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231224s2012 xx |||||o 00| ||eng c |
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|a 10.1016/j.jplph.2012.06.014
|2 doi
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|a (PII)S0176-1617(12)00294-5
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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|a González-Torralva, Fidel
|e verfasserin
|4 aut
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|a Two non-target mechanisms are involved in glyphosate-resistant horseweed (Conyza canadensis L. Cronq.) biotypes
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|c 2012
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 14.03.2013
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|a Date Revised 13.12.2023
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2012 Elsevier GmbH. All rights reserved.
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|a The physiological and biochemical bases for glyphosate resistance and susceptibility in horseweed (Conyza canadensis L. Cronq.) populations collected from Córdoba, Huelva, Málaga, Jaén and Seville in southern Spain were investigated. Screening 25 populations treated with glyphosate (238gacidequivalentha(-1)) at the rosette stage (BBCH 14-15) revealed reductions in fresh weight (fw) of 9-99%. The resistant biotype (R C004) was 6.1 times more resistant than the susceptible biotype (S). Shikimate accumulation in both biotypes increased until 72h after treatment (HAT), and then continued to increase (to 61.2%) in the S biotype, but decreased by 40% in the R (C004) biotype. Differential glyphosate spray retention and foliar uptake of applied (14)C-glyphosate between the R (C004) and S biotype had no effect on resistance to this herbicide. Quantitative and qualitative tests showed greater (14)C-glyphosate mobility in the S biotype than in the R (C004) biotype. Glyphosate was metabolized faster in the R (C004) biotype than in the S biotype. The herbicide disappeared completely from the R (C004) biotype by conversion into glyoxylate, sarcosine and aminomethylphosphonic acid within 96 HAT. On the other hand, 41.43nmolg(-1)fw of all glyphosate applied remained in the S biotype and glyoxylate was its only non-toxic metabolite. These results suggest that glyphosate resistance in horseweed is due to two different non-target mechanisms, namely: (a) impaired glyphosate translocation and (b) glyphosate metabolism to other compounds
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Carbon Isotopes
|2 NLM
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|a Carboxylic Acids
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|a Herbicides
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|a Isoxazoles
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|a Organophosphonates
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|a Tetrazoles
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|a 2-amino-3-(3-hydrox-5(2-methyl-2H-tetrazol-5-yl)isoxazol-4-yl)propionic acid
|2 NLM
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|a J090588E6X
|2 NLM
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|a Glycine
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|a TE7660XO1C
|2 NLM
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|a Sarcosine
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|a Z711V88R5F
|2 NLM
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|a Rojano-Delgado, Antonia M
|e verfasserin
|4 aut
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|a Luque de Castro, María D
|e verfasserin
|4 aut
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|a Mülleder, Norbert
|e verfasserin
|4 aut
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|a De Prado, Rafael
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of plant physiology
|d 1979
|g 169(2012), 17 vom: 15. Nov., Seite 1673-9
|w (DE-627)NLM098174622
|x 1618-1328
|7 nnns
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| 773 |
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|g volume:169
|g year:2012
|g number:17
|g day:15
|g month:11
|g pages:1673-9
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|u http://dx.doi.org/10.1016/j.jplph.2012.06.014
|3 Volltext
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