The Role of Compartmentation of Herbicides and Their Metabolites in Resistance Mechanisms

Coupland, D.

doi:10.1016/b978-0-7506-1101-5.50021-8

Cited by 13 publications

(5 citation statements)

References 59 publications

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“…Glucose conjugates of numerous other classes of herbicides are also known to be inactive at their respective target sites 9. Furthermore, glucose conjugates of xenobiotics are also thought to be compartmentalised in plant vacuoles, which may account for the relatively poor redistribution from treated areas in wheat 10…”

Section: Discussionmentioning

confidence: 99%

Uptake, translocation and metabolism of the herbicide florasulam in wheat and broadleaf weeds

deBoer¹,

Thornburgh²,

Ehr³

2006

Pest Management Science

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Florasulam is a triazolopyrimidine sulfonanilide post-emergence broadleaf herbicide for use in wheat (Triticum aestivum L.). The selectivity of florasulam to wheat has been determined to be related primarily to a differential rate of metabolism between wheat with a half-life of 2.4 h and broadleaf weeds with half-lives ranging from 19 to >48 h. To a lesser extent, selectivity, at least for the broadleaf weed cleavers (Galium aparine L.), involves uptake differences. Rate of metabolism data were generated using greenhouse-grown plants injected with radiolabelled florasulam and subsequent extraction and processing by high-performance liquid chromatography (HPLC). Structures of metabolites were determined by isolation for nuclear magnetic resonance and liquid chromatography/mass spectrometry. Wheat plants metabolised florasulam by hydroxylation of the aniline ring para to the nitrogen, followed by conjugation to glucose. Metabolism by broadleaf weeds was so slow that isolation of metabolite was not possible, but comparison of HPLC data suggested hydroxylation as the major pathway.

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Section: Discussionmentioning

confidence: 99%

Uptake, translocation and metabolism of the herbicide florasulam in wheat and broadleaf weeds

deBoer¹,

Thornburgh²,

Ehr³

2006

Pest Management Science

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“…This results in stoppage of CO 2 fixation and production of ATP and NADPH 2 , which are all required for plant growth. Linuron affects photosystem II in a similar manner to atrazine (Coupland 1991;Gronwald 1994;Moss and Rubin 1993;but see Smeda et al 1993), and many linuron-resistant weed biotypes are cross-resistant to atrazine (Fuerst et al 1986;Masabni and Zandstra 1999a). In experiment 2, lower linuron rates were used to determine the herbicide rate-response curve for the S-biotype that was required for calculating the linuron RR and also to verify for possible cross-resistance to atrazine.…”

Section: Resultsmentioning

confidence: 99%

A Common Ragweed (Ambrosia artemisiifolia) Biotype in Southwestern Québec Resistant to Linuron

Saint-Louis¹,

DiTommaso²

2005

Weed technol.

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The degree of resistance to linuron of a common ragweed biotype was investigated. Suspected linuron-resistant plants collected from a carrot field near Sherrington, Québec, were subjected to increasing rates of linuron under glasshouse conditions. Resistance to linuron of the common ragweed biotype was suspected because 33% of plants survived to reproduction after they were sprayed at a rate of 4.5 kg ai/ha, two times the dose rate recommended for linuron in carrots, and also because 3% of plants survived to reproduction after they were sprayed at a rate of 22.5 kg ai/ ha, 10 times the recommended dose. Susceptible plants collected from a field with no prior history of linuron use were all killed when sprayed at the lowest dose rate recommended, 1.125 kg ai/ha. The herbicide-resistance ratio was 29.0 for linuron, and for cross-resistance to atrazine, the ratio was 1.3, indicating that these plants exhibit greater resistance to linuron than to atrazine.

