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Survival of Seed and Tubers of Dwarf Spikerush (Eleocharis coloradoensis) After Exposure to Extreme Temperatures

Published online by Cambridge University Press:  12 June 2017

Richard R. Yeo  and
Jon R. Thurston
Richard R. Yeo
Affiliation:
Agric. Res., Sci. Ed. Admin., U.S. Dep. Agric., Davis, CA 95616
Jon R. Thurston
Affiliation:
Agric. Res., Sci. Ed. Admin., U.S. Dep. Agric., Davis, CA 95616
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Abstract

Seed and tubers and dwarf spikerush [Eleocharis coloradoensis (Britt.) Gilly] survived extremely cold and hot temperatures if damp-dried before exposure. Damp-dried seed survived 14 days exposure to −196 C and 21 days exposure to 72 C, and then germinated 59 and 24%, respectively. Seed submersed in water germinated 20% when exposed to −15 C for 30 days and 4% when exposed to 60 C for 3 days. When damp-dried seed were warmed at 37 C for 21 days the germination was nearly twice that for wet seed treated similarly. Tubers that were damp-dried before exposure survived −196 C for 14 days and 49 C for 21 days and then germinated 20 and 49%, respectively. Tubers that were exposed wet to hot or cold temperatures were killed at less extreme temperatures than seed. None of the tubers exposed wet survivied −15 C for 30 days or 49 C for 3 days.

Keywords

Wetdamp-driedexposuregermination
Type
Research Article
Information
Weed Science , Volume 27 , Issue 4 , July 1979 , pp. 434 - 436
Copyright
Copyright © 1979 by the Weed Science Society of America 

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References

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