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    Characterization of the Amaranthus palmeri physiological response to glyphosate in susceptible and resistant populations

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    Date
    2016
    Author
    Fernández Escalada, Manuel Upna
    Gil Monreal, Miriam Upna Orcid
    Zabalza Aznárez, Ana Upna Orcid
    Royuela Hernando, Mercedes Upna Orcid
    Version
    Acceso abierto / Sarbide irekia
    Type
    Artículo / Artikulua
    Version
    Versión aceptada / Onetsi den bertsioa
    Project Identifier
    MINECO//AGL2013-40567-R/ES/ openaire
    Impact
     
     
     
    10.1021/acs.jafc.5b04916
     
     
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    Abstract
    The herbicide glyphosate inhibits the plant enzyme 5-enolpyruvylshikimate3-phosphate synthase (EPSPS) in the aromatic amino acid (AAA) biosynthetic pathway. The physiologies of an Amaranthus palmeri population exhibiting resistance to glyphosate by EPSPS gene amplification (NC-R) and a susceptible population (NC-S) were compared. The EPSPS copy number of NC-R plants was 47.5-fold the copy number ... [++]
    The herbicide glyphosate inhibits the plant enzyme 5-enolpyruvylshikimate3-phosphate synthase (EPSPS) in the aromatic amino acid (AAA) biosynthetic pathway. The physiologies of an Amaranthus palmeri population exhibiting resistance to glyphosate by EPSPS gene amplification (NC-R) and a susceptible population (NC-S) were compared. The EPSPS copy number of NC-R plants was 47.5-fold the copy number of NC-S plants. Although the amounts of EPSPS protein and activity were higher in NC-R plants than in NC-S plants, the AAA concentrations were similar. The increases in total free amino acid and in AAA contents induced by glyphosate were more evident in NC-S plants. In both populations, the EPSPS protein increased after glyphosate exposure, suggesting regulation of gene expression. EPSPS activity seems tightly controlled in vivo. Carbohydrate accumulation and a slight induction of ethanol fermentation were detected in both populations. [--]
    Subject
    Carbohydrate accumulation, Ethanol fermentation, Free amino acid accumulation, Herbicide resistance, Physiological effects
     
    Publisher
    ACS Publications
    Published in
    Journal of Agricultural and Food Chemistry, 2016, 64 (1), pp 95–106
    Description
    Incluye 2 ficheros de datos
    Departament
    Universidad Pública de Navarra. Departamento de Ciencias del Medio Natural / Nafarroako Unibertsitate Publikoa. Natura Ingurunearen Zientziak Saila
     
    Publisher version
    https://dx.doi.org/10.1021/acs.jafc.5b04916
    URI
    https://hdl.handle.net/2454/24071
    Sponsorship
    This work was financially supported by a grant from the Ministerio Español de Economıa y Competitividad (AGL- 2013-40567R). M.F.-E. and M.G.-M. received funding from fellowships through the Universidad Publica de Navarra.
    Appears in Collections
    • Artículos de revista - Aldizkari artikuluak [4926]
    • Artículos de revista DCMN - NIZS Aldizkari artikuluak [91]
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