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“…A compartimentalização pode ser alcançada pelo armazenamento desses herbicidas ou de seus metabólitos tóxicos no vacúolo das células ou tecidos localizados distantes dos sítios de ação do herbicida (Compland, 1991). Este tipo de mecanismo tem sido sugerido como um dos mais importantes na resistência de plantas daninhas ao herbicida paraquat, excluindo-o assim do sítio de ação no clomplasto.…”

Section: Departamentalização Ou Compartimentalizaçãounclassified

Resistência de plantas daninhas aos herbicidas

1994

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A resistência de plantas daninhas aos herbicidas ocorre em função de um processo evolutivo. O desenvolvimento de biótipos de plantas daninhas resistentes é imposto pela agricultura moderna, através da pressão de seleção causada pelo uso intensivo dos herbicidas. O conhecimento dos mecanismos e fatores que favorecem o aparecimento de bió-tipos de plantas daninhas resistentes é fundamental para que técnicas de manejo sejam utilizadas no sentido de evitar ou retardar o aparecimento de plantas resistentes em uma área. São poucos os relatos ou citações de literatura no Brasil. Sendo assim, este trabalho de revisão procura relatar os principais avanços e descobertas na área de plantas daninhas resistentes aos herbicidas.Palavras-chave: desenvolvimento de resistência. ABSTRACT Weed resistance to herbicidesWeed herbicide resistance has evolved from weed evolution. The modern agriculture is responsible for this evolution because of the intensive use of herbicides. The knowledge of mechanisms and factors that influence the weed herbicide resistance play an important role in the weed manegement techniques used to avoid or delay herbicide resistance appearence. There are not many report or scientific paper s about herbi cide resistance in Brasil. Therefore, this literature review aims to provide information about the main advances and discoveries in the field of weed herbicide resistance.Additional index words: resistance development. INTRODUÇÃOAs plantas daninhas surgiram de um processo dinâmi-co de evolução ao adaptarem-se às perturbações ambientais provocadas pela natureza ou pelo homem através da agricultura. Esta evolução continua até hoje em resposta à modernização da agricultura. Dentre as modernas técnicas usadas na agricultura, os herbicidas aplicados no controle das plantas daninhas têm proporcionado uma evolução bastante rápida das mesmas, tornando-as, em algumas situações, resistentes a estes prod utos químico s. A evolução da pop ulaç ão de plantas daninhas resistentes aos herbicidas é um problema crescente em muitos países. Sendo assim, muitos trabalhos de pesquisa têm sido conduzidos, especialmente nos últimos dez anos, procurando estudar distribuição, mecanismos de 1 Recebido para publicação em 29/10/93 e na forma revisada em 01/12/93 2 Prof. Doutor, Dept°Horticultura, ESALQ-USP, Piracicaba, SP 3 Prof. Titular, Dept°Horticultura, ESALQ-USP, Piracicaba, SP 4 Académico e Estagiário Dept°Horticultura, ESALQ-USP, Piracicaba, SP resistê ncia , genétic a e manejo dessas pop ulaç ões. Desta forma, o objetivo deste trabalho é de fornecer uma revisão concisa de alguns dos mais importantes avanços e descobertas recentes, relacionados com a evolução de biótipos de plantas daninhas resistentes aos herbicidas. RESISTÊNCIA DE PLANTAS DANINHAS AOS HERBICIDAS DEFINIÇÕESExiste muita confusão na literatura sobre resistência de plantas daninhas aos herbicidas, quanto ao uso dos termos "resistência" e "tolerância". Erroneamente às vezes estes termos são usados indistintamente por algumas pessoas. Para este trabalho de revisão é...

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The Role of Compartmentation of Herbicides and Their Metabolites in Resistance Mechanisms

Cited by 13 publications

References 59 publications

Uptake, translocation and metabolism of the herbicide florasulam in wheat and broadleaf weeds

Uptake, translocation and metabolism of the herbicide florasulam in wheat and broadleaf weeds

A Common Ragweed (Ambrosia artemisiifolia) Biotype in Southwestern Québec Resistant to Linuron

Resistência de plantas daninhas aos herbicidas

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