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IVES 9 IVES Conference Series 9 Understanding the expression of gene families involved in anthocyanin biosynthesis during berry ripening: Tannat as a case study

Understanding the expression of gene families involved in anthocyanin biosynthesis during berry ripening: Tannat as a case study

Abstract

The quality of wine is assessed, among other things, by its color, which is mainly due to its anthocyanin content. These pigments are polyphenols that give red, purple and blue hues depending on the relative proportion of anthocyanins produced by the action of flavonoid 3’5′ hydroxylase (delphinidin-3-glucoside, petunidin-3-glucoside, malvidin-3-glucoside) or flavonoid 3′ hydroxylase (cyanidin-3-glucoside, peonidin-3-glucoside). To study the genes involved in this biosynthetic pathway, we focused on Vitis vinifera cv. Tannat, known for producing wines with higher anthocyanin content and darker purple color compared to most red grape varieties. In this work, we have performed RNA-Seq analysis of skins during berry development, taking green and red berries at 50% veraison as separate samples, as an experimental strategy to focus on the differential expression of genes of interest. Several novel (not previously annotated in the Pinot noir reference genome PN40024 12X) and varietal (not in the reference genome) genes showed differential expression associated with color change during veraison. Expression of a novel F3’5’H gene and a varietal F3’H gene was confirmed by RT-qPCR in the same samples used for RNA-Seq and in another growing season. This work establishes the specific expression fingerprint for gene families (CHS, CHI, F3H, F3’H, F3’5’H, DFR, LDOX, 3GT, OMT, MYBA1, MYBA2, MYBA3) directly involved in anthocyanin biosynthesis and regulation during Tannat veraison.

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Cecilia C. Da Silva1*, Eduardo Boido2, Carina Gaggero3, Massimo Delledonne4, Francisco Carrau2

1 PDU Espacio de Biología Vegetal del Noreste, sede Tacuarembó, CENUR Noreste, Universidad de la República, Tacuarembó, Uruguay
2 Área Enología y Biotecnología de Fermentaciones, Facultad de Química, Universidad de la República, Montevideo, Uruguay
3 Departamento de Biología Molecular, Instituto de Investigaciones Biológicas Clemente Estable, Montevideo, Uruguay
4 Centro di Genomica Funzionale, Dipartimento di Biotecnologie, Universitá degli Studi di Verona, Verona, Italy

Contact the author*

Keywords

Anthocyanins, Vitis vinifera, Tannat, RNA-Seq.

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

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