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Mechanism of Resistance of Evolved Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri)

Evolved glyphosate resistance in weedy species represents a challenge for the continued success and utility of glyphosate-resistant crops. Glyphosate functions by inhibiting the plant enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS). The resistance mechanism was determined in a population...

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Published in:Journal of agricultural and food chemistry 2011-06, Vol.59 (11), p.5886-5889
Main Authors: Gaines, Todd A, Shaner, Dale L, Ward, Sarah M, Leach, Jan E, Preston, Christopher, Westra, Philip
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Language:English
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cited_by cdi_FETCH-LOGICAL-a344t-f3d589d0246473b9d7766fb90747d5e45071329282d5c23ea08a07a0ffcb02493
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container_issue 11
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container_title Journal of agricultural and food chemistry
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creator Gaines, Todd A
Shaner, Dale L
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Leach, Jan E
Preston, Christopher
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description Evolved glyphosate resistance in weedy species represents a challenge for the continued success and utility of glyphosate-resistant crops. Glyphosate functions by inhibiting the plant enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS). The resistance mechanism was determined in a population of glyphosate-resistant Palmer amaranth from Georgia (U.S.). Within this population, glyphosate resistance correlates with increases in (a) genomic copy number of EPSPS, (b) expression of the EPSPS transcript, (c) EPSPS protein level, and (d) EPSPS enzymatic activity. Dose response results from the resistant and an F2 population suggest that between 30 and 50 EPSPS genomic copies are necessary to survive glyphosate rates between 0.5 and 1.0 kg ha−1. These results further confirm the role of EPSPS gene amplification in conferring glyphosate resistance in this population of Palmer amaranth. Questions remain related to how the EPSPS amplification initially occurred and the occurrence of this mechanism in other Palmer amaranth populations and other glyphosate-resistant species.
doi_str_mv 10.1021/jf104719k
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Glyphosate functions by inhibiting the plant enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS). The resistance mechanism was determined in a population of glyphosate-resistant Palmer amaranth from Georgia (U.S.). Within this population, glyphosate resistance correlates with increases in (a) genomic copy number of EPSPS, (b) expression of the EPSPS transcript, (c) EPSPS protein level, and (d) EPSPS enzymatic activity. Dose response results from the resistant and an F2 population suggest that between 30 and 50 EPSPS genomic copies are necessary to survive glyphosate rates between 0.5 and 1.0 kg ha−1. These results further confirm the role of EPSPS gene amplification in conferring glyphosate resistance in this population of Palmer amaranth. 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Psychology ; Gene Dosage ; Gene Expression Regulation, Plant - drug effects ; Glycine - analogs &amp; derivatives ; Glycine - pharmacology ; Glyphosate ; Herbicide Resistance ; Herbicides - pharmacology ; Plant Proteins - antagonists &amp; inhibitors ; Plant Proteins - genetics ; Plant Proteins - metabolism ; Plant Weeds - drug effects</subject><ispartof>Journal of agricultural and food chemistry, 2011-06, Vol.59 (11), p.5886-5889</ispartof><rights>Copyright © 2011 American Chemical Society</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a344t-f3d589d0246473b9d7766fb90747d5e45071329282d5c23ea08a07a0ffcb02493</citedby><cites>FETCH-LOGICAL-a344t-f3d589d0246473b9d7766fb90747d5e45071329282d5c23ea08a07a0ffcb02493</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>309,310,314,780,784,789,790,23930,23931,25140,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&amp;idt=24211857$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/21329355$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Gaines, Todd A</creatorcontrib><creatorcontrib>Shaner, Dale L</creatorcontrib><creatorcontrib>Ward, Sarah M</creatorcontrib><creatorcontrib>Leach, Jan E</creatorcontrib><creatorcontrib>Preston, Christopher</creatorcontrib><creatorcontrib>Westra, Philip</creatorcontrib><title>Mechanism