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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erz351
|2 doi
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|a pubmed25n1003.xml
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|e rakwb
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|a eng
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|a Launay, Alban
|e verfasserin
|4 aut
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|a Proline oxidation fuels mitochondrial respiration during dark-induced leaf senescence in Arabidopsis thaliana
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|c 2019
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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 10.08.2020
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|a Date Revised 10.08.2020
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author(s) 2019. Published by Oxford University Press on behalf of the Society for Experimental Biology.
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|a Leaf senescence is a form of developmentally programmed cell death that allows the remobilization of nutrients and cellular materials from leaves to sink tissues and organs. Among the catabolic reactions that occur upon senescence, little is known about the role of proline catabolism. In this study, the involvement in dark-induced senescence of proline dehydrogenases (ProDHs), which catalyse the first and rate-limiting step of proline oxidation in mitochondria, was investigated using prodh single- and double-mutants with the help of biochemical, proteomic, and metabolomic approaches. The presence of ProDH2 in mitochondria was confirmed by mass spectrometry and immunogold labelling in dark-induced leaves of Arabidopsis. The prodh1 prodh2 mutant exhibited enhanced levels of most tricarboxylic acid cycle intermediates and free amino acids, demonstrating a role of ProDH in mitochondrial metabolism. We also found evidence of the involvement and the importance of ProDH in respiration, with proline as an alternative substrate, and in remobilization of proline during senescence to generate glutamate and energy that can then be exported to sink tissues and organs
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Arabidopsis thaliana
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|a dark-induced leaf senescence
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|a mitochondria
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|a primary metabolism
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|a proline dehydrogenase
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|a proline metabolism
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|a Arabidopsis Proteins
|2 NLM
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|a Chlorophyll
|2 NLM
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|a 1406-65-1
|2 NLM
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|a Proline
|2 NLM
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|a 9DLQ4CIU6V
|2 NLM
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|a Cabassa-Hourton, Cécile
|e verfasserin
|4 aut
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|a Eubel, Holger
|e verfasserin
|4 aut
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|a Maldiney, Régis
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|a Guivarc'h, Anne
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|a Crilat, Emilie
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|a Planchais, Séverine
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|a Lacoste, Jérôme
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|a Bordenave-Jacquemin, Marianne
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|a Clément, Gilles
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|a Richard, Luc
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|a Carol, Pierre
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|a Braun, Hans-Peter
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|a Lebreton, Sandrine
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|a Savouré, Arnould
|e verfasserin
|4 aut
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 70(2019), 21 vom: 18. Nov., Seite 6203-6214
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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|g volume:70
|g year:2019
|g number:21
|g day:18
|g month:11
|g pages:6203-6214
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|u http://dx.doi.org/10.1093/jxb/erz351
|3 Volltext
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