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GABA shunt pathway is stimulated in response to early defoliation-induced carbohydrate limitation in Mandarin fruits

hal.structure.identifierChimie et Biomasse, UMR-CNRS 6134
dc.contributor.authorLOURKISTI, Radia
hal.structure.identifierChimie et Biomasse, UMR-CNRS 6134
hal.structure.identifierAmélioration génétique et adaptation des plantes méditerranéennes et tropicales [UMR AGAP]
dc.contributor.authorANTOINE, Sandrine
hal.structure.identifierUnité Expérimentale Citrus [Citrus]
dc.contributor.authorPAILLY, Olivier
hal.structure.identifierAmélioration Génétique et Adaptation des Plantes méditerranéennes et Tropicales Corse - Antenne Corse [AGAP-Corse]
dc.contributor.authorLURO, François
hal.structure.identifierBiologie du fruit et pathologie [BFP]
hal.structure.identifierPlateforme Bordeaux Metabolome
hal.structure.identifierMetaboHUB-Bordeaux
dc.contributor.authorGIBON, Yves
hal.structure.identifierChimie et Biomasse, UMR-CNRS 6134
dc.contributor.authorOUSTRIC, Julie
hal.structure.identifierChimie et Biomasse, UMR-CNRS 6134
dc.contributor.authorSANTINI, Jérémie
hal.structure.identifierChimie et Biomasse, UMR-CNRS 6134
dc.contributor.authorBERTI, Liliane
dc.date.issued2023-04
dc.identifier.issn2405-8440
dc.description.abstractEnThe regulation of sugar and organic acid metabolism during fruit development has a major effect on high-quality fruit production. The reduction of leaf area is a common feature in plant growth, induced by abiotic and biotic stresses and disturbing source/sink ratio, thus impacting fruit quality. Here, we induced carbohydrate limitation by partial leaf defoliation at the beginning of the second stage of mandarin development (before the citrate peak). Resulting changes were monitored in the short-term (48 h and 1 week) and long-term (7 weeks) after the defoliation. Short-term response to early defoliation implied metabolic settings to re-feed TCA for sustaining respiration rate. These features involved (i) vacuolar sucrose degradation (high acid invertase activity and mRNA expression level) and enhanced glycolytic flux (high ATP-phosphofructokinase activity), (ii) malic and citric acid utilization (increased phosphoenolpyr-uvate kinase and NADP-Isocitrate dehydrogenase) associated with vacuolar citric acid release (high mRNA expression of the transporter CsCit1) and (iii) stimulation of GABA shunt pathway (low GABA content and increased mRNA expression of succinate semialdehyde dehydrogenase). A steady-state proline level was found in ED fruits although an increase in P5CS mRNA expression level. These results contribute to a better knowledge of the molecular basis of the relationship between defoliation and sugar and organic acid metabolism in mandarin fruit.
dc.language.isoen
dc.publisherElsevier
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/
dc.subject.enLeaf removal
dc.subject.enCitrus fruits
dc.subject.enGABA shunt
dc.subject.enCitric acid
dc.subject.enCarbohydrate limitation
dc.subject.enSourcesink ratio
dc.subject.enLeaf removal Citrus fruits GABA shunt Citric acid Carbohydrate limitation Source/sink ratio
dc.title.enGABA shunt pathway is stimulated in response to early defoliation-induced carbohydrate limitation in Mandarin fruits
dc.typeArticle de revue
dc.identifier.doi10.1016/j.heliyon.2023.e15573
dc.subject.halSciences du Vivant [q-bio]/Alimentation et Nutrition
bordeaux.journalHeliyon
bordeaux.pagee15573
bordeaux.volume9
bordeaux.issue4
bordeaux.peerReviewedoui
hal.identifierhal-04176065
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-04176065v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Heliyon&rft.date=2023-04&rft.volume=9&rft.issue=4&rft.spage=e15573&rft.epage=e15573&rft.eissn=2405-8440&rft.issn=2405-8440&rft.au=LOURKISTI,%20Radia&ANTOINE,%20Sandrine&PAILLY,%20Olivier&LURO,%20Fran%C3%A7ois&GIBON,%20Yves&rft.genre=article


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