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| Publication Type:
| Report |
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| Author(s): | Price, L. J.;
Harwood, J. L.;
Cole, D. J.;
Moss, S. R. |
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| Author Affiliation: | Price and Harwood: School of Molecular and Medical Biosciences, University of Wales Cardiff, Cardiff, United Kingdom; Cole: Rhône-Poulenc Agriculture Limited, Ongar, Essex, United Kingdom; Moss: IACR-Rothamsted, Harpenden, Herts, United Kingdom |
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| Title: | Characteristics of acetyl-CoA carboxylases from graminicide-tolerant grasses |
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| Section: | Session 8C: Mode of action and metabolism of herbicides
Other records with the "Session 8C: Mode of action and metabolism of herbicides" Section
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| Meeting Info.: | Brighton, UK: November 17-20, 1997 |
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| Source: | British Crop Protection Council Conference Proceedings- Weeds 1997. Vol. 2, 1997, p. 783-788. |
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| Publishing Information: | Farnham, Surrey, England: British Crop Protection Council |
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| # of Pages: | 6 |
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| Keywords: | TIC Keywords: Festuca rubra; Zea mays; Herbicide resistance; Comparisons; Acetyl-coenzyme A; Carboxylase; Isoenzymes; Alopecurus myosuroides
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| Abstract/Contents: | Graminicides of the aryloxyphenoxypropionate or cyclohexanedione classes act on acetyl-CoA carboxylase (ACCase). Resistance is a problem either in inherently insensitive weed species or when acquired following herbicide use in the field. In an effort to understand the molecular mechanisms responsible for herbicide-insensitivity, we have studied acetyl-CoA carboxylases from maize (sensitive), Festuca rubra (inherently-insensitive) and resistant or sensitive populations of Alopecurus myosuriodes. These studies have included acetyl-CoA carboxylases isolated from both leaves and cell cultures. Isozymes have been separated from a tolerant cell culture of A. myosuriodes, which differ in their pH optima, and sensitivity to quizalofop. The major and minor isozymes are 1,300-fold and 300-fold less sensitive to quizalofop, respectively, than the major ACCase isozyme isolated from maize leaves. Kinetic characteristics of the various purified ACCase isozymes have been evaluated and are reported here. Our results show clearly that resistance in the Notts A1 population of A. myosuriodes to quizalofop and sethoxydim is due to an altered form of ACCase which is much less sensitive to inhibition. The data also show the utility of using tissue cultures where leaf material is limited. |
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| Language: | English |
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| References: | 12 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Price, L. J., J. L. Harwood, D. J. Cole, and S. R. Moss. 1997. Characteristics of acetyl-CoA carboxylases from graminicide-tolerant grasses. Br. Crop Prot. Coun. Conf. Proc. Weeds. 2:p. 783-788. |
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