No fitness cost of glyphosate resistance endowed by massive EPSPS gene amplification in Amaranthus palmeri

Mostrar otras versiones (1)

Amplification of the EPSPS gene has been previously identified as the glyphosate resistance mechanism in many populations of Amaranthus palmeri, a major weed pest in US agriculture. Here, we evaluate the effects of EPSPS gene amplification on both the level of glyphosate resistance and fitness cost...

Descripción completa

Guardado en:
Detalles Bibliográficos
Otros Autores: Vila Aiub, Martín Miguel, Goh, Sou Sheng, Gaines, Todd A., Han, Heping, Busi, Roberto, Yu, Qin, Powles, Stephen B.
Formato: Artículo
Lenguaje:Español
Materias:
3 PHOSPHOSHIKIMATE 1 CARBOXYVINYLTRANSFERASE
AMARANTHUS
AMARANTHUS PALMERI
BIOMASS
DRUG DERIVATIVE
DRUG EFFECT
ENZYMOLOGY
EVOLUTION
EVOLUTION, MOLECULAR
FITNESS TRAITS
GENE AMPLIFICATION
GENE DOSAGE
GENE OVER-EXPRESSION
GENETICS
GLYCINE
GLYPHOSATE
HERBICIDE
HERBICIDE RESISTANCE
HERBICIDES
MOLECULAR EVOLUTION
PHYSIOLOGY
TARGET-SITE RESISTANCE
WEEDS
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2014vilaaiub.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
Biblioteca Central (FAUBA) de Universidad de Buenos Aires
Descripción
Sumario:Amplification of the EPSPS gene has been previously identified as the glyphosate resistance mechanism in many populations of Amaranthus palmeri, a major weed pest in US agriculture. Here, we evaluate the effects of EPSPS gene amplification on both the level of glyphosate resistance and fitness cost of resistance. A. palmeri individuals resistant to glyphosate by expressing a wide range of EPSPS gene copy numbers were evaluated under competitive conditions in the presence or absence of glyphosate. Survival rates to glyphosate and fitness traits of plants under intra-specific competition were assessed. Plants with higher amplification of the EPSPS gene [53-fold] showed high levels of glyphosate resistance, whereas less amplification of the EPSPS gene [21-fold] endowed a lower level of glyphosate resistance. Without glyphosate but under competitive conditions, plants exhibiting up to 76-fold EPSPS gene amplification exhibited similar height, and biomass allocation to vegetative and reproductive organs, compared to glyphosate susceptible A. palmeri plants with no amplification of the EPSPS gene. Both the additive effects of EPSPS gene amplification on the level of glyphosate resistance and the lack of associated fitness costs are key factors contributing to EPSPS gene amplification as a widespread and important glyphosate resistance mechanism likely to become much more evident in weed plant species.
ISSN:0032-0935

Ejemplares similares