Potato (Solanum tuberosum L.) tuber ageing induces changes in the proteome and antioxidants associated with the sprouting pattern
Identifieur interne : 001083 ( Main/Exploration ); précédent : 001082; suivant : 001084Potato (Solanum tuberosum L.) tuber ageing induces changes in the proteome and antioxidants associated with the sprouting pattern
Auteurs : Pierre Delaplace [Belgique] ; Marie-Laure Fauconnier [Belgique] ; Kjell Sergeant [Luxembourg (pays)] ; Jean-Franois Dierick [Belgique] ; Mouhssin Oufir [Luxembourg (pays)] ; Froukje Van Der Wal [Pays-Bas] ; Antoine H. P. America [Pays-Bas] ; Jenny Renaut [Luxembourg (pays)] ; Jean-Franois Hausman [Luxembourg (pays)] ; Patrick Du Jardin [Belgique]Source :
- Journal of Experimental Botany [ 0022-0957 ] ; 2009-02-09.
Abstract
During post-harvest storage, potato tubers age as they undergo an evolution of their physiological state influencing their sprouting pattern. In the present study, physiological and biochemical approaches were combined to provide new insights on potato (Solanum tuberosum L. cv. Dsire) tuber ageing. An increase in the physiological age index (PAI) value from 0.14 to 0.83 occurred during storage at 4C over 270d. Using this reference frame, a proteomic approach was followed based on two-dimensional electrophoresis. In the experimental conditions of this study, a marked proteolysis of patatin occurred after the PAI reached a value of 0.6. In parallel, several glycolytic enzymes were up-regulated and cellular components influencing protein conformation and the response to stress were altered. The equilibrium between the 20S and 26S forms of the proteasome was modified, the 20S form that recycles oxidized proteins being up-regulated. Two proteins belonging to the cytoskeleton were also differentially expressed during ageing. As most of these changes are also observed in an oxidative stress context, an approach focused on antioxidant compounds and enzymes as well as oxidative damage on polyunsaturated fatty acids and proteins was conducted. All the changes observed during ageing seemed to allow the potato tubers to maintain their radical scavenging activity until the end of the storage period as no accumulation of oxidative damage was observed. These data are interpreted considering the impact of reactive oxygen species on the development and the behaviour of other plant systems undergoing ageing or senescence processes.
Url:
DOI: 10.1093/jxb/erp008
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In the present study, physiological and biochemical approaches were combined to provide new insights on potato (Solanum tuberosum L. cv. Dsire) tuber ageing. An increase in the physiological age index (PAI) value from 0.14 to 0.83 occurred during storage at 4C over 270d. Using this reference frame, a proteomic approach was followed based on two-dimensional electrophoresis. In the experimental conditions of this study, a marked proteolysis of patatin occurred after the PAI reached a value of 0.6. In parallel, several glycolytic enzymes were up-regulated and cellular components influencing protein conformation and the response to stress were altered. The equilibrium between the 20S and 26S forms of the proteasome was modified, the 20S form that recycles oxidized proteins being up-regulated. Two proteins belonging to the cytoskeleton were also differentially expressed during ageing. As most of these changes are also observed in an oxidative stress context, an approach focused on antioxidant compounds and enzymes as well as oxidative damage on polyunsaturated fatty acids and proteins was conducted. All the changes observed during ageing seemed to allow the potato tubers to maintain their radical scavenging activity until the end of the storage period as no accumulation of oxidative damage was observed. These data are interpreted considering the impact of reactive oxygen species on the development and the behaviour of other plant systems undergoing ageing or senescence processes.</div></front></TEI><affiliations><list><country><li>Belgique</li><li>Luxembourg (pays)</li><li>Pays-Bas</li></country></list><tree><country name="Belgique"><noRegion><name sortKey="Delaplace, Pierre" sort="Delaplace, Pierre" uniqKey="Delaplace P" first="Pierre" last="Delaplace">Pierre Delaplace</name></noRegion><name sortKey="Delaplace, Pierre" sort="Delaplace, Pierre" uniqKey="Delaplace P" first="Pierre" last="Delaplace">Pierre Delaplace</name><name sortKey="Dierick, Jean Franois" sort="Dierick, Jean Franois" uniqKey="Dierick J" first="Jean-Franois" last="Dierick">Jean-Franois Dierick</name><name sortKey="Du Jardin, Patrick" sort="Du Jardin, Patrick" uniqKey="Du Jardin P" first="Patrick" last="Du Jardin">Patrick Du Jardin</name><name sortKey="Fauconnier, Marie Laure" sort="Fauconnier, Marie Laure" uniqKey="Fauconnier M" first="Marie-Laure" last="Fauconnier">Marie-Laure Fauconnier</name></country><country name="Luxembourg (pays)"><noRegion><name sortKey="Sergeant, Kjell" sort="Sergeant, Kjell" uniqKey="Sergeant K" first="Kjell" last="Sergeant">Kjell Sergeant</name></noRegion><name sortKey="Hausman, Jean Franois" sort="Hausman, Jean Franois" uniqKey="Hausman J" first="Jean-Franois" last="Hausman">Jean-Franois Hausman</name><name sortKey="Oufir, Mouhssin" sort="Oufir, Mouhssin" uniqKey="Oufir M" first="Mouhssin" last="Oufir">Mouhssin Oufir</name><name sortKey="Renaut, Jenny" sort="Renaut, Jenny" uniqKey="Renaut J" first="Jenny" last="Renaut">Jenny Renaut</name></country><country name="Pays-Bas"><noRegion><name sortKey="Van Der Wal, Froukje" sort="Van Der Wal, Froukje" uniqKey="Van Der Wal F" first="Froukje" last="Van Der Wal">Froukje Van Der Wal</name></noRegion><name sortKey="America, Antoine H P" sort="America, Antoine H P" uniqKey="America A" first="Antoine H. P." last="America">Antoine H. P. America</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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