Full TGIF Record # 65921
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Web URL(s):http://www.bioone.org/bioone/?request=get-document&issn=0043-1745&volume=048&issue=03&page=0311
    Last checked: 11/2005
    Access conditions: Item is within a limited access website
Publication Type:
i
Refereed
Author(s):De Prado, Rafael; González-Gutiérrez, Jacinto; Menéndez, Julio; Gasquez, Jacques; Gronwald, John W.; Giménez-Espinosa, Rosa
Author Affiliation:De Prado, González-Gutiérrez, and Giménez-Espinosa: Depto. de Química Agrícola y Edafología, E.T.S.I.A.M., Universidad de Córdoba, Córdoba, Spain; Menéndez: Depto. de Ciencias Agroforestales, Escuela Politécnica Superior, Universidad de Huelva, Spain; Gasquez: Malherbologie INRA, Dijon, France; Gronwald: USDA-ARS Plant Science Research Unit, St. Paul, MN
Title:Resistance to acetyl CoA carboxylase-inhibiting herbicides in Lolium multiflorum
Section:Physiology, chemistry, and biochemistry
Other records with the "Physiology, chemistry, and biochemistry" Section
Source:Weed Science. Vol. 48, No. 3, May/June 2000, p. 311-318.
Publishing Information:Champaign, IL: Weed Science Society of America
# of Pages:8
Keywords:TIC Keywords: Acetyl-CoA carboxylase inhibitors; Herbicides; Lolium multiflorum; Herbicide resistance; Cyclohexanedione herbicides; Diclofop methyl; Biotypes; Graminicide; Mode of action; Absorption; Translocation; Metabolism; Electrophoresis; Application rates; Haloxyfop; Clethodim; Sethoxydim
Abstract/Contents:"A Lolium multiflorum Lam. biotype resistant to diclofop-methyl was found in a Triticum aestivum field in France (Normandy) that had been treated for several years with diclofop-methyl. Based on plant survival evaluated 21 d after herbicide application, the biotype exhibited a high level of resistance to diclofop-methyl and moderate resistance to CGA-184927-propargil and PP-604. The resistant biotype exhibited a small increase in tolerance to haloxyfop-methyl, quizalofop-ethyl, sethoxydim, and BAS-517-H, but was controlled by recommended field rates for these herbicides. The mechanism of resistance was investigated for diclofop-methyl. There was little or no difference in diclofop-methyl absorption by leaves of resistant and susceptible biotypes measured 48 h after treatment. For both biotypes, less than 1% of absorbed radiolabel was translocated during 48 h following foliar application of ¹⁴C-diclofop-methyl. Metabolism of diclofop-methyl was not significantly altered in the resistant biotype. In both biotypes, diclofop-methyl was rapidly metabolized to diclofop acid followed by a slow rate of formation of a polar conjugate. Two multifunctional acetyl coenzyme A carboxylase isoforms (ACCase I and ACCase II) were isolated from leaf tissue of resistant and susceptible biotypes. Both isoforms exhibited a subunit molecular mass of 203 kDa. For both resistant and susceptible biotypes, ACCase I constituted approximately 80% of total ACCase activity. Graminicide concentrations required to inhibit ACCase activity by 50% (I₅₀ values) were determined for both ACCase isoforms from resistant and susceptible biotypes. The ACCase II isoform was highly resistant to graminicides in both biotypes. In contrast, the I₅₀ value for diclofop inhibition of ACCase I was 19-fold greater for the enzyme isolated from the resistant biotype compared with the susceptible biotype. It is concluded that diclofop resistance in the L. multiflorum biotype from Normandy is caused by the presence of a resistant form of the ACCase I isoform."
Language:English
References:37
Note:Figures
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ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
De Prado, R., J. González-Gutiérrez, J. Menéndez, J. Gasquez, J. Gronwald, and R. Giménez-Espinosa. 2000. Resistance to acetyl CoA carboxylase-inhibiting herbicides in Lolium multiflorum. Weed Sci. 48(3):p. 311-318.
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Web URL(s):
http://www.bioone.org/bioone/?request=get-document&issn=0043-1745&volume=048&issue=03&page=0311
    Last checked: 11/2005
    Access conditions: Item is within a limited access website
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MSU catalog number: SB 610 .W38
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