Propaquizafop Absorption, Translocation, Metabolism, and Effect on Acetyl-CoA Carboxylase Isoforms in Chickpea (Cicer arietinum L.)

Giménez-Espinosa, Rosa; Plaisance, Kathryn L.; Plank, David W.; Gronwald, John W.

doi:10.1006/pest.1999.2431

Cited by 11 publications

(6 citation statements)

References 23 publications

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“…The tolerance of crops to ACCase inhibiting herbicides has been reported mainly through three mechanisms. The first, and most common mechanism, is that in several eudicotyledonous species the ACCase enzyme is eukaryotic and insensitive to the herbicides (Gimenez-Espinosa et al, 1999). The second mechanism is the differential metabolism of herbicides, which are transformed into nontoxic forms (De Prado et al, 2000;Preston & Mallory-Smith, 2001).…”

Section: Herbicide Selectivity In Alfalfa Cropsmentioning

confidence: 99%

Herbicide selectivity in alfalfa crops

et al. 2013

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-This study aimed to determine the selectivity of herbicides applied in pre-and post-emergence for alfalfa crops. Three separate experiments were carried out under greenhouse conditions. The first experiment was arranged in a completely randomized design with three replications in a 4 x 11 + 1 factorial scheme , with eleven herbicides (bentazon, chlorimuron-ethyl, fomesafen, fluazifop-p-butyl, saflufenacil, imazethapyr, clethodim, nicosulfuron, imazaquin, haloxyfop-methyl and MSMA), four doses of each herbicide (0.5 D, 0.75 D, 1.0 D and 1.25 D, where D = recommended dose), plus an untreated control. The products were applied to alfalfa plants at the stage of 4 to 5 leaf pairs. In the second experiment, the effect of pre-emergent herbicides on early alfalfa development was observed through a completely randomized design with five replications in a 3 x 4 x 2 factorial scheme, with three herbicides (hexazinone, atrazine + simazine, S-metolachlor), four doses (0.5 D, 0.75 D, 1.0 D and 1.25 D), and two types of soil texture (loamy and clay soil), plus an untreated control. The third experiment evaluated the action of atrazine, 2,550 g ha -1 ; clomazone -600 g ha -1 ; diclosulam -25 g ha -1 ; diuron+hexazinone -936 + 264 g ha -1 and diuron+hexazinone +sulfometuron -1,386 + 391 + 33.35 g ha -1 on alfalfa sown at different times after herbicide application. The effects of the treatments on alfalfa were evaluated according to visual phytotoxicity symptoms, plant height, and biomass of roots and shoots. Among the herbicides applied at post-emergence, imazethapyr, clethodim, haloxyfop-p-methyl and MSMA were selective for alfalfa, while among those applied at pre-emergence, none were selective, regardless of soil texture. The results of the third experiment showed that the herbicides diclosulam, hexazinone + diuron and atrazine caused less toxicity in alfalfa plants.Keywords: phytotoxicity, Medicago sativa, residual period. (bentazon, chlorimuron-ethyl, fomesafen, fluazifop-p-butil, saflufenacil, imazethapyr, cletodim, nicosulfuron, imazaquim, haloxyfop-methyl e MSMA), quatro doses de cada herbicida (0,5D, 0,75D, 1,0D e 1,25D, sendo D = dose comercial) RESUMO -O objetivo desta pesquisa foi verificar a seletividade de herbicidas aplicados em pré e pós-emergência para a cultura da alfafa. Esta pesquisa foi composta por três experimentos distintos, realizados em casa de vegetação. O primeiro experimento foi conduzido em delineamento experimental inteiramente casualizado com três repetições, em esquema fatorial 11 x 4+1, sendo onze herbicidas

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Section: Herbicide Selectivity In Alfalfa Cropsmentioning

confidence: 99%

Herbicide selectivity in alfalfa crops

et al. 2013

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“…Selectivity in broadleaf crops has been related mainly to three possible mechanisms. First, in most dicotyledon species, selectivity of these herbicides results from an insensitive target ACCase enzyme of prokaryotic origin (Konishi and Sasaki 1994;Shorrosh et al 1995;Gime´nez-Espinosa et al 1999), whereas certain grasses are resistant to AOPP and CHD herbicides as a result of an altered ACCase of an eukaryotic origin (Evenson et al 1997;De Prado et al 2000;De´lye et al 2003). Second, the differential metabolism of the herbicide to non toxic forms (Mene´ndez and De Prado 1996;De Prado et al 1998;Preston and Mallory-Smith 2001) has been widely described, and the use of safeners selectively protecting crop plants from herbicide damage without reducing activity in target weed species has been reported.…”

Section: Introductionmentioning

confidence: 99%

Basis of selectivity of cyhalofop-butyl in Oryza sativa L.

