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Fruit-localized phytochromes regulate plastid biogenesis, starch synthesis and carotenoid metabolism in tomato

hal.structure.identifierUniversidade de São Paulo = University of São Paulo [USP]
dc.contributor.authorBIANCHETTI, Ricardo Ernesto
hal.structure.identifierUniversidade de São Paulo = University of São Paulo [USP]
dc.contributor.authorSILVESTRE LIRA, Bruno
hal.structure.identifierUniversidade de São Paulo = University of São Paulo [USP]
dc.contributor.authorSANTOS MONTEIRO, Scarlet
hal.structure.identifierUniversidade de São Paulo = University of São Paulo [USP]
dc.contributor.authorDEMARCO, Diego
hal.structure.identifierUniversidade de São Paulo = University of São Paulo [USP]
dc.contributor.authorPURGATTO, Eduardo
hal.structure.identifierBiologie du fruit et pathologie [BFP]
dc.contributor.authorROTHAN, Christophe
hal.structure.identifierUniversidade de São Paulo = University of São Paulo [USP]
dc.contributor.authorROSSI, Magdalena
hal.structure.identifierUniversidade de São Paulo = University of São Paulo [USP]
dc.contributor.authorFRESCHI, Luciano
dc.date.issued2018
dc.identifier.issn0022-0957
dc.description.abstractEnLight signaling has long been reported to influence fruit biology, though the regulatory impact of fruit-localized photoreceptors on fruit development and metabolism remains elusive. Studies performed in phytochrome(PHY)-deficient tomato (Solanum lycopersicum) mutants suggest that SlPHYA, SlPHYB2 and to a lesser extent SlPHYB1 influence fruit development and ripening. By employing fruit-specific RNAi-mediated silencing of SlPHY genes, we demonstrated that fruit-localized SlPHYA and SlPHYB2 play contrasting roles in regulating plastid biogenesis and maturation in tomato. Data revealed that fruit-localized SlPHYA, rather than SlPHYB1 or SlPHYB2, positively influence tomato plastid differentiation and division machinery via changes in both light and cytokinin signaling-related gene expression. Fruit-localized SlPHYA and SlPHYB2 were also shown to modulate sugar metabolism in early developing fruits via overlapping, yet distinct, mechanisms involving the coordinated transcriptional regulation of sink- and starch biosynthesis-related genes. Fruit-specific SlPHY silencing also drastically altered the transcriptional profile of genes encoding light repressor proteins and carotenoid biosynthesis regulators, leading to reduced carotenoid biosynthesis during fruit ripening. Therefore, besides providing conclusive evidence on the regulation of tomato quality by fruit-localized phytochromes, our data also demonstrate the existence of an intricate PHY-hormonal interplay during fruit development and ripening.
dc.language.isoen
dc.publisherOxford University Press (OUP)
dc.subjectauxin
dc.subject.encytokinin
dc.subject.encarotenoid
dc.subject.enfleshy fruits
dc.subject.enplastid division
dc.title.enFruit-localized phytochromes regulate plastid biogenesis, starch synthesis and carotenoid metabolism in tomato
dc.typeArticle de revue
dc.identifier.doi10.1093/jxb/ery145
dc.subject.halSciences du Vivant [q-bio]/Biologie végétale
bordeaux.journalJournal of Experimental Botany
bordeaux.page3573-3586
bordeaux.volume69
bordeaux.issue15
bordeaux.peerReviewedoui
hal.identifierhal-02621708
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-02621708v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Journal%20of%20Experimental%20Botany&rft.date=2018&rft.volume=69&rft.issue=15&rft.spage=3573-3586&rft.epage=3573-3586&rft.eissn=0022-0957&rft.issn=0022-0957&rft.au=BIANCHETTI,%20Ricardo%20Ernesto&SILVESTRE%20LIRA,%20Bruno&SANTOS%20MONTEIRO,%20Scarlet&DEMARCO,%20Diego&PURGATTO,%20Eduardo&rft.genre=article


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