Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Exploring Seaweed and Glycine Betaine Biostimulants for Enhanced Phenolic Content, Antioxidant Properties and Gene Expression of Vitis vinifera cv. ‘Touriga Franca’ berries

Eliana Monteiro
ORCID logo ,
Gabriella De Lorenzis
ORCID logo ,
Valentina Ricciardi
,
Miguel Baltazar
ORCID logo ,
Sandra Pereira
,
Sofia Correia
,
Helena Ferreira
,
Fernando Alves
,
Isabel Cortez
,
Berta Gonçalves
ORCID logo ,
Isaura Castro
* ORCID logo
Version 1 : Received: 15 November 2023 / Approved: 16 November 2023 / Online: 16 November 2023 (02:56:29 CET)

How to cite: Monteiro, E.; De Lorenzis, G.; Ricciardi, V.; Baltazar, M.; Pereira, S.; Correia, S.; Ferreira, H.; Alves, F.; Cortez, I.; Gonçalves, B.; Castro, I. Exploring Seaweed and Glycine Betaine Biostimulants for Enhanced Phenolic Content, Antioxidant Properties and Gene Expression of Vitis vinifera cv. ‘Touriga Franca’ berries. Preprints 2023, 2023111040. https://doi.org/10.20944/preprints202311.1040.v1 Monteiro, E.; De Lorenzis, G.; Ricciardi, V.; Baltazar, M.; Pereira, S.; Correia, S.; Ferreira, H.; Alves, F.; Cortez, I.; Gonçalves, B.; Castro, I. Exploring Seaweed and Glycine Betaine Biostimulants for Enhanced Phenolic Content, Antioxidant Properties and Gene Expression of Vitis vinifera cv. ‘Touriga Franca’ berries. Preprints 2023, 2023111040. https://doi.org/10.20944/preprints202311.1040.v1

Abstract

Climate change will pose a challenge for the winemaking sector worldwide, bringing progressively drier and warmer conditions and increasing the frequency and intensity of weather extremes. The short-term adaptation strategy of applying biostimulants through foliar application serves as a crucial measure in mitigating the detrimental effects of environmental stresses on grapevine yield and berry quality. The aim of this study was to evaluate the effect of foliar application of a seaweed based biostimulant (A. nodosum – ANE) and glycine betaine (GB) on berry quality, bioactive compounds, antioxidant activity, and elucidated their action on the secondary metabolism. A trial was installed in a commercial vineyard (cv. ‘Touriga Franca’) in the Cima Corgo (Upper Corgo) sub-region of the Douro Demarcated Region. A total of four foliar sprayings were performed during the growing season: at flowering, pea size, bunch closer, and veraison. There was a positive effect of GB in the berry quality traits. Both ANE and GB increased the synthesis of anthocyanins and other phenolics in berries and influenced the expression of genes related to the synthesis and transport of anthocyanins (CHS, F3H, UFGT, MATE1 and GST). So, they have the potential to act as elicitors of secondary metabolism, leading to improved grape quality, but also sets the foundation for sustainable agricultural practices in the long run.

Keywords

A. nodosum ; anthocyanin biosynthesis; antioxidant activity; berry quality; glycine betaine; transporter genes

Subject

Biology and Life Sciences, Biochemistry and Molecular Biology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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