terclim by ICS banner
IVES 9 IVES Conference Series 9 Application of Hyper Spectral Imaging for early detection of rachis browning in table grapes

Application of Hyper Spectral Imaging for early detection of rachis browning in table grapes

Abstract

Rachis browning is a common abiotic stress that occurs during postharvest storage, leading to a decrease in commercial value of table grapes and resulting in significant economic losses. Its early detection could enable the implementation of preventive strategies. In this report, we show the feasibility of a non-destructive early detection of browning based on Hyper Spectral Imaging (HSI). Furthermore, rachis samples were subjected to transcriptomic analysis to understand putative pathways causing differences in browning within varieties. The onset of visible browning of rachis was quantified with ImageJ software analysis in six different table grape varieties (red and white). The varieties investigated are novel table grapes obtained in an ongoing breeding program at CREA-VE in Southern Italy. After harvesting, the bunches were packed in cardboard boxes and stored for two weeks at 2°C with 95% relative humidity to evaluate the shelf-life. The berries were not removed from the grape bunch to follow the onset of browning on the same bunches. Anyway, due to differences in cluster and berry size, the internal area of the rachides was not always visible. Therefore, changes were followed in the apical portion of the rachides. A Specim IQ camera was employed for image detection in the laboratory and the Specim IQ Studio software was used to detect Areas Of Interest (AOIs). Differences in both the visible and Near Infra-Red (NIR) spectral regions were detected before the onset of browning of the rachides. It was possible to observe different changes in the spectral profiles among the varieties.

Download the abstract

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Article

Authors

Teodora Basile1*, Carlo Bergamini1, Lucia Rosaria Forleo1, Flavia Angela Maria Maggiolini1, Margherita D’Amico1, Antonio Domenico Marsico1, Rocco Perniola1, Luca Nerva2, Walter Chitarra2, Maria Francesca Cardone1

1 Research Centre for Viticulture and Enology, Council for Agricultural Research and Economics (CREA-VE), via Casamassima 148, 70010 Turi (BA), Italy
2 Research Centre for Viticulture and Enology, Council for Agricultural Research and Economics (CREA-VE), Via XXVIII Aprile 26, 31015 Conegliano (TV), Italy

Contact the author*

Keywords

Vitis vinifera, postharvest, image analysis

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

CHARACTERIZATION OF THE VOLATILE COMPOUNDS PROFILE OF COMMERCIAL GRAPPAS OBTAINED FROM THE POMACE OF AMARONE WINES

Grappa is a traditional Italian alcoholic beverage, with an alcohol content generally between 40-60% vol., obtained from the distillation of grape pomace used for the production of wine. Grappa are often aged in wooden barrels. There are various types of grappa: young, aromatic, aged, extra-aged depending on whether the distillate comes from aromatic vines or is aged in wooden barrels for shorter or longer periods. There is also flavored grappa if herbs, fruit or roots are added. All this makes it an extremely heterogeneous product both from an organoleptic and compositional point of view.

Read More

Trials with machine harvested sauvignon blanc: the importance of grape transport time and temperature

It is well known that free varietal thiols, in particular 3-mercaptohexanol (3MH) and 3-mercaptohexyl ace-tate (3MHA), are important constituents to the aroma of New Zealand Sauvignon blanc wines.

Read More

Influence of weather and climatic conditions on the viticultural production in Croatia

The research includes an analysis of the impact of weather conditions on phenological development of the vine and grape quality, through monitoring of four experimental cultivars (Chardonnay, Graševina, Merlot and Plavac mali) over two production years. In each experimental vineyard, which were evenly distributed throughout the regions of Slavonia and The Croatian Danube, Croatian Uplands,

Read More

Implications of grapevine row orientation in South Africa

Row orientation is a critical long-term viticulture practice, which may have a determining effect on grape and wine quality as well as cost efficiency on a specific terroir selected for cultivation.

Read More

The impacts of frozen material-other-than-grapes (MOG) on aroma compounds of red wine varieties

An undesirable note called “floral taint” has been observed in red wines by winemakers in the Niagara region caused by large volumes of frozen leaves and petioles [materials-other-than-grapes (MOG)] introduced during mechanical harvest and subsequent winemaking late in the season. The volatiles, which we hypothesized are responsible, are primarily terpenes, norisoprenoids, and specific esters in frozen leaves and petioles. The purpose of this study was to investigate the volatile compounds which may cause the floral taint problem and explore how much of them (thresholds) may lead to the problem. Also, the glycosidic precursors of some of these compounds were analyzed to see the changes happening during frost events.

Read More