• » Infowine Premium
  • » Impact of spatial variation in vine vigour on the accumulation of methoxypyrazines in the rachis

Impact of spatial variation in vine vigour on the accumulation of methoxypyrazines in the rachis

Ross Sanders; The University of Adelaide, CSIRO, ARC TC-IWP - Australia

Impact of spatial variation in vine vigour on the accumulation of methoxypyrazines in the rachis

The aim of this work by Ross Sanders, of the Australian Research Council Training Centre for Innovative Wine Production (ARC TC-IWP), The University of Adelaide, and Commonwealth Scientific and Industrial Research Organisation (CSIRO) Agriculture and Food, was to investigate the impact of spatial variation in vine vigour on the accumulation of methoxypyrazines in the rachis of Cabernet Sauvignon.

Cabernet Sauvignon rachis has been shown to contain significantly higher concentrations of 3-isobutyl-2-methoxypyrazine (IBMP) than that found in berry material. IBMP is readily extracted from rachis during fermentation and can impact the flavour profile of the produced wine.

In this study, Cabernet Sauvignon vines (n = 105) grown on common rootstocks in Coonawarra, South Australia, were georeferenced and 6 bunches were harvested from each vine at maturity in 2020. Berries were removed and the rachis was analysed for IBMP by GC-MS/MS. Pruning weights were recorded as an indicative measure of vegetative growth over the past season. Visualisation and analysis of map layers was achieved through linear regression models and k-means clustering with the Precision Agriculture Tools plugin for QGIS software suite.

Did the georeferenced maps of vine vigour and IBMP concentration in rachis show similar spatial variance? Was a clear relationship between the two variables evident across the vineyard? Find out how the k-Means clustering revealed 3 distinct zones, whether rootstocks or the inherent vineyard variability influenced vine vigour, and if vine vigour significantly correlatse with IBMP in Cabernet Sauvignon rachis. 

Video of the seminar held during Macrowine virtual (June 23-30, 2021)

Annual subscription to Infowine: The subscription, at a cost of € 60 (VAT included) entitles you to one year's access to all the documents published on the site, including the historical archive (click here).

Published on 06/14/2022
Premium Contents Area
  • VIDEO SEMINAR (Ross SANDERS, streaming 12 minutes)
Price:27 €(Tax included)
Related sheets
    Diversity in winemaking
    Infowine Focus
    Producing a wine according to our oenological objective, wanting to express the variety, but adapting practices according to the sanitary status of the grapes, is continuous experimentation. We aga...
    Published on:09/28/2022
    The aroma and taste of wine
    Infowine Focus
    Chemical, biochemical and physiological factors influence the composition of the retronasal aroma during wine consumption, but not only tannins influence mouthfeel: anthocyanins do too. New methods...
    Published on:01/05/2022
    Improve, enhance and modulate aromatic evolution
    Infowine Focus
    What's the importance of varietal thiols, esters and glycerol content from an organoleptic quality point of view? How do volatile compounds evolve during wine aging and storage conditions? Are ther...
    Published on:12/28/2021
    Oxygen and antioxidants
    Infowine Focus
    Oxygen consumption and wine resistance to oxidation can be measured and correlations can be found using cyclic voltammetry, and a modern metaboloic experiment produces new knowledge concerning wine...
    Published on:10/12/2021
    Improving wine quality during and after AF
    Infowine Focus
    A series of exclusive videos linked solely on how to improve our wine’s quality
    Published on:09/28/2021
    Grape ripeness assessment and initial processing of grapes
    Infowine Focus
    A couple of exclusive videos and an article linked to grape ripeness assessment and initial processing of grapes
    Published on:09/08/2021
© All Right Reserved
ISSN 1826-1590 VAT: IT01286830334
powered by Infonet Srl Piacenza
- A +
ExecTime : 1,983398