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Phytochrome Action in Seed Germination of Fringed Sage (Artemisia frigida)

Published online by Cambridge University Press:  12 June 2017

Yuguang Bai ,
James T. Romo  and
Junqiang Hou
Yuguang Bai
Affiliation:
Dep. Plant. Soil and Insect Sci., Univ. Wyoming, Laramie, WY 82071
James T. Romo
Affiliation:
Dep. Crop Sci. and Plant Ecol., Univ. Saskatchewan, Saskatoon, Canada S7N 5A8
Junqiang Hou
Affiliation:
Dep. Crop Sci. and Plant Ecol., Univ. Saskatchewan, Saskatoon, Canada S7N 5A8
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Abstract

Seeds (achenes) of fringed sage were collected in central Saskatchewan in 1987, 1990, and 1991, and studies were conducted to determine the effects of imbibition time before brief or prolonged exposure to red (R) and far-red (FR) light on germination. A majority of the seeds required light for germination, but a substantial proportion germinated in darkness. Phytochrome controlled germination, and its activity was influenced by the duration of imbibition and by seed collections. At least 8 h of imbibition were required before phytochrome was activated by R light. The stimulation of germination could be reversed by FR light, and this suppression subsequently could be reversed by exposure to R light. Variable light requirements for germination of fringed sage can be met following large- or small-scale disturbances or in relatively undisturbed conditions.

Keywords

Fringed sage, Artemisia frigida Willd. ♯ ARTFRGermination ecologylightimbibitionwater uptakeARTFR
Type
Weed Biology and Ecology
Information
Weed Science , Volume 44 , Issue 1 , March 1996 , pp. 109 - 113
Copyright
Copyright © 1996 by the Weed Science Society of America 

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