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Chemical Versus Microbial Decomposition of Amitrole in Soil

Published online by Cambridge University Press:  12 June 2017

D. D. Kaufman ,
J. R. Plimmer ,
P. C. Kearney ,
J. Blake  and
F. S. Guardia
P. C. Kearney
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Beltsville, Maryland
J. Blake
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Beltsville, Maryland
F. S. Guardia
Affiliation:
Crops Research Division, Agricultural Research Service, U. S. Department of Agriculture, Beltsville, Maryland
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Abstract

Degradation of 3-amino-l,2,4-triazole-5-C14 (amitrole-5-C14) in autoclaved, potassium azide, ethylene oxide, and dry-heat sterilized soil was compared with that observed in nonsterile soils by measuring evolved C14O2. Amitrole degradation occurred in azide and ethylene oxide-sterilized and nonsterile soils but not in autoclaved soils. Only slight degradation occurred in autoclaved soil re-inoculated with mixed cultures of soil microorganisms isolated from soil in which amitrole had been rapidly degraded. Addition of EDTA-Na to nonsterile and ethylene oxide sterilized soils reduced amitrole degradation. Addition of organic amendments to amitrole treated soil stimulated microbial activity but reduced amitrole degradation. Addition of specific metallic salts to certain soils increased the rate of amitrole degradation. Amitrole degradation occurred rapidly in several free radical generating chemical systems. These results and additional observations indicate that amitrole degradation, at least in three soils examined, was largely a chemical process, and that microbial involvement was only indirect.

Type
Research Article
Information
Weed Science , Volume 16 , Issue 2 , April 1968 , pp. 266 - 272
Copyright
Copyright © Weed Science Society of America 

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References

Literature Cited

1. Ashton, F. M. 1963. Fate of amitrole in soil. Weeds 11:167–170.CrossRefGoogle Scholar
2. Baker, K. F. 1957. The U. S. System for producing healthy container-grown plants. California Agr. Exp. Sta. Ext. Serv. Manual 63. 332 p.Google Scholar
3. Bondarenko, D. D. 1958. Decomposition of amitrole in soil. Proc. NCWCC 15:5 (Abstr.).Google Scholar
4. Brown, R. F., Jamison, S. E., Pandt, V. K., Penkus, J., White, G. R., and Braendlin, H. P. 1964. The reaction of Fenton's reagent with phenoxyacetic acid and some halogen-substituted phenoxyacetic acids. J. Org. Chem. 29:146–153.Google Scholar
5. Castelfranco, P. and Brown, M. S. 1963. A hypothesis of amitrole action based on its behavior toward free radical generating systems. Weeds 11:116–124.Google Scholar
6. Castelfranco, P., Oppenheim, A., and Yamaguchi, S. 1963. Riboflavin-mediated photodecomposition of amitrole in relation to chlorosis. Weeds 11:111–115.CrossRefGoogle Scholar
7. Day, B. E., Jordan, L. S., and Hendrixson, R. T. 1961. The decomposition of amitrole in California soils. Weeds 9:443–456.Google Scholar
8. Ercegovich, C. D. and Frear, D. E. H. 1964. The fate of 3-amino-l,2,4-triazole in soils. J. Agr. Food Chem. 12:26–29.Google Scholar
9. Fenton, H. J. H. 1894. Oxidation of tartaric acid in presence of iron. J. Chem. Soc. 65:899–910.Google Scholar
10. Friedlander, H. Z., Saldick, J., and Frank, C. R. 1963. Electron spin resonance spectra in various clay minerals. Nature 199:61–62.Google Scholar
11. Hilton, J. L. 1961. Evidence of photochemical and physiological mechanisms for riboflavin nullification of amitrole toxicity to plants. WSA Abstr. p. 44.Google Scholar
12. Hilton, J. L. 1962. Riboflavin nullification of inhibitory actions of 3-amino-l,2,4-triazole on seedling growth. Plant Physiol. 37:238–244.CrossRefGoogle Scholar
13. Kaufman, D. D. 1964. Microbial degradation of 2,2-dichloropropionic acid in five soils. Can. J. Microbiol. 10:843–852.CrossRefGoogle ScholarPubMed
14. Kaufman, D. D. 1966. An inexpensive, positive pressure, soil perfusion system. Weeds 14:90–91.CrossRefGoogle Scholar
15. Kaufman, D. D. 1967. Chemical vs. microbial degradation of amitrole in soil. WSA Abstr. p. 78.Google Scholar
16. Kaufman, D. D., Williams, L. E., and Sumner, C. B. 1963. Effect of plating medium and incubation temperature on growth of fungi in soil dilution plates. Can. J. Microbiol. 9:741–751.Google Scholar
17. Kearney, P. C. and Plimmer, J. R. 1967. Mechanisms of breakdown of amitrole in soils: photolytic and free radical reactions. WSA Abstr. p. 76.Google Scholar
18. MacKinnon, D. J. and Waters, W. A. 1953. The possible significance of Fenton's reaction in relation to oxidations effected by enzyme systems. J. of London Chem. Soc. 124:323–328.Google Scholar
19. MacRae, I. C. and Alexander, M. 1965. Microbial degradation of selected herbicides in soil. J. Agr. Food Chem. 13:72–76.Google Scholar
20. Plimmer, J. R., Kearney, P. C., Kaufman, D. D., and Guardia, F. S. 1967. Decomposition by free radical generating systems and by soils. J. Agr. Food Chem. 15: (In press).Google Scholar
21. Rex, R. W. 1960. Electron paramagnetic resonance studies of stable free radicles in lignius and hermic acid. Nature 188:1185–1186.CrossRefGoogle Scholar
22. Riepma, P. 1962. Preliminary observations on the breakdown of 3-amino-l,2,4-triazole in soil. Weed Res. 2:41–50.CrossRefGoogle Scholar
23. Steelink, C. and Tollin, G. 1967. Free radicals in soil, p. 147–169. In McLaren, A. D. and Peterson, G. H., Soil Biochemistry. Marcel Dekker, Inc., New York.Google Scholar
24. Sund, K. A. 1956. Residual activity of 3-amino-l,2,4-triazole in soils. J. Agr. Food Chem. 4:57–60.Google Scholar