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Hormonal Control of Weed Seed Germination

Published online by Cambridge University Press:  12 June 2017

R. E. Holm  and
M. R. Miller
R. E. Holm
Affiliation:
Diamond Shamrock Corp., T. R. Evans Res. Center, P. O. Box 348, Painesville, Ohio 44077
M. R. Miller
Affiliation:
Diamond Shamrock Corp., T. R. Evans Res. Center, P. O. Box 348, Painesville, Ohio 44077
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Abstract

Freshly-harvested seeds of several common weeds showed little or no promotion of germination by light. However, after burial for 6 months, germination becomes entirely dependent on exposure to light. Red light promoted the germination of the buried seeds, and this promotion was reversed by far-red light, indicating phytochrome involvement. Freshly-harvested seeds were made light-requiring by treatment with mannitol. The germination of these light-requiring seeds was promoted by red light, gibberellic acid (GA), acetylcholine (ACh), and adenosine 3′,5′-monophosphate (cyclic AMP). The phytochrome response may trigger ACh synthesis which causes the release of GA from a bound form and/or GA synthesis which enhances the production of cyclic AMP which initiates the germination response.

Type
Research Article
Information
Weed Science , Volume 20 , Issue 3 , May 1972 , pp. 209 - 212
Copyright
Copyright © Weed Science Society of America 

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References

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