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…

ANALYZING THE ROLE OF ELEMENTAL SULFUR IN GRAPE JUICE ON THE DEVELOPMENT OF POLYFUNCTIONAL MERCAPTANS IN SAUVIGNON BLANC WINES

Sauvignon blanc is characterized by distinctive aromas, both fruity and herbaceous. The “green” character has been attributed to the methoxypyrazines, while the “fruity” character is associated with polyfunctional mercaptans . Polyfunctional mercaptans are of great significance due to their high impact on wines and associated low perception thresholds.
Elemental sulfur (S⁰) is widely used to protect grapevines from powdery mildew.

Read More

Mycorrhizal symbiosis modulates flavonoid and amino acid profiles in grapes of Tempranillo and Cabernet Sauvignon 

Arbuscular mycorrhizal fungi (AMF) symbiosis is probably the most widespread beneficial interaction between plants and microorganisms. AMF has been widely reported to promote grapevine growth, water and nutrient uptake as well as both biotic and abiotic stress tolerance[1]. However, the impact of AMF on grape composition has been less studied. The aim of this work was to evaluate the effects of the association between two commercial grapevine cultivars (Tempranillo and Cabernet Sauvignon grafted onto 110 rootstock) and AMF on the anthocyanin, flavonol and amino acid concentrations and profiles of grapes.

Read More

Exploring the use of high-power ultrasound in white and rosé winemaking

Since the approval in 2019 of the use of high-power ultrasound (US) in winemaking to support extractive processes from grape to must, the study of this technology in red winemaking has increased significantly, with laboratory and semi-industrial scale studies.

Read More

Soil monoliths, soil variability and terroir

Aim: The aim of this work is educating people about soil variability and terroir. Soil monoliths are used to educate the wine industry about how to describe a soil profile, interpret the soil formation processes operating in a particular soil profile and consequently the impact of soil properties on vine growth, fruit quality and wine production. Soil monoliths are a permanent artistic tool for educating, research and management of soil variability.  

Read More

Study of the colour and phenolic evolution of three different tannin/anthocyanin ratios over time in a model wine

Phenolic compounds are important quality indicators in red wine. A large number of polyphenols play an important role in wine development, contributing to the colour and the sensory perception of the wines. Anthocyanins are the pigments responsible for the colour in young red wines while tannins are the principal contributors to the bitterness and the astringency of the wines. Wine polyphenols are considered more complex molecules than grape phenolics, due to the enormous number of chemical reactions which take place during the entire winemaking process and storage, forming more stable compounds.

Read More