Mechanism of diclofop resistance in an Italian ryegrass (Lolium multiflorum Lam.) biotype

Gronwald, John W.; Eberlein, Charlotte V.; Betts, Kevin J.; Baerg, Roger J.; Ehlke, Nancy; Wyse, Donald L.

doi:10.1016/0048-3575(92)90110-l

Cited by 75 publications

(64 citation statements)

References 28 publications

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“…For example, the presence of an insen- sitive form of ACCase has been documented in blackgrass (Alopercurus myosuroides) (Cocker et al 1999), wild oat (Avena fatua) (Seefeldt et al 1996), sterile oat (Avena sterilis spp. ludoviciana) (Maneechote et al 1994(Maneechote et al , 1997Shukla et al 1997a), smooth crabgrass (Digitaria ischaemum) (Kuk et al 1999), goosegrass (Eleusine indica) (Leach et al 1995), Italian ryegrass (Lolium multiforum) (Gronwald et al 1992), rigid ryegrass (Lolium rigidum) (Tardif et al 1993), littleseed canarygrass (Phalaris minor) (Tal et al 1996), giant foxtail (Setaria faberi) (Shukla et al 1997b), and green foxtail (Setaria viridis) (Shukla et al 1997b).…”

Section: Discussionmentioning

confidence: 99%

“…A common feature of evolved resistance to ACCase herbicides is that there can be quite different patterns of resistance within or across both APP and CHD herbicides. Target site-based resistance because of a resistant ACCase enzyme is frequently responsible for resistance (Cocker et al 1999;Gronwald et al 1992;Kuk et al 1999;Leach et al 1995;Maneechote et al 1994Maneechote et al , 1997Seefeldt et al 1996;Shukla et al 1997aShukla et al , 1997b. There are now four mutations of the ACCase gene known to endow resistance to certain APP and CHD herbicides (Brown et al 2002;Christoffers et al 2002;Delye et al 2002Delye et al , 2003Zagnitko et al 2001).…”

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confidence: 99%

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Resistance to ACCase-inhibiting herbicides in sprangletop (Leptochloa chinensis)

Maneechote¹,

Samanwong²,

Zhang

et al. 2005

Weed Science

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This study reports evolved resistance to fenoxaprop-P in a population of sprangletop from a rice field in Thailand (BLC1). After eight applications of fenoxaprop-P, the herbicide appeared no longer effective. To confirm herbicide resistance in the BLC1 population, three experiments were conducted. First, glasshouse experiments revealed that the BLC1 population survived 600 g ai ha-1 of fenoxaprop-P without visual injury. Second, the BLC1 population was treated with fenoxaprop-P and other acetyl coenzyme A carboxylase (ACCase)-inhibiting herbicides (quizalofop-P, cyhalofopbutyl, and profoxydim) under field conditions; BLC1 exhibited resistance to all of these herbicides. Third, seeds of susceptible SLC1 and resistant BLC1 were germinated on 0.6% (v/v) agar across a range of herbicide concentrations. The resistant BLC1 population exhibited 61-, 44-, 9-and 8-fold resistance to fenoxaprop-P, cyhalofop, quizalofop-P, and profoxydim, respectively, compared with a susceptible SLC1 population. At the enzyme level, ACCase from the resistant BLC1 exhibited 30, 24, 11, 4, and 5 times resistance to fenoxaprop, cyhalofop-butyl, haloxyfop, clethodim, and cycloxydim, respectively. The spectrum of resistance at the whole plant level correlated well with resistance at the ACCase level. Hence, the mechanism of resistance to ACCase-inhibiting herbicides in this biotype of sprangletop is a herbicide-resistant ACCase. The specific mutation(s) of the ACCase gene that endows resistance in this population remains to be investigated.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Resistance to ACCase-inhibiting herbicides in sprangletop (Leptochloa chinensis)

Maneechote¹,

Samanwong²,

Zhang

et al. 2005

Weed Science

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“…needed for 50% enzyme inhibition) that were 28-, 9-and 10-times higher than for ACCase from a susceptible biotype. There was no cross-resistance to the CHD herbicides sethoxydim or clethodim [32]. ACCase resistance was subsequently also confirmed for L. multiflorum biotypes from other countries.…”

Section: Inhibitors Of Photosystem II (Ps Ii)mentioning

confidence: 61%

HRAC Classification of Herbicides and Resistance Development

Menne¹,

Köcher²

2007

Modern Crop Protection Compounds

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“…Resistance to these herbicides also has been reported in grasses. In a naturally occurring biotype ofLolium multiflorum Lam., resistance to diclofop was associated with a 15-fold decrease in acetyl-CoA carboxylase sensitivity as compared to the susceptible biotype (5). Similarly, the sensitivity of acetyl-CoA carboxylase activity to inhibition by haloxyfop in Festuca rubra L., which is a haloxyfop-tolerant grass species, was 20-fold less than the same enzyme in haloxyfop-sensitive Festuca arundinacea Schreb (23).…”

Section: Discussionmentioning

confidence: 95%

Effects of Diclofop and Diclofop-Methyl on Membrane Potentials in Roots of Intact Oat, Maize, and Pea Seedlings

DiTomaso¹,

Brown²,

Stowe³

et al. 1991

Plant Physiol.

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Growth and electrophysiological studies in roots of intact diclofop-methyl susceptible and resistant seedlings were conducted to test the hypothesis that the herbicide acts primarily as a proton ionophore. The ester formulafton of diclofop, at 0.2 micromolar, completely inhibited root growth in herbicide-susceptible oat (Avena Lucas et al. (16) and later revised by Wright and Shimabukuro (25), the ester form of diclofop crosses the plasmalemma and is rapidly hydrolyzed to the free acid form. This undissociated acid then releases a proton on the cytoplasmic side of the membrane. The deprotonated anionic species then moves back across the plasmalemma to the apoplasmic side in response to the root-cell Em (inside negative) and is again protonated. This cycle is repeated until the proton gradient is dissipated and could eventually lead to a reduction in cellular ATP levels by short circuiting the proton-translocating plasmalemma ATPase. The diclofop concentration causing half-maximal depolarization of the Em in excised and peeled oat coleoptiles was determined to be 10 to 20 jtM (25). Ratterman and Balke (20)

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Mechanism of diclofop resistance in an Italian ryegrass (Lolium multiflorum Lam.) biotype

Cited by 75 publications

References 28 publications

Resistance to ACCase-inhibiting herbicides in sprangletop (Leptochloa chinensis)

Resistance to ACCase-inhibiting herbicides in sprangletop (Leptochloa chinensis)

HRAC Classification of Herbicides and Resistance Development

Effects of Diclofop and Diclofop-Methyl on Membrane Potentials in Roots of Intact Oat, Maize, and Pea Seedlings

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