Archive for the ‘Communication paper’ Category

By: Sigfredo Fuentes

Presentation given at the Matlab tour 2013, Melbourne – Australia

To view proceedings CLICK HERE

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Climate change related phenomena like higher temperatures, increased carbon dioxide concentration in the atmosphere, and more frequent and intensive climatic anomalies, such as heat waves and floods, have placed great pressure on agricultural production around the world. In this scenario, agriculture research and production requires more intensive spatial and temporal monitoring of critical variables to assess the effects of climate change on plant physiology, growth, and fruit quality. Image analysis is becoming an important component in modern agriculture and horticulture. It allows the use of inexpensive devices to acquire meaningful information on crop growth, water status, and quality. In the past, these kinds of technology and analysis were too expensive and required specific know how, which was not readily available to growers. This presentation describes the tools used to solve this problem, such as automated analysis of RGB images and video of plant material, scanned images, and infrared thermal images of canopies to assess plant growth and canopy architectural parameters, leaves and fruit development and plant water status. Results from proposed analysis tools have shown similar outcomes in accuracy and robustness compared to more established techniques. The presenter has developed automated image and video analysis codes using the following MATLAB tools: Image Acquisition Toolbox™, Image Analysis Toolbox™, and Statistical Toolbox™.

THE EXTREME EFFECTS of climate change are taking their toll on the viticulture industry, making the future of vineyards here and abroad uncertain. Which is why University of Melbourne wine science lecturer Dr Sigfredo Fuentes and a team of researchers around the world are developing a project to better arm the industry against that change. Vineyard of the Future (VoF) is being conducted in Australia, Chile, Spain and the US.

Full Article: VOF 2014 IR

By Sigfredo Fuentes1* , Roberta De Bei2  and Stephen Tyerman2

1 University of Melbourne, Melbourne School of Land and Environment, Victoria 3010, Australia

2 School of Agriculture Food and Wine and Waite Research Institute, The University of Adelaide, Plant Research Centre,

Waite Campus, PMB 1 Glen Osmond, SA 5064, Australia

* Corresponding author: sfuentes@unimelb.edu.au

Recent research has boosted understanding of the dynamics of night-time transpiration and water

rehydration of plants and grapevines, with the aim of obtaining amelioration strategies to maximise

water use efficiency for crops under a challenging climate.

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Read full article here: Nighttimegrapevines

 

 

 

Dr Sigfredo Fuentes (Lecturer in Wine Science. The University of Melbourne – Australia)

Full article: Press here: ChileriegoInterview

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Link to full article: Fuentes et al-MayJune13WVJ

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Picture: Octocopter from VOF – Chile

Communication paper published at the Wine and Viticulture Journal (November – December 2012 issue).

Link to paper: Fuentes-NovDec12WVJ

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One of the aims of the VoF project is to investigate the effects of climate change on berry shrivel and berry cell death. Specifically due to predicted night-time temperatures increasing at a higher rate compared to diurnal temperatures, which might exacerbate this phenomena.

Cell death in winegrape berries may be a double-edged sword! It can be correlated with berry shrinkage but also related to flavour and sugar concentration. This article looks at shiraz, chardonnay and sultana berries, in terms of cell death and shrinkage.

Cell death occurs in pre-harvest berries of chardonnay and shiraz but not sultana. However, only shiraz consistently shrinks. This concentrates sugar and can lead to high alcohol wines. Shiraz is shown to be the ‘biggest loser’ in terms of weight loss but the flavour development and sugar concentration aspects are the other side of the double-edged sword.

Paper: Is the shiraz berry the biggest loser? The double-edged sword of cell death in winegrapesProfessor Steve Tyerman, Dr Sigfredo Fuentes, Dr Cassandra Collins and Dr Sue Bastian. August edition 2012 of Australian and New Zealand Grapegrower and Winemaker. 

Link to paper: Cell Death_Steve D. Tyerman

Figures:Cell death study using FDA (fluorescein diacetate). Images taken under microscope for Chardonnay, Shiraz and Sultana berries. Living tissue in mesocarp of berries corresponds to bright sections (fluorescence).