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Germination Responses to Temperature of Atrazine-Resistant and -Susceptible Biotypes of Two Pigweed (Amaranthus) Species

Published online by Cambridge University Press:  12 June 2017

Susan E. Weaver  and
A. Gordon Thomas
Susan E. Weaver
Affiliation:
Agric. Canada, Res. Stn., Harrow, Ontario, Canada NOR 1G0
A. Gordon Thomas
Affiliation:
Agric. Canada, Res. Stn., P.O. Box 440, Regina, Saskatchewan, Canada S4P 3A2
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Abstract

Percent germination and germination rates of seeds of atrazine (6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diamine)-resistant and -susceptible biotypes of redroot pigweed (Amaranthus retroflexus L. # AMARE) and Powell amaranth (A. powellii S. Wats. # AMAPO) from southern Ontario were compared in petri dishes using a 100-cell germination plate. The plate provided 100 separately controlled, alternating temperature combinations ranging from 0 to 45 C in increments of 5 C. The experiment was conducted under alternating light and dark conditions for 21 days and under constant dark conditions for 7 days. Initial seed viabilities exceeded 90% for all four biotypes. Under alternating light and darkness, the resistant biotype of Powell amaranth had significantly lower total germination and a slower rate of germination than the susceptible biotype, whereas the biotypes of redroot pigweed did not differ in germination response. Germination rate and total germination were positively correlated for all four biotypes. In constant darkness, the atrazineresistant biotypes of both species had significantly lower germination percentages compared to the susceptible biotypes. In general, percent germination of Powell amaranth was greater than that of redroot pigweed for day and night temperatures <25 C, whereas redroot pigweed had greater germination at higher temperatures. Greater seed dormancy of the resistant biotypes under some light and temperature combinations may have implications for the persistence of resistant populations in the field.

Keywords

Powell amaranthredroot pigweedAmaranthus powelliiAmaranthus retroflexusAMAREAMAPO
Type
Weed Biology and Ecology
Information
Weed Science , Volume 34 , Issue 6 , November 1986 , pp. 865 - 870
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

Literature Cited

1. Ahrens, W. H. and Stoller, E. W. 1983. Competition, growth rate, and CO2 fixation in triazine-susceptible and -resistant smooth pigweed (Amaranthus hybridus). Weed Sci. 31:438–444.Google Scholar
2. Conard, S. G. and Radosevich, S. R. 1979. Ecological fitness of Senecio vulgaris and Amaranthus retroflexus biotypes susceptible or resistant to atrazine. J. Appl. Ecol. 16:171–177.CrossRefGoogle Scholar
3. Evans, R. A., Esai, D. A., Book, D. N., and Young, J. A. 1982. Quadratic response surface analysis of seed-germination trials. Weed Sci. 30:411–416.Google Scholar
4. Frost, R. A. and Cavers, P. B. 1975. The ecology of pigweeds (Amaranthus) in Ontario. I. Interspecific and intraspecific variation in seed germination among local collections of A. powellii and A. retroflexus . Can. J. Bot. 53:1276–1284.CrossRefGoogle Scholar
5. Garcia-Baudin, J. M. and Aquirre, R. 1983. Comparacion de la germinacion de un biotipo sensible y otro resistente, a la atrazina, de Solanum nigrum spp. nigrum . An. INIA/Ser. Agric. 23:71–78.Google Scholar
6. Gasquez, J., Darmency, H., and Compoint, J. P. 1981. Comparaison de la germination et de la croissance de biotypes sensibles et résistants aux triazines chez quatre espèces de mauvaises herbes. Weed Res. 21:219–225.CrossRefGoogle Scholar
7. Gressel, J. and Segel, L. A. 1982. Interrelating factors controlling the rate of appearance of resistance: The outlook for the future. Pages 325–347 in LeBaron, H. and Gressel, J., eds. Herbicide Resistance in Plants. John Wiley and Sons, New York.Google Scholar
8. Mapplebeck, L. R., Souza Machado, V., and Grodzinski, B. 1982. Seed germination and seedling growth characteristics of atrazine susceptible and resistant biotypes of Brassica campestris . Can. J. Plant Sci. 62:733–739.Google Scholar
9. Marriage, P. B. and Warwick, S. I. 1980. Differential growth and response to atrazine between and within susceptible and resistant biotypes of Chenopodium album L. Weed Res. 20: 9–15.Google Scholar
10. McLaughlin, N. B., Bowes, G. R., Thomas, A. G., Dyck, F. B., Lindsay, T. M., and Wise, R. F. 1985. A new design for a seed germinator with 100 independently temperature controlled cells. Weed Res. 25:161–173.CrossRefGoogle Scholar
11. Pfister, K., Steinback, K. E., Gardner, G., and Arntzen, C. J. 1981. Photoaffinity labeling of an herbicide receptor protein in chloroplast membranes. Proc. Natl. Acad. Sci. 78:981–985.Google Scholar
12. Radosevich, S. R. and Holt, J. S. 1982. Physiological responses and fitness of susceptible and resistant weed biotypes to triazine herbicides. Pages 163–183 in LeBaron, H. and Gressel, J., eds. Herbicide Resistance in Plants. John Wiley and Sons, New York.Google Scholar
13. Taylorson, R. B. and Hendricks, S. B. 1972. Rehydration of phytochrome in imbibing seeds of Amaranthus retroflexus L. Plant Physiol. 49:663–665.CrossRefGoogle ScholarPubMed
14. Toole, E. H. and Brown, E. 1946. Final results of the Duvel buried seed experiment. J. Agric. Res. 72:201–210.Google Scholar
15. Warwick, S. I. and Black, L. 1981. The relative competitiveness of atrazine susceptible and resistant populations of Chenopodium album and C. strictum . Can. J. Bot. 59:689–693.Google Scholar
16. Weaver, S. E. 1984. Differential growth and competitive ability of Amaranthus retroflexus, A. powellii, and A, hybridus . Can. J. Plant Sci. 64:715–724.Google Scholar
17. Weaver, S. E. and McWilliams, E. L. 1980. The biology of Canadian weeds. 44. Amaranthus retroflexus L., A. powellii S. Wats, and A. hybridus L. Can. J. Plant Sci. 60:1215–1234.Google Scholar
18. Weaver, S. E. and Warwick, S. I. 1982. Competitive relationships between atrazine resistant and susceptible populations of Amaranthus retroflexus and A. powellii from southern Ontario. New Phytol. 92:131–139.CrossRefGoogle Scholar
19. Weaver, S. E., Warwick, S. I., and Thomson, B. K. 1982. Comparative growth and atrazine response of resistant and susceptible populations of Amaranthus from southern Ontario. J. Appl. Ecol. 19:611–620.Google Scholar