The role of plant size in the selection of glyphosate resistance in Sorghum halepense

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The effect of plant size (seedlings versus young plants versus adult plants) on the phenotypic level of glyphosate resistance and selection intensity (SI) in Sorghum halepense with and without a reduced glyphosate translocation resistance mechanism was evaluated. RESULTS: Resistance parameters [the...

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Detalles Bibliográficos
Autor principal: Vila Aiub, Martín Miguel
Otros Autores: Casas, Cecilia, Gundel, Pedro Emilio
Formato: Artículo
Lenguaje:Inglés
Materias:
AGROECOSYSTEM
PERENNIAL SPECIES
FITNESS
RESISTANCE TRAIT
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2018vilaaiub.pdf
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LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
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100 1 |9 9201  |a Vila Aiub, Martín Miguel  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u University of Western Australia (UWA). School of Agriculture and Environment. Crawley, Australia. 
245 0 0 |a The role of plant size in the selection of glyphosate resistance in Sorghum halepense 
520 |a The effect of plant size (seedlings versus young plants versus adult plants) on the phenotypic level of glyphosate resistance and selection intensity (SI) in Sorghum halepense with and without a reduced glyphosate translocation resistance mechanism was evaluated. RESULTS: Resistance parameters [the 50% lethal dose (LD50) and the dose required to cause a 50% reduction in plant growth (GR50)] in adult plantswere notably higher than in seedlings regardless of the resistance status.However, under similar plant size increases, populations comprised of glyphosate-resistant (R) individuals showed higher survival and growth when glyphosate treated comparedwith glyphosate-susceptible (S) plants.An increase in SIwas always evidentwith increasing glyphosate doses. However, the rate of increase in SI was higher under glyphosate selection of young R and S plants, followed by seedlings and adult R and S plants. However, in conditions of R seedlings coexisting with adult S plants under glyphosate treatment (1000–4000 g ha−1), selection against glyphosate resistance was observed. CONCLUSION: Any increase in size fromthe seedling stage of R plants translates into an amplification of resistance. Depending on the particular size combinations of spatially coexisting R and S plants, selection for glyphosate resistance may be faster, slower or even not evident. 
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700 1 |9 4644  |a Casas, Cecilia  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Recursos Naturales y Ambiente. Cátedra de Edafología. Buenos Aires, Argentina.  |u Technische Universität München. Lehrstuhl für Grünlandlehre. Freising-Weihenstephan, Germany. 
700 1 |9 28667  |a Gundel, Pedro Emilio  |u Universidad de Buenos Aires. Facultad de Agronomía. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina.  |u CONICET – Universidad de Buenos Aires. Instituto de Investigaciones Fisiológicas y Ecológicas Vinculadas a la Agricultura (IFEVA). Buenos Aires, Argentina. 
773 |t Pest Management Science  |g vol.74, no.11 (2018), p.2460-2467, tbls., grafs. 
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