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Influence of Afterripening Temperature and Endogenous Rhythms on Downy Brome (Bromus tectorum) Germination

Published online by Cambridge University Press:  12 June 2017

D. C. Thill ,
R. D. Schirman  and
A. P. Appleby
D. C. Thill
Affiliation:
PPG Industries, Pullmam, WA (formerly Plant Physiol., Sci. Ed. Admin., Agric. Res., U.S. Dep. Agric., Dep. Agron. and Soils, Washington State Univ., Pullman)
R. D. Schirman
Affiliation:
Sci. Ed. Admin., Agric. Res., U.S. Dep. Agric., Dep. Agron and Soils, Washington State Univ., Pullman, WA 99164
A. P. Appleby
Affiliation:
Crop Sci. Dep., Oregon State Univ., Corvallis, OR 97331
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Abstract

Afterripening requirements and the possible occurrence of endogenously controlled germination rhythms in downy brome (Bromus tectorum L.) were investigated in the laboratory. Afterripening temperatures from 0 to 50 C, maintained for periods of 4 to 28 days, had little effect on the percentage and rate of downy brome germination when seeds were incubated at 15 and 20 C. However, at 30 C germination temperature, the percentage and rate of germination were significantly increased by short periods (4 to 7 days) of afterripening at 50 C. Similar results occurred at 20 to 40 C afterripening temperatures after 14 to 28 days exposure. In general, high temperature afterripening conditions (40 to 50 C) initially increased downy brome germination at 30 C incubation temperature, but prolonged exposure tended to decrease germination. No endogenously controlled germination rhythms were observed in downy brome caryopses.

Keywords

Accelerated afterripeningdormancy
Type
Research Article
Information
Weed Science , Volume 28 , Issue 3 , May 1980 , pp. 321 - 323
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

1. Evans, R. A. and Young, J. A. 1975. Enhancing germination of dormant seeds of downy brome. Weed Sci. 23:354–357.Google Scholar
2. Hulbert, L. C. 1955. Ecological studies of Bromus tectorum and other annual bromegrasses. Ecol. Monogr. 25:181–213.CrossRefGoogle Scholar
3. Klemmedson, J. O. and Smith, J. G. 1964. Cheatgrass (Bromus tectorus L.). Bot. Rev. 30:226–262.Google Scholar
4. Laude, H. M. 1956. Germination of freshly harvested seeds of some western range species. J. Range Manage. 9:126–129.CrossRefGoogle Scholar
5. Maguire, J. D. 1969. Endogenous germination rhythms in seeds. Proc. Assoc. Off. Seed Anal. 59:95–100.Google Scholar
6. Steinbauer, G. P. and Grigsby, B. H. 1957. Field and laboratory studies on the dormancy and germination of the seeds of chess (Bromus secalinus L.) and downy bromegrass (Bromus tectorus L.). Weeds 5:1–4.CrossRefGoogle Scholar
7. Sweeney, B. M. 1969. Rhythmic phenomena in plants. Pages 89–90 in Exp. Bot. Int. Ser. Monogr., Vol. 3. Academic Press, New York.Google Scholar
8. Taylorson, R. B. and Brown, M. M. 1977. Accelerated afterripening for overcoming seed dormancy in grass weeds. Weed Sci. 25:473–476.Google Scholar
9. Thill, D. C., Schirman, R. D., and Appleby, A. P. 1979. The osmotic stability of mannitol and polyethylene glycol 20,000 solutions used as seed germination media. Agron. J. 71:105–108.Google Scholar
10. Young, J. A. and Evans, R. A. 1975. Germinability of seed reserves in a big sagebrush community. Weeds Sci. 23:358–364.Google Scholar
11. Young, J. A., Evans, R. A., and Eckert, R. E. Jr. 1969. Population dynamics of downy brome. Weed Sci. 17:20–26.Google Scholar