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Solar UV light regulates flavonoid metabolism in apple (Malus x domestica).
Henry-Kirk, Rebecca A; Plunkett, Blue; Hall, Miriam; McGhie, Tony; Allan, Andrew C; Wargent, Jason J; Espley, Richard V.
Afiliación
  • Henry-Kirk RA; The New Zealand Institute for Plant and Food Research Limited (PFR), Private Bag, 92169, Auckland, New Zealand.
  • Plunkett B; The New Zealand Institute for Plant and Food Research Limited (PFR), Private Bag, 92169, Auckland, New Zealand.
  • Hall M; The New Zealand Institute for Plant and Food Research Limited (PFR), Private Bag, 92169, Auckland, New Zealand.
  • McGhie T; Plant and Food Research, Palmerston North Research Centre, Palmerston North, 4442, New Zealand.
  • Allan AC; The New Zealand Institute for Plant and Food Research Limited (PFR), Private Bag, 92169, Auckland, New Zealand.
  • Wargent JJ; School of Biological Sciences, University of Auckland, Private Bag, 92019, Auckland, New Zealand.
  • Espley RV; Institute of Agriculture and Environment, Massey University, Private Bag 11222, Palmerston North, 4442, New Zealand.
Plant Cell Environ ; 41(3): 675-688, 2018 03.
Article en En | MEDLINE | ID: mdl-29315644
Ultraviolet-B light (UV-B) is one environmental signal perceived by plants that affects the flavonoid pathway and influences the levels of anthocyanins, flavonols, and proanthocyanidins. To understand the mechanisms underlying UV exposure, apple trees were grown under spectral filters that altered transmission of solar UV light. Fruit analysis showed that UV induced changes in physiology, metabolism, and gene expression levels during development over a season. These changes were sustained after storage. Under low UV, ripening was delayed, fruit size decreased, and anthocyanin and flavonols were reduced. Expression analysis showed changes in response to UV light levels for genes in the regulation and biosynthesis of anthocyanin and flavonols. Transcription of flavonol synthase (FLS), ELONGATED HYPOCOTYL 5 (HY5), MYB10, and MYB22 were down-regulated throughout fruit development under reduced UV. Functional testing showed that the FLS promoter was activated by HY5, and this response was enhanced by the presence of MYB22. The MYB22 promoter can also be activated by the anthocyanin regulator, MYB10. As ambient levels of UV light vary around the globe, this study has implications for future crop production, the quality of which can be determined by the response to UV.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas de Plantas / Flavonoides / Malus / Frutas Idioma: En Revista: Plant Cell Environ Asunto de la revista: BOTANICA Año: 2018 Tipo del documento: Article País de afiliación: Nueva Zelanda Pais de publicación: Estados Unidos
Texto completo
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Proteínas de Plantas / Flavonoides / Malus / Frutas Idioma: En Revista: Plant Cell Environ Asunto de la revista: BOTANICA Año: 2018 Tipo del documento: Article País de afiliación: Nueva Zelanda Pais de publicación: Estados Unidos