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| Publication Type:
| Refereed |
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| Author(s): | Duke, Stephen O.;
Egley, Grant H.;
Reger, Bonnie J. |
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| Author Affiliation: | Southern Weed Science Laboratory, Agricultural Researcy Service, United States Department of Agriculture, Stonevill, Mississippi |
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| Title: | Model for variable light sensitivity in imbibed dark-dormant seeds |
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| Source: | Plant Physiology. Vol. 59, No. 2, February 1977, p. 244-249. |
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| Publishing Information: | Lancaster, PA: American Society of Plant Physiologists |
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| Keywords: | TIC Keywords: Light; Germination; Far red light
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| Abstract/Contents: | The level of light-induced germination of the seed of the common purlane (Portulaca olercea L.) and curly dock (Rumex crispus L.) changes with dark incubation time prior to brief, low energy, red light treatment. The rate at which phytochrome-far red-absorbing form (Pfr) acts in the light-induced population of seeds was measured by quantitating percent reversals of the red light effect with saturating far red light exposures at successive times after the red light exposure. A linear positive correlation was found betweeen this rate and the final germination level. These results are compatible with a model involving changing levels, during dark incubation, of a component with which Pfr interacts. In this model, germination is initiated after attainment of a certain level of interaction that the Pfr to Pr decay rate constant and total phytochrome level are stable during dark incubation. |
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| Language: | English |
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| Note: | Figures |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Duke, S. O., G. H. Egley, and B. J. Reger. 1977. Model for variable light sensitivity in imbibed dark-dormant seeds. Plant Physiol. 59(2):p. 244-249. |
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MSU catalog number: QK 1 .P68 |
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