Ruiz-Santaella

Heredia

Prado

2005

Planta

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Cyhalofop-butyl (CB), 2-[4-(4-cyano-2-fluorophenoxy)phenoxy]propanoic acid, butyl ester (R), is an aryloxyphenoxypropionate (AOPP) herbicide for postemergence use in rice to control grasses, mainly Echinochloa spp. Similar to other AOPP and cyclohexanedione herbicides, the site of action of CB is acetyl-coenzyme A carboxylase (ACCase), an enzyme in fatty acid biosynthesis. The mechanisms involved in the selectivity of CB in rice (Oryza sativa L.)-absorption, translocation, metabolism, and ACCase susceptibility-were studied. Studies of in vitro inhibition of ACCase in E. oryzoides and O. sativa L. species discounted any differential active site sensitivity as the basis of tolerance to CB. The O. sativa L. cuticle was uniformly covered by waxes, with predominantly unshaped large waxes randomly distributed, obtaining absorption values of under 30%, 24 h after application (HAA). The E. oryzoides cuticle formed a non-uniform covered reticule, with less wax density and areas lacking in waxes reaching maximum values of absorption rising to 73%, 24 HAA. Translocation studies revealed no significant differences, either between species, or between times, remaining in the treated leaf. There was a good correlation between the rate of metabolism and plant tolerance. Plant metabolism studies demonstrated that tolerant rice inactivated the esterases producing a lack of functionality thus reducing the conversion of CB to cyhalofop acid, which is the active form of the herbicide. Moreover, it increased the metabolism of the herbicide forming non toxic metabolites much faster than E. oryzoides. It was concluded that the basis of rice tolerance to CB was a lack of esterase functionality, a reduced absorption through the cuticle and an increase in cyhalofop acid metabolism.

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“…Selectivity in broadleaf crops and resistance in grass weeds to AOPP and CHD herbicides has been related mainly to three possible mechanisms. First, in most dicotyledon species, selectivity of these herbicides results from an insensitive target ACCase enzyme (EC 6.4.1.2) of prokaryotic origin (Gimenez-Espinosa et al 1999;Konishi and Sasaki 1994;Shorrosh et al 1995), whereas certain grasses are resistant to AOPP and CHD herbicides as a result of an altered ACCase that is of eukaryotic origin (De Prado et al 2000a;Evenson et al 1997). Second, the differential metabolism of the herbicide to nontoxic forms (De Prado et al 1998;Menéndez and De Prado 1996;Preston and Mallory-Smith 2001).…”

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confidence: 99%

Resistance to ACCase inhibitor herbicides in a green foxtail (Setaria viridis) biotype in Europe

Osuna

Fischer

2004

Weed sci.

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A biotype of green foxtail found in Spain exhibited cross-resistance among acetyl-CoA carboxylase (ACCase)–inhibiting herbicides. Field doses that totally inhibited shoot fresh weight in the susceptible (S) biotype were determined for six aryloxyphenoxypropionates (clodinafop, diclofop, fenoxaprop-P, fluazifop-P, haloxyfop-P, and propaquizafop) and six cyclohexanediones (clefoxydim, clethodim, cycloxydim, sethoxydim, tepraloxydim, and tralkoxydim). The resistant (R) biotype showed cross-resistance to all herbicides except fenoxaprop-P, propaquizafop, clefoxydim, and tepraloxydim. There were no differences in the absorption, translocation, and metabolism of [14C]diclofop between the S and R biotypes. On the basis of herbicide dose that inhibited ACCase activity by 50% (I50values), ACCase of the R biotype was 5.8-, 13.9-, 20.0-, 102.4-, 416.7-, and 625.0-fold less sensitive to clethodim, haloxyfop, diclofop, fluazifop, cycloxydim, and sethoxydim, respectively, than that of the S biotype. Two multifunctional ACCase isoforms (ACCase I and ACCase II) were purified partially and separated. ACCase II was highly resistant to diclofop acid in both biotypes, with I50values ranging between 92 and 95 μM. However, the I50values observed for ACCase I revealed that the R biotype was 30.8-fold less sensitive to diclofop than the S biotype. These results suggest the mechanism of resistance in green foxtail to diclofop relates to an altered ACCase I isoform.

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Propaquizafop Absorption, Translocation, Metabolism, and Effect on Acetyl-CoA Carboxylase Isoforms in Chickpea (Cicer arietinum L.)

Cited by 11 publications

References 23 publications

Herbicide selectivity in alfalfa crops

Herbicide selectivity in alfalfa crops

Basis of selectivity of cyhalofop-butyl in Oryza sativa L.

Resistance to ACCase inhibitor herbicides in a green foxtail (Setaria viridis) biotype in Europe

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