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 | Acceso al texto completo restringido a Biblioteca INIA Treinta y Tres. Por información adicional contacte bibliott@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Treinta y Tres. |
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Fecha actual : |
15/09/2014 |
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Actualizado : |
11/10/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
A - 1 |
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Autor : |
YASOUR, H.; OSUNA, M.D.; ORTIZ, A.; ECKERT, J.W.; FISHER, A.J.; SALDAIN, N. |
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Afiliación : |
NESTOR ELIO SALDAIN CROCCE, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay. |
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Título : |
Mechanism of resistance to penoxsulam in late watergrass [Echinochloa phyllopogon (stapf) koss.]. |
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Fecha de publicación : |
2009 |
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Fuente / Imprenta : |
Journal of Agricultural and Food Chemistry, 2009, v. 57. n. 9, p. 3653-3660. |
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ISSN : |
0021-8561 |
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DOI : |
10.1021/jf8039999 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received for Review December 23, 2008 // Accepted March 11, 2009 // Revised manuscript received March 9, 2009.
DOI: https://doi.org/10.1021/jf8039999 |
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Contenido : |
Abstract
Late watergrass [Echinochloa phyllopogon (Stapf.) Koss.] is a major weed of California rice that has evolved P450-mediated metabolic resistance to multiple herbicides. Resistant (R) populations are also poorly controlled by the recently introduced herbicide penoxsulam. Ratios (R/S) of the R to susceptible (S) GR50 (herbicide rate for 50% growth reduction) ranged from 5 to 9. Although specific acetolactate synthase (ALS) activity was 1.7 higher in R than in S plants, the enzyme in R plants was about 6 times more susceptible to the herbicide. R plants exhibited faster (2.8 times) oxidative [14C]-penoxsulam metabolism than S plants 24 h after treatment. Addition of malathion (P450 inhibitor) enhanced herbicide phytotoxicity and reduced penoxsulam metabolism in R plants. Tank mixtures with thiobencarb (can induce P450) antagonized penoxsulam toxicity in R plants, suggesting penoxsulam may be broken down by a thiobencarb-inducible enzyme. These results suggest E. phyllopogon resistance to penoxsulam is mostly due to enhanced herbicide metabolism, possibly via P450 monooxidation. |
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Thesagro : |
ARROZ; ARROZ IRRIGADO; ECHINOCHLOA PHYLLOPOGON; ESCARDA; HERBICIDAS; PENOXSULAN. |
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Asunto categoría : |
H60 Malezas y escardas |
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Marc : |
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022 $a0021-8561
024 7 $a10.1021/jf8039999$2DOI
100 1 $aYASOUR, H.
245 $aMechanism of resistance to penoxsulam in late watergrass [Echinochloa phyllopogon (stapf) koss.].$h[electronic resource]
260 $c2009
500 $aArticle history: Received for Review December 23, 2008 // Accepted March 11, 2009 // Revised manuscript received March 9, 2009. DOI: https://doi.org/10.1021/jf8039999
520 $aAbstract Late watergrass [Echinochloa phyllopogon (Stapf.) Koss.] is a major weed of California rice that has evolved P450-mediated metabolic resistance to multiple herbicides. Resistant (R) populations are also poorly controlled by the recently introduced herbicide penoxsulam. Ratios (R/S) of the R to susceptible (S) GR50 (herbicide rate for 50% growth reduction) ranged from 5 to 9. Although specific acetolactate synthase (ALS) activity was 1.7 higher in R than in S plants, the enzyme in R plants was about 6 times more susceptible to the herbicide. R plants exhibited faster (2.8 times) oxidative [14C]-penoxsulam metabolism than S plants 24 h after treatment. Addition of malathion (P450 inhibitor) enhanced herbicide phytotoxicity and reduced penoxsulam metabolism in R plants. Tank mixtures with thiobencarb (can induce P450) antagonized penoxsulam toxicity in R plants, suggesting penoxsulam may be broken down by a thiobencarb-inducible enzyme. These results suggest E. phyllopogon resistance to penoxsulam is mostly due to enhanced herbicide metabolism, possibly via P450 monooxidation.
650 $aARROZ
650 $aARROZ IRRIGADO
650 $aECHINOCHLOA PHYLLOPOGON
650 $aESCARDA
650 $aHERBICIDAS
650 $aPENOXSULAN
700 1 $aOSUNA, M.D.
700 1 $aORTIZ, A.
700 1 $aECKERT, J.W.
700 1 $aFISHER, A.J.
700 1 $aSALDAIN, N.
773 $tJournal of Agricultural and Food Chemistry, 2009$gv. 57. n. 9, p. 3653-3660.
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