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Influence of Light and Temperature on the Germination and Seedbed Ecology of Common Mullein (Verbascum thapsus)

Published online by Cambridge University Press:  12 June 2017

R. J. Semenza ,
J. A. Young  and
R. A. Evans
R. J. Semenza
Affiliation:
Sci. Ed. Admin., U.S. Dep. Agric., Renewable Res. Center, Univ. of Nevada, 920 Valley Road, NV 89512
J. A. Young
Affiliation:
Sci. Ed. Admin., U.S. Dep. Agric., Renewable Res. Center, Univ. of Nevada, 920 Valley Road, NV 89512
R. A. Evans
Affiliation:
Sci. Ed. Admin., U.S. Dep. Agric., Renewable Res. Center, Univ. of Nevada, 920 Valley Road, NV 89512
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Abstract

Germination of common mullein (Verbascum thapsus L.) in relation to constant and alternating temperatures, and light quality and duration was studied. In the dark, optimum germination occurred with 8-h warm periods of 30 to 40 C alternating with 16-h cold periods of 15 to 35 C. In the dark, no germination occurred below 10 C. With light during the 8-h warm periods, germination occurred at temperatures from 2 to 40 C, alternating with 0 C cold periods. The range of optimum temperatures for germination was also greatly expanded with light. Exposures to 24-h periods of red light, followed by incubation in the dark, produced the same germination response as 8 h of white light daily. Common mullein seeds germinated on the surface of the soil even though the seeds did not have mucilage.

Keywords

Germinationtemperaturelight qualityroadside weed control
Type
Research Article
Information
Weed Science , Volume 26 , Issue 6 , November 1978 , pp. 577 - 581
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

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