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    Both foliar and residual applications of herbicides that inhibit amino acid biosynthesis induce alternative respiration and aerobic fermentation in pea roots

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    Date
    2016
    Author
    Armendáriz García, Óscar Upna
    Gil Monreal, Miriam Upna Orcid
    Zulet González, Amaia Upna
    Zabalza Aznárez, Ana Upna Orcid
    Royuela Hernando, Mercedes Upna Orcid
    Version
    Acceso abierto / Sarbide irekia
    Type
    Artículo / Artikulua
    Version
    Versión aceptada / Onetsi den bertsioa
    Impact
     
     
     
    10.1111/plb.12412
     
     
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    Abstract
    The objective of this work was to ascertain whether there is a general pattern of carbon allocation and utilisation in plants following herbicide supply, independent of the site of application: sprayed on leaves or supplied to nutrient solution. The herbicides studied were the amino acid biosynthesis-inhibiting herbicides (ABIH): glyphosate, an inhibitor of aromatic amino acid biosynthesis, and i ... [++]
    The objective of this work was to ascertain whether there is a general pattern of carbon allocation and utilisation in plants following herbicide supply, independent of the site of application: sprayed on leaves or supplied to nutrient solution. The herbicides studied were the amino acid biosynthesis-inhibiting herbicides (ABIH): glyphosate, an inhibitor of aromatic amino acid biosynthesis, and imazamox, an inhibitor of branched-chain amino acid biosynthesis. All treated plants showed impaired carbon metabolism; carbohydrate accumulation was detected in both leaves and roots of the treated plants. The accumulation in roots was due to lack of use of available sugars as growth was arrested, which elicited soluble carbohydrate accumulation in the leaves due to a decrease in sink strength. Under aerobic conditions, ethanol fermentative metabolism was enhanced in roots of the treated plants. This fermentative response was not related to a change in total respiration rates or cytochrome respiratory capacity, but an increase in alternative oxidase capacity was detected. Pyruvate accumulation was detected after most of the herbicide treatments. These results demonstrate that both ABIH induce the less-efficient, ATP-producing pathways, namely fermentation and alternative respiration, by increasing the key metabolite, pyruvate. The plant response was similar not only for the two ABIH but also after foliar or residual application. [--]
    Subject
    5-enolpyruvylshikimate-3-phosphate synthase, Alternative respiratory pathway, Acetolactate synthase inhibitor, Fermentation, Glyphosate, Imazamox, imidazolinone
     
    Publisher
    Wiley
    Published in
    Plant Biology 18 (2016) 382–390
    Description
    This is the peer reviewed version of the following article: Armendáriz, O., Gil-Monreal, M., Zulet, A., Zabalza, A. and Royuela, M. (2016), Both foliar and residual applications of herbicides that inhibit amino acid biosynthesis induce alternative respiration and aerobic fermentation in pea roots. Plant Biol J, 18: 382–390. doi:10.1111/plb.12412, which has been published in final form at http://dx.doi.org/10.1111/plb.12412. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
    Departament
    Universidad Pública de Navarra. Departamento de Ciencias del Medio Natural / Nafarroako Unibertsitate Publikoa. Natura Ingurunearen Zientziak Saila
     
    Publisher version
    https://dx.doi.org/10.1111/plb.12412
    URI
    https://hdl.handle.net/2454/24070
    Sponsorship
    A. Zulet and M. Gil-Monreal received funding from fellowships through the Ministerio de Educación and Universidad Pública de Navarra, respectively. This work was financially supported by a grant from the Ministerio Español de Economía y Competitividad (AGL-2013-4067R).
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    • Artículos de revista DCMN - NIZS Aldizkari artikuluak [91]
    • Artículos de revista - Aldizkari artikuluak [4926]
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