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Germination and Root Growth of Two Noxious Weeds as Affected by Water and Salt Stresses

Published online by Cambridge University Press:  12 June 2017

Gary Kiemnec  and
Larry Larson
Gary Kiemnec
Affiliation:
Dep. Crop and Soil Science, Oregon State Univ., Corvallis, OR 97331
Larry Larson
Affiliation:
Dep. Range-land Res., Oregon State Univ., Corvallis, OR 97331
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Abstract

Hoary cress germination decreased with lower osmotic potential. Knapweed germination was greatest at 0.0 and −0.5 MPa of osmotic potential. Salinity increases up to an electrical conductivity (EC) of 12 dS m-1 had no effect on germination of either species. Hoary cress and knapweed root growth were reduced by decreases in osmotic potential. Hoary cress root growth was not affected by increasing salinity up to an EC of 12 dS m-1. Knapweed root growth was reduced by the initial increase in salinity (4 dS m-1), but not by higher salt concentrations.

Keywords

Diffuse knapweed, Centaurea diffusa Lam. ♯ CENDIhoary cress, Cardaria draba (L.) Desv. CADDROsmotic potential
Type
Research
Information
Weed Technology , Volume 5 , Issue 3 , September 1991 , pp. 612 - 615
Copyright
Copyright © 1991 Weed Science Society of America 

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