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| Publication Type:
| Refereed |
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| Author(s): | Stoltenberg, David E.;
Gronwald, John W.;
Wyse, Donald L.;
Burton, James D.;
Somers, David A.;
Gengenbach, Burle G. |
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| Author Affiliation: | Grad. Res. Asst.; Plant Physiol., U.S.D.A., A.R.S.; Prof.;Postdoctoral Res. Assoc.; Assoc. Prof.; and Prof., respectively, Dep. Agron. and Plant Genetics, Univ. MN, St. Paul, MN. |
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| Title: | Effect of Sethoxydim and Haloxyfop on Acetyl-Coenzyme A Carboxylase Activity in Festuca Species |
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| Source: | Weed Science. Vol. 37, No. 4, July 1989, p. 512-516. |
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| Publishing Information: | Champaign, IL: Weed Science Society of America |
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| Keywords: | TIC Keywords: Festuca rubra subsp. rubra; Festuca arundinacea; Festuca rubra var. genuina; Sethoxydim; Haloxyfop; Resistance
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| Abstract/Contents: | "In greenhouse studies, the calculated I50 (herbicide application resulting in 50% inhibition of shoot regrowth) in tall fescue was approximately 0.004 kg/ha for both sethoxydim and haloxyfop. In red fescue, the I50 for sethoxydim and haloxyfop was 9,4 kg/ha and 0.04 kg/ha, respectively. As measured in crude cell extracts of tall fescue, incorporation of 14C-acetyl-coenzyme A into fatty acids was inhibited 62 and 71% by 10 uM sethoxydim and 10 uM haloxyfop respectively. In red fescue, 10 uM haloxyfop inhibited 14C-acetyl-CoA incorporation into fatty acids by 29%, whereas 10 uM sethoxydim had no effect. The I50 for inhibition of acetyl-coenzyme A carboxylase activity in tall fescue with sethoxydim and haloxyfop was 6.9 and 5.8 uM, respectively. In red fescue the I50 for haloxyfop was 118 uM. Sethoxydim concentrations as high as 1 mM had little effect on acetyl-coenzyme A carboxylase activity in red fescue. These results suggest that acetyl-coenzyme A carboxylase is a sensitive site of action for sethoxydim and haloxyfop in tall fescue, and that tolerance to these herbicides in red fescue is due to the presence of a more tolerant form of the enzyme." |
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| Language: | English |
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| References: | 22 |
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| Note: | Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Stoltenberg, D. E., J. W. Gronwald, D. L. Wyse, J. D. Burton, D. A. Somers, and B. G. Gengenbach. 1989. Effect of Sethoxydim and Haloxyfop on Acetyl-Coenzyme A Carboxylase Activity in Festuca Species. Weed Sci. 37(4):p. 512-516. |
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MSU catalog number: SB 610 .W38 |
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