Roberta De Bei

Roberta De Bei
University of Adelaide

About

71
Publications
19,646
Reads
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693
Citations
Citations since 2016
48 Research Items
577 Citations
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2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120
2016201720182019202020212022020406080100120

Publications

Publications (71)
Article
Full-text available
There is increasing scientific consensus that climate change is one of the underlying causes of the prolonged dry and hot conditions that have increased the risk of extreme fire weather inmany countries around the world. In December 2019, a bushfire occurred in the Adelaide Hills, South Australia, where 25,000 hectares were burnt, and in vineyards...
Article
Full-text available
Bunch thinning is a widespread management practice in vineyards and it has been reported to improve grape and wine quality depending on the timing and intensity of its application. This study assessed whether bunch thinning could affect vine performance, grape and wine chemistry and sensory attributes for Shiraz and Semillon in a hot Australian cli...
Article
Full-text available
Decisions made during the establishment and reworking of permanent cordon arms may have long-term consequences on vineyard health and longevity. This review aims to summarise several of the important considerations that must be taken into account during cordon establishment and maintenance. Commonly practiced cordon training techniques such as wrap...
Article
Full-text available
Under the effects of climate change, it is becoming increasingly common to observe excessively fast grape sugar accumulation while phenolic and flavour development are lagging behind. The aim of this research was to quantify the impacts of three different leaf removal techniques on the canopy architecture and ripening of Cabernet Sauvignon trained...
Article
Full-text available
This study aimed to validate the use of UAV-based point cloud analysis to detect canopy decline severity and its spatial distribution in vineyards.A new approach to assess canopy decline, caused by Eutypa dieback-like symptoms, using unmanned aerial vehicle (UAV) remote sensing was compared with ground visual assessment in the vineyard. Canopy poin...
Article
Full-text available
A wines’ terroir, represented as wine traits with regional distinctiveness, is a reflection of both the biophysical and human-driven conditions in which the grapes were grown and wine made. Soil is an important factor contributing to the uniqueness of a wine produced by vines grown in specific conditions. Recent data shows that the composition, div...
Article
Full-text available
Aim: To analyse unmanned aerial vehicle (UAV)-based imagery to assess canopy structural changes after the application of different canopy management practices in the vineyard. Methods and results: Four different canopy management practices: i–ii) leaf removal within the bunch zone (eastern side/both eastern and western sides), iii) bunch thinning a...
Article
Full-text available
Wildfires are an increasing problem worldwide, with their number and intensity predicted to rise due to climate change. When fires occur close to vineyards, this can result in grapevine smoke contamination, and subsequently, the development of smoke taint in wine. Currently, there are no in-field detection systems that growers can use to assess whe...
Preprint
Full-text available
Soil is an important factor that contributes to the uniqueness of a wine produced by vines grown in specific conditions. Recent data shows that the composition, diversity and function of soil microbial communities may play important roles in determining wine quality and indirectly affect its economic value. Here, we evaluated the impact of environm...
Article
I DIRADARE ne vale la pena? Il diradamento dei grappoli e dei germogli sono due diverse pratiche comunemente utilizzate nella ge-stione dei vigneti. L'obiettivo è quel-lo di migliorare la qualità dell'uva in linea con la diffusa convinzione che i vini migliori siano prodotti con uve provenienti da vigneti a bassa vigo-ria e produttività. DIRADAMENT...
Article
Shoot and bunch thinning are common practices used in vineyard management with the overall aim of improving fruit quality based on the widespread findings that have related the production of good wines with lower canopy vigour and low yielding vineyards.
Article
Full-text available
Background and Aims: Bud fruitfulness is a critical component of grapevine reproductive performance as it determines crop production for the following growing season. Canopy microclimate can impact on bud fruitfulness. However, the effects of canopy management practices on bud fruitfulness are not well known. The objective of this study was to inve...
Article
Full-text available
Aim – Shoot thinning is a common canopy management practice used to obtain a desired canopy shoot density and improve the canopy microclimate. The cost of such technique, since it is often carried out manually, can be high. In this study the effect of severe shoot thinning (50% of shoots removed) applied at EL 15 was investigated by comparing yield...
Article
Full-text available
