% after 14 d) in light and alternating light/ dark environments. Both species showed that germination declines when exposed to salt stress but continued to germinate under salt stress as high as 16 dSm−1.

Keywords

Perennial pepperweed, Lepidium latifolium L. # LEPLARussian knapweed, Centaurea repens L. # CENRERiparian habitatsseedbed ecology
Type
Research Article
Information
Weed Technology , Volume 19 , Issue 1 , March 2005 , pp. 197 - 200
Copyright
Copyright © Weed Science Society of America 

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References

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