The possible role of quinate in the mode of action of glyphosate and acetolactate synthase inhibitors

Pest Management Science
Luis OrcarayMercedes Royuela

Abstract

The herbicide glyphosate inhibits the biosynthesis of aromatic amino acids by blocking the shikimate pathway. Imazethapyr and chlorsulfuron are two herbicides that act by inhibiting branched-chain amino acid biosynthesis. These herbicides stimulate secondary metabolism derived from the aromatic amino acids. The aim of this study was to test if they cause any cross-effect in the amino acid content and if they have similar effects on the shikimate pathway. The herbicides inhibiting two different amino acid biosynthesis pathways showed a common pattern in general content of free amino acids. There was a general increase in total free amino acid content, with a transient decrease in the proportion of amino acids whose pathways were specifically inhibited. Afterwards, an increase in these inhibited amino acids was detected; this was probably related to proteolysis. All herbicides caused quinate accumulation. Exogenous application of quinate arrested growth, decreased net photosynthesis and stomatal conductance and was ultimately lethal, similarly to glyphosate and imazethapyr. Quinate accumulation was a common effect of the two different classes of herbicide. Moreover, exogenous quinate application had phytotoxic effects, showing th...Continue Reading

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Citations

Dec 15, 2015·Journal of Agricultural and Food Chemistry·Manuel Fernández-EscaladaMercedes Royuela
Sep 29, 2011·Journal of Plant Physiology·Luis OrcarayMercedes Royuela
Jan 22, 2015·BMC Plant Biology·Isabel FausJose Gadea
Nov 5, 2013·Plant Physiology and Biochemistry : PPB·Amaranta García-GarijoNoel A Tejera
Jul 22, 2016·Planta·Tal ShiloHanan Eizenberg
Dec 19, 2017·Pest Management Science·Arthur Am BarrosoPedro Lca Alves
Oct 27, 2017·Brazilian Journal of Biology = Revista Brasleira De Biologia·P F BatistaK J T Nascimento
Feb 10, 2019·The New Phytologist·Martin M Vila-AiubStephen B Powles
Feb 7, 2020·Pest Management Science·Renata P Pincelli-SouzaMarcelo de A Silva
Aug 7, 2019·Journal of Experimental Botany·Miriam Gil-MonrealMercedes Royuela
Nov 24, 2019·The Science of the Total Environment·Anne-Antonella SerraGwenola Gouesbet
Jan 26, 2021·Plant Science : an International Journal of Experimental Plant Biology·Paola GanugiMarco Trevisan
Sep 16, 2017·Pesticide Biochemistry and Physiology·Ana ZabalzaMercedes Royuela

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