Terroir 2020 banner
IVES 9 IVES Conference Series 9 Effects of soil characteristics on manganese transfer from soil to vine and wine

Effects of soil characteristics on manganese transfer from soil to vine and wine

Abstract

Aim: In recent times the export of Beaujolais wines has been jeopardised due to a limit of manganese content (Mn) in wine implemented by China (2 mg/L), related to suspicions of potassium permanganate fraud. Nevertheless, soil Mn content may be high in some soil types in Beaujolais. The aim of this study was to improve knowledge of manganese transfer from soil to vine and wine because data on this subject is scarce.

Methods and Results: Recent pedologic mapping of Beaujolais vineyards has enabled a Mn monitoring network to be set up in order to study Mn transfer from soil to vine and wine. Three soil types were considered. Two of the soils can be very high in EDTA Mn: soils from clays with cherts (soil type 7) and former piedmont deposits with leached soils (soil type 8). The third soil, though low in Mn, is the most important and symbolic of Beaujolais: granitic soil. Fifteen plots of Gamay were monitored during 3 years (2015-2017). Besides soil analysis made from pedologic pits, Mn content of petiole, must and wine (red standard wine-making of 40 kg grapes) were determined, as well as grape yield and biomass (pruning weight). Results show that Mn in petioles is better correlated with Mn in wine than Mn in must. Mn content of wine is little in relation with EDTA Mn in soil. It increases when soil pH or cation exchange capacity decreases.

Conclusions: 

This study has shown that Mn concentration in wine can be naturally very high (maximum of 14.6 g/L in this study). Soils with low cation exchange capacity and/or low pH, i.e. soil types 1 and 8, resulted in higher Mn content in wine. Low cation exchange capacity does not allow a great Mn fixation on clay-humic complex and low pH soil solubilizes metal generally and Mn in particular, so it can be taken up by the vine. Mn petiole content is a very good indicator of Mn content in wine. Maceration in red wine-making is also an element to take into consideration.

Significance and Impact of the Study: Mn content in Beaujolais wine can be very high because of soil type, rather than fraud. It is important to highlight this for wine exportations. Mn content in wine can be reduced by correcting the soil pH.

Download the PDF

DOI:

Publication date: March 17, 2021

Issue: Terroir 2020

Type: Video

Authors

Jean-Yves Cahurel1, Pierre Martini1*, B. Chatelet2, I. Letessier3

1Institut Français de la Vigne et du Vin, 210 boulevard Vermorel, CS 60320, 69661 Villefranche-sur-Saône, France
2Sicarex Beaujolais, 210 boulevard Vermorel, CS 60320, 69661 Villefranche-sur-Saône Cedex, France
3Sigales, 453 route de Chamrousse, 38410 St Martin d’Uriage, France

Contact the author

Keywords

Manganese, terroir, soil, Beaujolais, vine, wine

Tags

IVES Conference Series | Terroir 2020

Citation

Related articles…

Mapping grapevine metabolites in response to pathogen challenge: a Mass Spectrometry Imaging approach

Every year, viticulture is facing several outbreaks caused by established diseases, such as downy mildew and grey mould, which possess different life cycles and modes of infection. To cope with these different aggressors, grapevine must recognize them and arm itself with an arsenal of defense strategies.
The regulation of secondary metabolites is one of the first reactions of plants upon pathogen challenge. Their rapid biosynthesis can highly contribute to strengthen the defense mechanisms allowing the plant to adapt, defend and survive.

Read More

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

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.

Read More

Early Elgo Demetra: the new pink table variety seedless with big berry and resistant

Context and purpose of the study – This paper presents is the create, the study and amplographic description the new pink “Early Elgo Demetra” variety.

Read More

Hormonal and associated metabolic changes in susceptible harvest-ripe grapes under asymptomatic and symptomatic Esca disease

Esca complex is a disease affecting grapevine trunks, characterized by the colonization of the wood by xylem-residing fungi (Phaeomoniella chlamydospora, Phaeoacremonium minimum and Fomitiporia mediterranea), and posing significant risks to vineyard longevity since no efficient treatment is available. Despite its prevalence, the mechanisms beyond symptomatic manifestations like interveinal chlorosis and leaf necrosis remain unclear. Preliminary findings indicated a more pronounced metabolic reprogramming in fruits compared to vegetative organs and a putative impact on wine quality by using fruits from symptomatic grapevines.

Read More

Identification of the agronomical and landscape potentialities in Côtes du Rhône area (France)

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.19.4" _module_preset="default" module_text_align="center" module_font_size="16px" text_orientation="center"...
Read More