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Differential Cold Tolerance of Quackgrass and Johnsongrass Rhizomes

Published online by Cambridge University Press:  12 June 2017

E.W. Stoller*
Affiliation:
N. Central Region, Agric. Res. Serv., U.S. Dep. Agric., Agron. Dep., Univ. of Illinois, Urbana, IL 61801

Abstract

Rhizomes of quackgrass [Agropyron repens (L.) Beauv.] and johnsongrass [Sorghum halepense (L.) Pers.] were buried at various depths in the soil in the fall of 1972 and 1973, then removed at different times for viability tests. Quackgrass rhizomes retained viability at 2 cm where the coldest temperatures were −17 C. Johnsongrass rhizomes survived the winter at depths of 20 cm or more, and were killed at temperatures below about −9 C. Quackgrass rhizomes had a higher concentration of lipids and higher proportions of unsaturated fatty acids than did johnsongrass rhizomes. This difference may contribute to the superior cold tolerance of the quackgrass rhizomes.

Type
Research Article
Copyright
Copyright © 1977 by the Weed Science Society of America 

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References

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