of Resistance of Evolved Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri)</title><title>Journal of agricultural and food chemistry</title><addtitle>J. Agric. Food Chem</addtitle><description>Evolved glyphosate resistance in weedy species represents a challenge for the continued success and utility of glyphosate-resistant crops. Glyphosate functions by inhibiting the plant enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS). The resistance mechanism was determined in a population of glyphosate-resistant Palmer amaranth from Georgia (U.S.). Within this population, glyphosate resistance correlates with increases in (a) genomic copy number of EPSPS, (b) expression of the EPSPS transcript, (c) EPSPS protein level, and (d) EPSPS enzymatic activity. Dose response results from the resistant and an F2 population suggest that between 30 and 50 EPSPS genomic copies are necessary to survive glyphosate rates between 0.5 and 1.0 kg ha−1. These results further confirm the role of EPSPS gene amplification in conferring glyphosate resistance in this population of Palmer amaranth. 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Psychology</subject><subject>Gene Dosage</subject><subject>Gene Expression Regulation, Plant - drug effects</subject><subject>Glycine - analogs &amp; derivatives</subject><subject>Glycine - pharmacology</subject><subject>Glyphosate</subject><subject>Herbicide Resistance</subject><subject>Herbicides - pharmacology</subject><subject>Plant Proteins - antagonists &amp; inhibitors</subject><subject>Plant Proteins - genetics</subject><subject>Plant Proteins - metabolism</subject><subject>Plant Weeds - drug effects</subject><issn>0021-8561</issn><issn>1520-5118</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNptkMtKw0AUhgdRbK0ufAGZjWAX0TO3TLIspVZBUUR3QpjMhaYmTcikhb69U3vbuDrn8H_n9iN0TeCeACUPc0eAS5L-nKA-ERQiQUhyivoQxCgRMemhC-_nAJAICeeoRwmjKROij75frZ6pReErXDv8YX3hO7XQdlNNVnW5sgZPy3Uzq73qbLQHOvyuysq2eFSpNpQzfLfPlh43f1oxvERnTpXeXu3iAH09Tj7HT9HL2_R5PHqJFOO8ixwzIkkNUB5zyfLUSBnHLk9BcmmE5QLk5l6aUCM0ZVZBokAqcE7noSllAzTcztVt7X1rXda0RThnnRHINg5lB4cCe7Nlm2VeWXMg95YE4HYHKK9V6cJTuvBHjtNgrpBHTmmfzetluwgv_rPwF6gseR4</recordid><startdate>20110608</startdate><enddate>20110608</enddate><creator>Gaines, Todd A</creator><creator>Shaner, Dale L</creator><creator>Ward, Sarah M</creator><creator>Leach, Jan E</creator><creator>Preston, Christopher</creator><creator>Westra, Philip</creator><general>American Chemical Society</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20110608</creationdate><title>Mechanism of Resistance of Evolved Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri)</title><author>Gaines, Todd A ; Shaner, Dale L ; Ward, Sarah M ; Leach, Jan E ; Preston, Christopher ; Westra, Philip</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a344t-f3d589d0246473b9d7766fb90747d5e45071329282d5c23ea08a07a0ffcb02493</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>3-Phosphoshikimate 1-Carboxyvinyltransferase - antagonists &amp; inhibitors</topic><topic>3-Phosphoshikimate 1-Carboxyvinyltransferase - genetics</topic><topic>3-Phosphoshikimate 1-Carboxyvinyltransferase - metabolism</topic><topic>Amaranthus - drug effects</topic><topic>Amaranthus - enzymology</topic><topic>Amaranthus - genetics</topic><topic>Biological and medical sciences</topic><topic>Cereal and baking product industries</topic><topic>Enzyme Inhibitors - pharmacology</topic><topic>Food industries</topic><topic>Fundamental and applied biological sciences. 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source American Chemical Society:Jisc Collections:American Chemical Society Read & Publish Agreement 2022-2024 (Reading list)
subjects 3-Phosphoshikimate 1-Carboxyvinyltransferase - antagonists & inhibitors
3-Phosphoshikimate 1-Carboxyvinyltransferase - genetics
3-Phosphoshikimate 1-Carboxyvinyltransferase - metabolism
Amaranthus - drug effects
Amaranthus - enzymology
Amaranthus - genetics
Biological and medical sciences
Cereal and baking product industries
Enzyme Inhibitors - pharmacology
Food industries
Fundamental and applied biological sciences. Psychology
Gene Dosage
Gene Expression Regulation, Plant - drug effects
Glycine - analogs & derivatives
Glycine - pharmacology
Glyphosate
Herbicide Resistance
Herbicides - pharmacology
Plant Proteins - antagonists & inhibitors
Plant Proteins - genetics
Plant Proteins - metabolism
Plant Weeds - drug effects
title Mechanism of Resistance of Evolved Glyphosate-Resistant Palmer Amaranth (Amaranthus palmeri)
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