GiESCO 2019 banner
IVES 9 IVES Conference Series 9 GiESCO 9 Advancement of grape maturity – comparison between contrasting varieties and regions

Advancement of grape maturity – comparison between contrasting varieties and regions

Abstract

Context and purpose of the study – Grapevine phenology has advanced across many regions, nationally and internationally, in recent decades under the influence of increasing temperatures, resulting in earlier vintages (Jones and Davis, 2000, Petrie and Sadras, 2008, Tomasi et al., 2011, Webb et al., 2011. Earlier vintages have several ramifications for the wine industry. There are direct implications on quality, due to the fruit ripening during the hotter conditions of summer and early autumn, which then impacts grape composition and wine style (Sadras et al., 2013, Buttrose et al., 1971, Mira de Ordũna, 2010). There are also indirect implications where the fruit is perceived to ripen at a faster rate and the crop reach optimum maturity over a shorter period (Coulter et al., 2016). This can result in the grapes being harvested according to the winery processing schedule rather than when they are optimally ripe. This study aims to advance our understanding of the response of different varieties and regions to warming temperatures.

Materials and Methods – This research utilized an historical data set, covering 18 years, multiple varieties and four separate vineyard sites located in different climatic zones in Victoria, Australia. The data were analysed using mixed models to understand differences in the day of year maturity changes between varieties and vineyard sites.

Results – The data analysis suggested that the rate of advancement of day of maturity as a function of seasonal Growing Degree Days (September to March) varies significantly between varieties with some varieties being quite resistant to the temperature increases being experienced. There is some evidence that later ripening varieties are advancing their day of year maturity at a more rapid rate than earlier ripening varieties which helps to explain the vintage compression being observed in Australia. While yield had a significant association with the day of year maturity for some varieties, this was found to be an additional effect and not at the expense of the response to temperature indices. An understanding of how different varieties are responding to changing climates will assist in future planting decisions and determine how to best adapt to climate change. It will also demonstrate the degree of genetic variation available in modern grape varieties in response to changing vineyard climates, which varieties are the most resilient and how they may best be managed.

DOI:

Publication date: September 27, 2023

Issue: GiESCO 2019

Type: Poster

Authors

Wendy CAMERON1, Sigfredo FUENTES1*, EWR BARLOW1, Kate HOWELL1 and Paul R. PETRIE2

1 University of Melbourne, Faculty of Veterinary and Agricultural Sciences, VIC 3010, Australia

2 South Australian Research and Development Institute, Waite Research Precinct, Urrbrae, SA 5064, Australia

Contact the author

Keywords

day of year maturity, growing degree day, spring index

Tags

GiESCO | GiESCO 2019 | IVES Conference Series

Citation

Related articles…

La perception des terroirs du vignoble des Coteaux du Layon

On peut être surpris de l’existence d’un vignoble de vins liquoreux, le vignoble des Coteaux du Layon, dans une zone septentrionale à la limite Nord de la culture de qualité de la vigne et ce d’autant plus que le cépage de ce vignoble, le Chenin ou Pineau de la Loire, est un cépage semi tardif. La première explication est à rechercher au niveau des facteurs naturels (données climatiques et géopédologiques) permettant la réalisation de ce type de produit. Il est nécessaire de souligner ici l’importance de chaque paramètre du terroir pris dans im sens large (géopédologique et climatique) et que toute variation de l’un d’entre eux, même non perceptible en première analyse à l’homme, peut avoir des incidences déterminantes sur la qualité des vins.

Viticultural characterisation of soils from triassic period at Beaumes-de-Venise (Côtes du Rhône, France)

Wineries of Beaumes-de-Venise area make their best red wines with grapes from the “Triassic terroir”. This « terroir » is characterized by soils from the Triassic period. These specific soils are complex and quite heterogeneous. They originate from an eventful geological history to keep in mind to understand soils geographical distribution.

IBMP-Polypenol interactions: Impact on volatility and sensory perception in model wine solution

3-Isobutyl-2-methoxypyrazine (IBMP) is one of the key molecules in wine aroma with a bell pepper aroma and a very low threshold in wine, 1-6 ng/L for white wine and 10-16 ng/L in red wine1. The differences in these thresholds are likely due to IBMP-non volatile matrix interactions. It has indeed been shown that polyphenols may influence the volatility of flavor compounds2. In the present study, we focus on IBMP-polyphenols interactions in relation to volatility and sensory perception in model wine solution. Methods: 1. GC-MS Static Headspace Analysis: Samples were analyzed by Static headspace analysis with an Agilent 7890A gas chromatograph coupled to HP 5975C mass spectrometry detector (Agilent Technologies, Santa Clara, CA, USA).

A new chemiluminescence method related to molecules derived from Botrytis cinerea for characterization of Aszu wines from Tokaj, from Hungary

For the chemical characterization of Aszu wines from Tokaj region our aim is to develop a biochemical method which is related to Botrytis cinerea.

Bacterial community in different wine appellations – biotic and abiotic interaction in grape berry and its impact on Botrytis cinerea development

An in-depth knowledge on the conditions that trigger Botrytis disease and the microbial community associated with the susceptibility/resistance to it could led to the anticipation and response to the Botrytis emergence and severity. Therefore, the present study pretends to establish links between biotic and abiotic factors and the presence/abundance of B. cinerea.