Abscisic Acid and Chitosan Modulate Polyphenol Metabolism and Berry Qualities in the Domestic White-Colored Cultivar Savvatiano ine cv. ‘Touriga Nacional’ performance, ripening and berry metabolomics profile

  • Pharmacie,
  • Santé-Sciences-Technologie,

du 22 juin 2022 au 22 juin 2025


Site Grandmont

EA2106 BBV - Biomolécules et Biotechnologies végétales

Read our collaborative article with Pr Kosteridis from University of Athens (Greece). Biostimulants have emerged as innovative technical solutions to synthetic chemicals, providing sustainable alternative for grapevine protection. We evaluated the impact on a polyphenol metabolism in a local Greek cultivar.

Miliordos DE, Alatzas A, Kontoudakis N, Kouki A, Unlubayir M, Gémin MP, Tako A, Hatzopoulos P, Lanoue A, Kotseridis Y. Abscisic Acid and Chitosan Modulate Polyphenol Metabolism and Berry Qualities in the Domestic White-Colored Cultivar Savvatiano. Plants (Basel). 2022;11(13):1648. doi: 10.3390/plants11131648.


During the last decade, several studies demonstrated the effect of biostimulants on the transcriptional and metabolic profile of grape berries, suggesting their application as a useful viticultural practice to improve grape and wine quality. Herein, we investigated the impact of two biostimulants-abscisic acid (0.04% w/v and 0.08% w/v) and chitosan (0.3% w/v and 0.6% w/v)-on the polyphenol metabolism of the Greek grapevine cultivar, Savvatiano, in order to determine the impact of biostimulants' application in the concentration of phenolic compounds. The applications were performed at the veraison stage and the impact on yield, berry quality traits, metabolome and gene expression was examined at three phenological stages (veraison, middle veraison and harvest) during the 2019 and 2020 vintages. Results showed that anthocyanins increased during veraison after treatment with chitosan and abscisic acid. Additionally, stilbenoids were recorded in higher amount following the chitosan and abscisic acid treatments at harvest. Both of the abscisic acid and chitosan applications induced the expression of genes involved in stilbenoids and anthocyanin biosynthesis and resulted in increased accumulation, regardless of the vintage. Alterations in other phenylpropanoid gene expression profiles and phenolic compound concentrations were observed as well. Nevertheless, they were mostly restricted to the first vintage. Therefore, the application of abscisic acid and chitosan on the Greek cultivar Savvatiano showed promising results to induce stilbenoid metabolism and potentially increase grape defense and quality traits.

Keywords: Savvatiano; Vitis vinifera L.; abscisic acid; biostimulants; chitosan; gene expression; phenylpropanoid biosynthesis; polyphenolic profile.