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Completed Projects

Identity and ecophysiology of glycogen accumulating organisms in winery wastewater

  • Date Completed: 2015-09-30
  • Project Supervisor: Onetto, Cristobal

Winery wastewater (WWW) samples containing Glycogen Accumulating Organisms (GAO) were analysed using NanoSIMS (nanoscale secondary ion mass spectrometry). The main objective of this study was to observe the effect of nitrogen addition on the carbon metabolism of WWW bacteria. Incubations with different ratios of stable isotope labelled substrates were performed prior to analyses. Images showing the intracellular 15N and 13C enrichment of GAO were obtained. Significant differences were observed in the 15N and 13C levels of GAO incubated with different carbon:nitrogen ratios.

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Incoming Scholars Program

  • Date Completed: 2014-12-01
  • Project Supervisor: Waters, Chris

The ASVO organises and conducts seminars on specialised topics to promote education in viticulture and oenology.The purpose of inviting international scholars to Australia is to allow them to interact with researchers and industry, giving an international perspective, and to present at the ASVO seminar in Adelaide. The aim of the Adelaide seminar was to present some of the latest viticultural and winemaking research findings, as well as some new and existing techniques and management options that could help growers to improve fruit quality and vineyard profitability at all production price points; a key component in improving the profitability of winegrape production in Australia. This report summarises the activities and key outcomes presented by both scholars at the seminar.

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Participation in the 11th Pangborn Sensory Science Symposium Gothenburg Sweden 23-27 August 2015

  • Date Completed: 2015-08-31
  • Project Supervisor: Bastian, Assoc Prof Susan

The Pangborn Sensory Science Symposium is an international meeting of sensory and consumer scientists held biannually. The award of this travel grant permitted University of Adelaide academic, Associate Professor Sue Bastian to; 1. attend and present two posters in the 11th  Symposium in  August  2015; 2. meet  with  her collaborators; and 3. network with other scientists.

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Improving the tannin composition of grapes

  • Date Completed: 2015-06-30
  • Project Supervisor: Walker, Dr Mandy

This project used genetic manipulation of grapevines as a proof of concept to improve the tannin composition of winegrapes. The efficiency of the system for producing transgenic grapevines was significantly improved and used to alter expression of three key genes of the tannin synthesis pathway. This resulted in altered tannin content and composition in leaves and grapes from the transgenic grapevines. Depending on the gene targeted, the tannin composition was selectively altered in skins or seeds of the berries. Micro-scale fermentation of grapes from the transgenic vines was used to assess the impact on wine colour and tannin.

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Identifying vineyard and winery management practices that impact on tannin extraction

  • Date Completed: 2015-06-30
  • Project Supervisor: Kilmister, Dr Rachel

The effect of harvest date, fermentation temperature and canopy management on tannin extraction was investigated to assist in viticultural and winemaking decisions to manage tannin levels in wine. Tannin extractability was determined in Shiraz grapes harvested at six different times during ripening in two seasons and fermented at three different temperatures. The effects of thirteen vineyard floor and irrigation canopy management treatments on tannin extractability were also determined on seven different sites

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2015 In Vino Analytical Scientia Symposium

  • Date Completed: 2015-07-23
  • Project Supervisor: Wilkinson, Dr Kerry

This travel grant enabled Dr Kerry Wilkinson to attend the In Vino Analytica Scientia Symposium (between the 14th and 17th July, 2015) and to visit collaborators from the University de Castilla Le Mancha, in Albacete Spain (on the 20th and 21st July, 2015). The symposium was held in Mezzacorona in Italy and focussed on: Chemical analysis and composition of grapes, wines and spirits; Chemical and biochemical reactions; Metabolomics, chemometrics and authenticity of products; and sensory analysis. Attendance at the symposium provided an excellent opportunity to gain knowledge of recent advances in grape and wine research, as well as to disseminate recent research findings, via a poster titled ‘Understanding consumer preferences for Australian sparkling wines vs. French Champagne’. The conference also provided numerous networking opportunities, during which new and existing collaborations were pursued. Importantly, the trip also afforded an opportunity to visit and meet with the research group of Professor Rosario Salinas (University de Castilla de Mancha, Albacete, Spain), for the purpose of discussing ongoing collaborative research into the influence of foliar applications of oak extract and oak volatiles to grapevines on fruit, leaf and shoot composition; work also presented in poster form at In Vino Analytica Scientia.

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Oral and poster presentation at IVAS 2015 (Trento, Italy)

  • Date Completed: 2015-07-20
  • Project Supervisor: Gambetta, Joanna

The InVino 2015 symposium was held in the town of Mezzocorona in Italy, from the 14th to 17th of July. The symposium was attended by approximately 250 participants from different research groups from around the world and covered the following topics: • Chemical analysis and composition of grapes, wines and spirits (2 sessions) • Chemical and biochemical reactions • Metabolomics, Chemometrics and Authenticity of products • Sensory analysis The travel grant allowed Joanna Gambetta to attend the InVino 2015 symposium and deliver an oral presentation titled “Creation of a wine quality prediction index; Correlation of aroma precursors developed in Chardonnay (Vitis vinifera L.) berries during ripening with final wine quality” as well as the poster titled “Prediction of phenolic composition of Shiraz wines using attenuated total reflectance mid-infrared (ATR-MIR) spectroscopy”. Conference attendance also provided the opportunity to gain new knowledge on the latest advances in wine analytical science and the current topics being researched across the world, as well as the chance to network with established researchers of the field.

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Australia-Italy Wine and Wheat Symposium (incoming scholars bursary)

  • Date Completed: 2015-12-30
  • Project Supervisor: Walker, Dr Rob

With funding from the Embassy of Italy, National Research Council of Italy, Wine Australia and Grains Research and Development Corporation (GRDC) and with significant in-kind input from CSIRO, two Symposia were held, one in Canberra (Grape and Wheat Symposium) and one in Adelaide (Grape and Wine Symposium), both in early December 2015. The Symposia were well attended and achieved the goal of strengthening existing collaborations and establishing new collaborations between Italian and Australian researchers. The Symposia were supplemented by visits to the Canberra and McLaren Vale Wine Regions. This provided an opportunity to view Italian grapevine varieties and their adaptation to Australian conditions. Wines of the Australian-grown Italian varieties were tasted. Meetings were also held between the visiting Italian scientists (three wheat and four grape and wine) and CSIRO and other agency scientists. A dinner was held at the Embassy of Italy for all invited speakers at the Canberra Symposium and invited guests. Wine Australia and industry representatives attended the Adelaide Symposium. Peter Hayes, former President of the OIV (Organisation International de la Vigne et du Vin) and current Deputy Chancellor of Charles Sturt University, attended the McLaren Vale vineyard and winery tour with the visiting Italian grape and wine scientists. A report on the Symposia and associated activities has been prepared and will be provided to an Australian Wine Industry Journal for future publication (likely to be Grape Grower and Winemaker, March 2016 issue).

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Maximising quality during bulk wine transport

  • Date Completed: 2015-06-30
  • Project Supervisor: Nordestgaard, Dr Simon

Wine sensory and chemical composition and temperature were tracked and assessed in a series of bulk wine shipments between Australia and the UK. No major sensory differences before and after wine transport, or between wine transportation techniques were observed in this study. The full report is available to Australian grape and wine research R&D levy payers from the AWRI helpdesk by emailing helpdesk@awri.com.au or phoning +61 8 8313 6600.

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