Do plants pay a fitness cost to be resistant to glyphosate?

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We reviewed the literature to understand the effects of glyphosate resistance on plant fitness at the molecular, biochemical and physiological levels. A number of correlations between enzyme characteristics and glyphosate resistance imply the existence of a plant fitness cost associated with resista...

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Detalles Bibliográficos
Autor principal: Vila Aiub, Martín Miguel
Otros Autores: Yu, Qin, Powles, Stephen B.
Formato: Artículo
Lenguaje:Inglés
Materias:
ENERGY COST BUDGET
EPSPS
FITNESS COST
GENE AMPLIFICATION
GLYPHOSATE
PLANT ADAPTATION
TARGET-SITE MUTATIONS
Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2019vilaaiub.pdf
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 University of Western Australia (UWA). Australian Herbicide Resistance Initiative (AHRI) – School of Agriculture and Environment. Australia.  |u Universidad de Buenos Aires. Facultad de Agronomía. Departamento de Recursos Naturales y Ambiente. Cátedra de Ecología. Buenos Aires, Argentina.  |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. 
245 0 0 |a Do plants pay a fitness cost to be resistant to glyphosate? 
520 |a We reviewed the literature to understand the effects of glyphosate resistance on plant fitness at the molecular, biochemical and physiological levels. A number of correlations between enzyme characteristics and glyphosate resistance imply the existence of a plant fitness cost associated with resistance-conferring mutations in the glyphosate target enzyme, 5-enolpyruvylshikimate- 3-phosphate synthase (EPSPS). These biochemical changes result in a tradeoff between the glyphosate resistance of the EPSPS enzyme and its catalytic activity. Mutations that endow the highest resistance are more likely to decrease catalytic activity by reducing the affinity of EPSPS for its natural substrate, and/or slowing the velocity of the enzyme reaction, and are thus very likely to endow a substantial plant fitness cost. Prediction of fitness costs associated with EPSPS gene amplification and overexpression can be more problematic. The validity of cost prediction based on the theory of evolution of gene expression and resource allocation has been cast into doubt by contradictory experimental evidence. Further research providing insights into the role of the EPSPS cassette in weed adaptation, and estimations of the energy budget involved in EPSPS amplification and overexpression are required to understand and predict the biochemical and physiological bases of the fitness cost of glyphosate resistance. 
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653 |a ENERGY COST BUDGET 
653 |a EPSPS 
653 |a FITNESS COST 
653 |a GENE AMPLIFICATION 
653 |a GLYPHOSATE 
653 |a PLANT ADAPTATION 
653 |a TARGET-SITE MUTATIONS 
700 1 |a Yu, Qin  |u University of Western Australia (UWA). Australian Herbicide Resistance Initiative (AHRI) – School of Agriculture and Environment. Australia.  |9 67249 
700 1 |9 67250  |a Powles, Stephen B.  |u University of Western Australia (UWA). Australian Herbicide Resistance Initiative (AHRI) – School of Agriculture and Environment. Australia. 
773 0 |t New phytologist  |w SECS001166  |g Vol.223, no.2 (2019), p.532-547, grafs., tbls., fot., il. 
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