Metabolism of chlorsulfuron by plants: Biological basis for selectivity of a new herbicide for cereals

Sweetser, Philip B.; Schow, G.S.; Hutchison, J.M.S.

doi:10.1016/0048-3575(82)90121-3

Cited by 194 publications

(140 citation statements)

References 7 publications

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“…These herbicides have many important features. They have high herbicidal acti vj ties al extremely low rates of application, expressed as g/ha, (10 to 40 g/ha) as opposed to most herbicides currently marketed, which are expressed as kg/ha (Sweetser et al, 1982;Chaleff and Ray, 1984). This is the equivalent of one to two tablespoons of active ingredient per acre (Ray, 1981.).…”

Section: Sulfonylurea Herbicidesmentioning

confidence: 99%

“…Radioactive label studies have shown that after 24 hours, 97% of the radioactivity could be recove-ed as CS from sensi ti ve plants such as sugar beet and cot ton, whereas with wheat and oats, both considered tolerant plants, 95% of the radioactivity had been converted to a non-phytotoxic metabolite (Ray, 1985;Sweetser et al, 1982). Detoxification of the herbicide in tolerant crops is by hydroxylation of the phenyl ring, followed by conjugation with a plant carbohydrate (Sweetser et al, 1982). Chaleff and Mauvais (1984) and Ray (1Y84) analyzed the resistance at the molecular level and have shown that growth inhibit10n in tobacco is caused by CS binding to and inactivating the acetolactate synthas~ enzyme (ALS).…”

Section: (King and Evans 1983)mentioning

confidence: 99%

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The development of sulfonylurea herbicide-resistant birdsfoot trefoil (Lotus corniculatus) plants from in vitro selection

Pofelis

Grant

1992

Theoret. Appl. Genetics

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Section: Sulfonylurea Herbicidesmentioning

confidence: 99%

Section: (King and Evans 1983)mentioning

confidence: 99%

The development of sulfonylurea herbicide-resistant birdsfoot trefoil (Lotus corniculatus) plants from in vitro selection

Pofelis

Grant

1992

Theoret. Appl. Genetics

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“…Contudo, em trigo e aveia, apesar de serem utilizados para controle de plantas daninhas, existe apenas um herbicida do referido mecanismo registrado (metsulfuron-methyl). O mecanismo mais comum de tolerância das culturas aos herbicidas inibidores da ALS é a capacidade da planta de metabolizar a molécula herbicida (Sweester et al, 1982). Entre as reações metabólicas mais comuns, envolvidas na seletividade de culturas aos inibidores da ALS, estão a hidroxilação do anel aromático, a hidroxilação alifática, a desalquilação, a desesterificação e a conjugação.…”

Section: Introductionunclassified

Tolerância de trigo (Triticum aestivum) e aveia (Avena sp.) a herbicidas inibidores da enzima acetolactato sintase (ALS)

et al. 2008

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RESUMO -A caracterização de cultivares quanto à tolerância aos herbicidas representa uma ferramenta adicional na identificação de genes de resistência no melhoramento genético de plantas. Os objetivos do presente trabalho foram determinar a variabilidade genética em genótipos de trigo, aveia-branca e aveia-preta para tolerância a quatro herbicidas inibidores da ALS; identificar herbicidas que não apresentam efeito fitotóxico nas espécies avaliadas; e indicar possíveis genótipos tolerantes para utilização em programas de melhoramento. Os resultados demonstraram a existência de variabilidade genética em trigo para tolerância aos herbicidas inibidores da ALS. O herbicida penoxsulam não apresentou efeito sobre a produção de matéria seca nos genótipos de trigo e aveia. Os genótipos de trigo ICA 7, BRS 208 e CD 111 e a aveia-branca (Albasul) evidenciaram tolerância aos herbicidas bispyribacsodium e penoxsulam; a aveia-preta (Agozebu) também se mostrou tolerante ao metsulfuronmethyl.Palavras-chave: cereais de inverno, cultivares, identificação de genes, seletividade.ABSTRACT -Characterization of genetic tolerance to herbicides is an additional tool in identifying genes related to resistance in plant breeding programs. Thus, the objectives of this research were: to determine the genetic variability in wheat, white and black oat genotypes for tolerance to four ALS-inhibiting herbicides; to identify herbicides that are selective to wheat and oat cultivars; and to identify tolerant genotypes to use in wheat and oat breeding programs at the Universidade Federal de Pelotas. The results showed the existence of genetic variability in wheat for tolerance to ALS-inhibiting herbicides. Penoxsulam had no effect on dry matter production in the evaluated wheat and oat genotypes. Wheat genotypes ICA 7, BRS 208, CD 111, white oat (Albasul) and black oat (Agrozebu) showed tolerance to bispyribac-sodium and penoxsulam. Black oat (Agrozebu), also showed tolerance to metsulfuron-methyl.