This study investigated the effectiveness of infrared thermography to estimate water status in Merlot and Moscato grown in northeast Italy by comparing the crop water stress index (CWSI) and the stomatal conductance index (IG). The influence of the portion of the canopy in which the thermal images were captured (sunlit or shaded) was also investiga...
Article
Full-text available
Vineyards are inherently variable however, the majority of them are managed on the assumption of uniformity. Understanding vineyard variability to target management strategies, apply inputs efficiently and deliver consistent grape quality to the winery is now essential. Moreover, canopy management, together with irrigation and fertilisation, is one...
Article
Full-text available
Grapegrowing areas worldwide are experiencing earlier and compressed phenology because of higher temperatures, which has led to excessive sugar accumulation in grapes. This is associated with negative effects on grape and wine quality and higher alcohol in wines. Recent research has shown that early, climate-related ripening can be ameliorated by l...
Article
Full-text available
Bushfires are becoming more frequent and intensive due to changing climate. Those that occur close to vineyards can cause smoke contamination of grapevines and grapes, which can affect wines, producing smoke-taint. At present, there are no available practical in-field tools available for detection of smoke contamination or taint in berries. This re...
Poster
Full-text available
Grapevine reproduction is an intricate process that extends over two growing seasons The conditions of the season not only influence reproductive growth of the current year, but also affect bud fruitfulness and hence potential yield for the following year. Canopy management practices are widely adopted in vineyards to maintain a balance between veg...
Article
Traditional grape growing areas world wide are experiencing earlier and compressed phenology due to higher temperature and irradiance which has led to excessive sugar accumulation in grapes. This is associated to negative effects on the grape and wine quality due to higher alcohol content in wines. Recent research has shown that this early, climat...
Article
Canopy management techniques can be beneficial to grapevines reproduction as they improve canopy structure and microclimate. In this study the influence of different canopy management practices: bunch thinning, leaf removal, shoot thinning and light pruning on reproductive performance was studied for Semillon and Shiraz grapevines grown under field...
Poster
Full-text available
RESULTS: Genotyping: A total of 4893 SPNs were identify from the GBS. PCA of the genetic profile didn't show any genetic structure (Fig. 2). DNA methylation: Analysis of DNA methylation identified 730,495 msGBS loci. PC-LDA of the DNA methylation markers clearly show clustering by each of the sub-regions of the Barossa Wine Region (Fig. 3). Gene ex...
Article
Climate change predictions of increasing CO2 concentration, temperature and a decline in water availability for irrigation have prompted research to develop rapid and accurate plant-based monitoring tools to help assess plant performance under environmental stresses. In this study, an adaptation of Near Infrared (NIR) spectroscopy was investigated...
Conference Paper
Full-text available
Australian vineyards need to continue to produce high quality fruit to remain competitive in the global market. Vine development, grape ripening and wine sensory attributes are highly influenced by the physical environment in which the vines grow and their management. Hence, vineyard practitioners use a variety of management practices in order to c...
Technical Report
Full-text available
Canopy management trials conducted in commercial vineyards and at the Waite campus, University of Adelaide, demonstrated that a new tool, VitiCanopy, was effective at capturing canopy architecture differences that resulted in fruit and wine compositional changes and berry and wine sensory differences. Vine balance is more easily measured with VitiC...
Poster
Full-text available
Bushfire has become a major threat in viticulture and wine production worldwide, and recently devastated wine producing regions in Chile and California. In Australia, the bushfire window has broaden, and predicted to increase in frequency and severity. • Thebiggestimpactofbushfireistheproductionofsmokethatcontaminatesgrapesin the surrounding areas....
Article
Old vineyards are often suggested to be superior to younger ones, a claim that has scarcely been investigated scientifically. The aim of this study was to investigate if vineyard age influences vine performance. Five commercial Shiraz vineyards in the Barossa Valley, SA, were selected; each site contained younger vines, which had been vegetatively...
Article
Carbohydrate assays are commonly used in crops and plant research to understand the way in which carbohydrates are allocated within the vine and to assess its influence on the physiology and phenology of the plant. Total non-structural carbohydrate (TNC) concentration is normally assessed by wet chemistry methods which are time consuming and costly...
Article
The Wine & Viticulture Journal has previously kept readers informed of some of the latest outcomes from the Vineyard of the Future (VoF) - a multinational project whose aims include testing new technologies and investigating the potential effects of climate change in trial vineyards. This article explores the latest successes from the VoF project –...
