Utilize este identificador para referenciar este registo: http://hdl.handle.net/10348/8647
Título: Spontaneous variation regarding grape berry skin color: A comprehensive study of berry development by means of biochemical and molecular markers
Autor: Ferreira, Vanessa
Fernandes, Fátima
Carrasco, David
Hernandez, Marivel Gonzalez
Pinto-Carnide, Olinda
Arroyo-García, Rosa
Andrade, Paula
Valentão, Patrícia
Falco, Virgílio
Castro, Isaura Alberta Oliveira De
Palavras-chave: Vitis vinifera L.
Somatic variants
Skin color
CIElab
Phenolic profiles
VvMybA1–2
Data: 2017
Resumo: Understanding grape berry development and the metabolism of different classes of compounds responsible for traits like berry's color is imperative to control and improve quality aspects of grapes. A colorimetric, biochemical and molecular characterization allowed the comprehensive description of the pigment-related characteristics of nine berry skin color somatic variants, belonging to four different varieties. Although the observed berry skin color variability was not fully explained by MybA locus, the phenolic profiles allowed inferring about specific interferences among the biosynthetic pathways. Data were consistent concerning that grapes showing cyanidin-3-O-glucoside as the major anthocyanin and flavonols with two substituent groups in the lateral B-ring are generally originated by a white ancestor. After retro-mutation, these grapes seem to keep the dysfunction on flavonoid hydroxylases enzymes, which negatively affect the synthesis of both flavonols and anthocyanins with three substituent groups in the lateral B-ring. Overall, the obtained results indicate that the color differences observed between somatic variants are not solely the result of the total amount of compounds synthesized, but rather reflect a different dynamics of the phenolic pathway among the different color variants of the same variety.
Revisão por Pares: yes
URI: http://hdl.handle.net/10348/8647
ISSN: 0963-9969
Tipo de Documento: Artigo
Aparece nas colecções:DGB - Artigo publicado em Revista Científica Indexada



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