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A difference gel electrophoresis study on thylakoids isolated from poplar leaves reveals a negative impact of ozone exposure on membrane proteins

Abstract : Populus tremula L. x P. alba L. (Populus x canescens (Aiton) Smith), clone INRA 717-1-B4, saplings were subjected to 120 ppb ozone exposure for 28 days. Chloroplasts were isolated, and the membrane proteins, solubilized using the detergent 1,2-diheptanoyl-sn-glycero-3-phosphocholine (DHPC), were analyzed in a difference gel electrophoresis (DiGE) experiment comparing control versus ozone-exposed plants. Extrinsic photosystem (PS) proteins and adenosine triphosphatase (ATPase) subunits were detected to vary in abundance. The general trend was a decrease in abundance, except for ferredoxin–NADP+ oxidoreductase (FNR), which increased after the first 7 days of exposure. The up-regulation of FNR would increase NAPDH production for reducing power and detoxification inside and outside of the chloroplast. Later on, FNR and a number of PS and ATPase subunits decrease in abundance. This could be the result of oxidative processes on chloroplast proteins but could also be a way to down-regulate photochemical reactions in response to an inhibition in Calvin cycle activity.
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https://hal.inrae.fr/hal-02649225
Contributor : Migration Prodinra <>
Submitted on : Friday, May 29, 2020 - 11:35:12 AM
Last modification on : Tuesday, November 10, 2020 - 4:08:20 PM

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Sacha Bohler, Kjell Sergeant, Lucien Hoffmann, Pierre Dizengremel, Jean-François Hausman, et al.. A difference gel electrophoresis study on thylakoids isolated from poplar leaves reveals a negative impact of ozone exposure on membrane proteins. Journal of Proteome Research, American Chemical Society, 2011, 10 (7), pp.3003-3011. ⟨10.1021/pr1012009⟩. ⟨hal-02649225⟩

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