Article
Full-text available
Leaf area index (LAI) and plant area index (PAI) are common and important biophysical parameters used to estimate agronomical variables such as canopy growth, light interception and water requirements of plants and trees. LAI can be either measured directly using destructive methods or indirectly using dedicated and expensive instrumentation, both...
Article
Full-text available
Smoke was applied to seven different grapevine cultivars (Chardonnay, Sauvignon Blanc, Pinot Gris, Pinot Noir, Shiraz, Cabernet Sauvignon and Merlot) for 1 h at approximately 7 days post-veraison. A range of viticultural measurements were subsequently performed to evaluate any effects on crop yield, vegetative growth and vine physiology. Few signif...
Data
A smartphone and tablet app has been developed by a team from The University of Adelaide and The University of Melbourne enabling growers to characterise the canopy architecture and leaf area index of their grapevines. The capabilities of the app could see it become an important tool for growers, irrigation practitioners and scientists to assess sp...
Conference Paper
Full-text available
Wines produced from 'young' grapevines allegedly lack the complexity and quality of 'old' vine wines. There is increasing evidence that epigenetic mechanisms such as DNA methylation contribute to important agronomic traits. While genetic traits are fixed during the life cycle of an individual, environmental exposure and stochastic processes during...
Article
Background and AimsMonitoring of canopy vigour is an important tool in vineyard management to obtain balanced vines (vegetative vs reproductive organs). Leaf area index is the main parameter representing canopy vigour. Our aim was to test an automated computational method to obtain leaf area index and canopy vigour parameters from grapevines with d...
Article
Night-time water uptake (Sn) mainly corresponds to stem and organ rehydration and transpiration, the latter through stomata and cuticle. Nocturnal transpiration is uncoupled from photosynthesis, therefore it contributes to reduce water use efficiency (WUE). Night-time grapevine physiology was measured on field grown grapevines (cv. Shiraz) under pa...
Data
Full-text available
Abstract Background and Aims: Near infrared (NIR) spectroscopy techniques are not only used for a variety of physical and chemical analyses in the food industry, but also in remote sensing studies as tools to predict plant water status. In this study, NIR spectroscopy was evaluated as a method to estimate water potential of grapevines. Methods and...
Article
R ecent research on grapevines has challenged the paradigm that C3 and C4 plants do not transpire at night-time due to complete stomata closure. It has been shown that grapevine water loss by transpiration at night-time can reach up to 50 percent of the day-time transpiration depending on the level of aridity and water stress (Rogiers and Clarke 20...
Article
Full-text available
Monitorizar la arquitectura de la canopia en la vid es importante a la hora de valorar el crecimiento, el vigor y la transmisión de la luz al fruto y a las flores, parámetros que se reflejan en el rendimiento, la calidad de la uva y la productividad. Uno de los más importantes es el índice de área foliar, difícil de medir o de estimar, ya que requi...
Article
Infrared thermal images (IRTI) have been used for grapevine research since the early 90’s. Even though its promising results in the assessment of canopy stomatal conductance and plant water status, from the beginning and recent research publications, it has not been fully applied on a commercial scale yet. It is believed that the bottleneck for thi...
Article
A smartphone and tablet app has been developed by a team from The University of Adelaide enabling growers to characterise the canopy architecture and leaf area index of their grapevines. The capabilities of the app could see it become an important tool for growers, irrigation practitioners and scientists to assess spatial and temporal growth and ca...
Article
Thermal imaging of crop canopies has been proposed more than a decade ago as a sensitive methodology to determine the water status of different crops. This paper describes the development of a semi-automated and automated methodology using MATLAB® programming techniques to analyse the infrared thermal images taking into consideration the pitfalls p...
Article
Background and Aims: Near infrared (NIR) spectroscopy techniques are not only used for a variety of physical and chemical analyses in the food industry, but also in remote sensing studies as tools to predict plant water status. In this study, NIR spectroscopy was evaluated as a method to estimate water potential of grapevines. Methods and Results:...
Conference Paper
Maintaining crop yield and quality in the face of reduced water supply has come in to sharp focus in recent times and will become increasingly important as we learn to adapt to the predicted effects of rising CO2 concentrations. Irrigation scheduling will become just one tool amongst many to combat the negative impacts of global warming. Te grapevi...