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“…Metabolism has been shown to be the basis for crop tolerance to chlorsulfuron (30), but Frear et al (10) found no difference between the rates of chlorsulfuron metabolism in unsafened and NA-protected corn seedlings. The following investigation was to establish whether the protective effect of NA was due to its action on MSM metabolism.…”

Section: Metabolism Of Msm In Com Rootsmentioning

confidence: 99%

Uptake and Phytotoxicity of the Herbicide Metsulfuron Methyl in Corn Root Tissue in the Presence of the Safener 1,8-Naphthalic Anhydride

Milhomme

Bastide²

1990

Plant Physiol.

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Growth of Zea mays L. cv Potro roots was inhibited by the herbicide metsulfuron methyl (MSM) at the lowest concentration tested: 5 nanomoles per liter. Pretreatment of corn seeds with commercial 1,8-naphthalic anhydride (NA) at 1% (w/w) partially reversed MSM-induced root growth inhibition. MSM at a concentration of 52 nanomoles per liter was taken up rapidly by roots and accumulated in the corn tissue to concentrations three times those in the extemal medium; the safener NA increased MSM uptake up to 48 hours. The protective effect of NA was related to the ability of the safener to increase the metabolism of MSM; tenfold increases in the metabolic rates of MSM were observed in NA-pretreated corn seedlings grown for 48 hours on 52 nanomolar[14C]MSM solution. DNA synthesis determined by measurement of [3H]thymidine incorporation into DNA was inhibited by root MSM applications; after a 6-hour application period, 13 nanomolar MSM solution reduced DNA synthesis by 64%, and the same reduction was also observed with NA-pretreated seedlings. Pretreatment of corn seeds with safener NA did not increase the acetolactate synthase activity in the roots and did not change, up to 13 micromoles per liter, the in vitro sensitivity of roots to MSM.MSM' is the active ingredient in Du Pont "Ally"' weed killer. This new sulfonylurea herbicide is active on most vascular plants and is used for weed control in small grains. An important feature of this compound is its high herbicidal activity at extremely low application rates; recommended amounts for weed control in wheat are between 6 and 8 g ai/ha. 'Abbreviations: MSM, metsulfuron methyl (methyl 2-[(I[(4-methoxy-6-methyl-1,3,5-triazin-2-yl) amino] carbonyl} amino) sulfonyl] benzoate); ai, active ingredient; ALS, acetolactate synthase, used in the more general sense of acetohydroxyacid synthase;

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Metabolism of chlorsulfuron by plants: Biological basis for selectivity of a new herbicide for cereals

Cited by 194 publications

References 7 publications

The development of sulfonylurea herbicide-resistant birdsfoot trefoil (Lotus corniculatus) plants from in vitro selection

The development of sulfonylurea herbicide-resistant birdsfoot trefoil (Lotus corniculatus) plants from in vitro selection

Tolerância de trigo (Triticum aestivum) e aveia (Avena sp.) a herbicidas inibidores da enzima acetolactato sintase (ALS)

Uptake and Phytotoxicity of the Herbicide Metsulfuron Methyl in Corn Root Tissue in the Presence of the Safener 1,8-Naphthalic Anhydride

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