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Redroot Pigweed (Amaranthus retroflexus) Seed Germination Responses to Afterripening, Temperature, Ethylene, and Some Other Environmental Factors

Published online by Cambridge University Press:  12 June 2017

Mark W. Schonbeck  and
Grant H. Egley
Mark W. Schonbeck
Affiliation:
South. Weed Sci. Lab., Agric. Res., Sci. Ed. Admin., U.S. Dep. Agric., Stoneville, MS 38776
Grant H. Egley
Affiliation:
South. Weed Sci. Lab., Agric. Res., Sci. Ed. Admin., U.S. Dep. Agric., Stoneville, MS 38776
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Abstract

Germination responses of redroot pigweed (Amaranthus retroflexus L.) seeds to temperature, water potential, atmospheric ethylene and carbon dioxide concentrations, light, and nitrate ion were examined individually. Seeds kept in dry storage at −20 C and tested within 2 yr of harvest germinated at 35 C (12 to 25%) or 39.5 C (40 to 65%), but only 0 to 2% at 30 C and below. Germination at 35 C was prevented by water potentials below −4 bars. When seeds were kept in dry storage at 24 to 28 C, afterripening became evident within 2 months. After storage at this temperature for 4 yr, seeds showed 38% germination at 14 C, 40% at 35 C and −8 bars water potential, and over 90% under more favorable conditions. Ethylene (1 to 100 ppmv) or continuous light enhanced germination at 30 C regardless of degrees of afterripening, although the ethylene effect was most dramatic in nonafterripened seeds. Ethylene at 100 ppmv caused 40% germination in these seeds, compared to 1% for controls. Neither carbon dioxide (0.001 to 4.5% v/v) nor dissolved potassium nitrate (0.02 to 0.2% w/v) influenced germination. These results are discussed in relation to environmental factors influencing field emergence of redroot pigweed.

Keywords

Water potentialnitratecarbon dioxidelightdormancy
Type
Research Article
Information
Weed Science , Volume 28 , Issue 5 , September 1980 , pp. 543 - 548
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

1. Darlington, H. T. and Steinbauer, G. F. 1961. The 80 year period for Dr. Beal's seed viability experiment. Am. J. Bot. 48:321–325.Google Scholar
2. Duke, S. O. 1978. Significance of fluence-response data in phytochrome-induced seed germination. Photochem. Photobiol. 28: 383–388.CrossRefGoogle Scholar
3. Egley, G. H. 1979. Ethylene stimulation of cocklebur and redroot pigweed seed germination in soil. Abstr. Weed Sci. Soc. Am., pp. 83–84.Google Scholar
4. Eplee, R. E. 1975. Ethylene: A witchweed seed germination stimulant. Weed Sci. 23:433–436.CrossRefGoogle Scholar
5. Finney, D. J. 1971. Probit Analysis. Cambridge University Press, New York. 333 pp.Google Scholar
6. Heydecker, W., ed. 1973. Seed Ecology. Proc. 19th Easter School in Agric. Sci., University of Nottingham. Pennsylvania University Press, University Park. 578 pp.Google Scholar
7. Jann, R. C. and Amen, R. D. 1977. What is germination. Pages 7–28 in Khan, A. A., ed. The Physiology and Biochemistry of Seed Dormancy and Germination. North Holland Publishing Co., Amsterdam.Google Scholar
8. Kadman-Zahavi, A. 1959. Effects of short and continuous illuminations on the germination of Amaranthus retroflexus seeds. Bull. Res. Counc. Isr. D9:1–20.Google Scholar
9. Ketring, D. L. 1977. Ethylene and seed germination. Pages 156–178 in Khan, A. A., ed. Physiology and Biochemistry of Seed Dormancy and Germination. North Holland Publishing Co., Amsterdam.Google Scholar
10. Lewis, J. 1973. Longevity of crop and weed seeds: survival after 20 years in soil. Weed Res. 13:179–191.CrossRefGoogle Scholar
11. Michel, B. E. and Kaufmann, M. R. 1973. The osmotic potential of polyethylene glycol 6000. Plant Physiol. 51:914–916.CrossRefGoogle ScholarPubMed
12. Negm, F. B. and Smith, O. E. 1978. Effects of ethylene and carbon dioxide on the germination of osmotically inhibited lettuce seed. Plant Physiol. 62:473–476.Google Scholar
13. Roberts, E. H. 1960. Dormancy of rice seed. The distribution of dormancy periods. J. Exp. Bot. 12:319–329.Google Scholar
14. Roberts, E. H. 1965. Dormancy in rice seed. IV. Varietal responses to storage and germination temperatures. J. Exp. Bot. 16:341–349.Google Scholar
15. Roberts, H. A. 1962. Studies on the weeds of vegetable crops. II. Effect of six years of cropping on the weed seeds in the soil. J. Ecol. 50:803–813.Google Scholar
16. Smith, K. A. and Restall, S. W. F. 1971. The occurrence of ethylene in anaerobic soil. J. Soil Sci. 22:430–443.Google Scholar
17. Steinbauer, G. P. and Grigsby, B. 1957. Interaction of temperature, light and moistening agent in the germination of weed seeds. Weeds 5:175–182.Google Scholar
18. Stokes, P. 1965. Temperature and seed dormancy. Pages 746–804 in Ruhland, W., ed. Encyclopedia of Plant Physiology XV/2. Springer-Verlag, New York.Google Scholar
19. Taylorson, R. B. 1970. Changes in dormancy and viability of weed seeds in soils. Weed Sci. 18:265–269.Google Scholar
20. Taylorson, R. B. 1979. Responses of weed seeds to ethylene and related hydrocarbons. Weed Sci. 27:7–10.CrossRefGoogle Scholar
21. Taylorson, R. B. and Hendricks, S. B. 1971. Changes in phytochrome expressed by germination of Amaranthus retroflexus L. seeds. Plant Physiol. 47:619–622.Google Scholar
22. Wesson, G. and Wareing, P. F. 1969. The role of light in the germination of naturally occurring populations of buried weed seeds. J. Exp. Bot. 20:402–413.CrossRefGoogle Scholar