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231224s2013 xx |||||o 00| ||eng c |
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|a 10.1016/j.jplph.2013.01.003
|2 doi
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|a pubmed25n0749.xml
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|a (DE-627)NLM224883836
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|a (NLM)23394788
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|a (PII)S0176-1617(13)00027-8
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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1 |
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|a Zabalza, Ana
|e verfasserin
|4 aut
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|a Branched-chain amino acid biosynthesis inhibitors
|b herbicide efficacy is associated with an induced carbon-nitrogen imbalance
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|c 2013
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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
|b cr
|2 rdacarrier
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|a Date Completed 07.11.2013
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|a Date Revised 09.01.2024
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Copyright © 2013 Elsevier GmbH. All rights reserved.
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|a Acetolactate synthase (ALS; EC 4.1.3.18) and ketol-acid reductoisomerase (KARI; EC 1.1.1.86) are two consecutive enzymes in the biosynthesis of branched-chain amino acids. Several commercial herbicides inhibit ALS as their primary site of action. KARI has also attracted attention as a potential target for herbicides. Although potent and selective inhibitors of KARI have been discovered, these inhibitors display less herbicidal activity than ALS-inhibiting herbicides. To obtain a better understanding of these findings, we have compared the physiological effects induced in pea plants after KARI or ALS inhibition. Although, both types of inhibitors induce growth arrest and photosynthesis inhibition, plant death occurs more rapidly under ALS inhibition than KARI inhibition. Carbohydrates accumulated in the leaves and roots following treatments with both inhibitors. The carbohydrate accumulation in the leaves occurred as a consequence of a decrease in sink strength. In contrast, the free amino acid content was only affected through ALS inhibition. These results indicate that although KARI and ALS inhibition block the same biosynthetic pathway and exert common effects on carbon metabolism, nitrogen metabolism is more affected via ALS than KARI inhibition. Thus, metabolic alterations in nitrogen metabolism induced through ALS inhibitors might contribute to the increased efficacy of these chemicals as herbicides
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Amino Acids, Branched-Chain
|2 NLM
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|a Herbicides
|2 NLM
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|a Lactates
|2 NLM
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|a Quinic Acid
|2 NLM
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|a 058C04BGYI
|2 NLM
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|a N-cyclopropyl adenosine-5'-carboxamide
|2 NLM
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|a 50908-62-8
|2 NLM
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| 650 |
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|a alpha-acetolactate
|2 NLM
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| 650 |
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|a 535-17-1
|2 NLM
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| 650 |
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|a Carbon
|2 NLM
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|a 7440-44-0
|2 NLM
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|a Ketol-Acid Reductoisomerase
|2 NLM
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| 650 |
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|a EC 1.1.1.86
|2 NLM
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| 650 |
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|a Acetolactate Synthase
|2 NLM
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| 650 |
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|a EC 2.2.1.6
|2 NLM
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| 650 |
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|a Adenosine
|2 NLM
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| 650 |
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|a K72T3FS567
|2 NLM
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| 650 |
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|a Nitrogen
|2 NLM
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| 650 |
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|a N762921K75
|2 NLM
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| 700 |
1 |
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|a Zulet, Amaia
|e verfasserin
|4 aut
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1 |
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|a Gil-Monreal, Miriam
|e verfasserin
|4 aut
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| 700 |
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|a Igal, Maria
|e verfasserin
|4 aut
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| 700 |
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|a Royuela, Mercedes
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of plant physiology
|d 1979
|g 170(2013), 9 vom: 15. Juni, Seite 814-21
|w (DE-627)NLM098174622
|x 1618-1328
|7 nnns
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| 773 |
1 |
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|g volume:170
|g year:2013
|g number:9
|g day:15
|g month:06
|g pages:814-21
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| 856 |
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|u http://dx.doi.org/10.1016/j.jplph.2013.01.003
|3 Volltext
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|d 170
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|h 814-21
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