Κατεύθυνση Αμπελουργία-Οινολογία και Αλκοολούχα ποτά
Library of the School of Science

2024-06-22

2024

Vlassopoulos Panagiotis

Αικατερίνη Μπινιάρη, Αναπληρώτρια Καθηγήτρια, Τμήμα Επιστήμης Φυτικής Παραγωγής, Γεωπονικό Πανεπιστήμιο Αθηνών, (Επιβλέπουσα),
Ιατρού Ερμόλαος: Καθηγητής, Τμήμα Χημείας ΕΚΠΑ,
Σταυρακάκη Μαριτίνα: Επίκουρη Καθηγήτρια, Τμήμα Επιστήμης Φυτικής Παραγωγής, Γεωπονικό Πανεπιστήμιο Αθηνών

Επίδραση καλλιεργητικών τεχνικών στους ποιοτικούς και ποσοτικούς χαρακτήρες της ποικιλίας "Ξινόμαυρο" (Vitis vinifera L.)

Greek

Effect of cultivation techniques on the qualitative and quantitative characters of the variety "Xinomavro" (Vitis vinifera L.)

In the present diploma thesis, the influence of various cultivation techniques on the qualitative and quantitative characteristics of the Xinomavro variety (Vitis Vinifera L.) was studied. Xinomavro is a red, multidynamic Greek variety with high phenolic potential and acidity, and therefore with great aging potential.
The samples were collected from stumps of seven different planting lines. Our aim was to study the effect of planting density, training system of lyre and use of foliar spray anti-diapirator preparations (kaolin and calcium carbonate). For comparison, one of the planting lines was used as a control using the producer's usual cultivation technique.
The samples were mechanically analyzed on berries and grapes (length, width, and weight) followed by measurements of the must (sugar content, total titratable acidity, and pH). Then the skins and the seeds were extracted, and measurements of phenolic components were performed. Using a spectrophotometer, total phenolics, total flavonoids, total flavones and flavonols, total flavanols, total ortho-diphenols and
concentrated tannins were quantitatively determined in skins and seeds. Antioxidant capacity was also measured with FRAP and DPPH methods. On the skins of our berries, we also measured total anthocyanins.
Using the HPLC analytical method (High-Performance Liquid Chromatography), the most important anthocyanins contained in the skins of our grapes were measured, as well as the most important organic acids contained in the must.
The results of the various cultivate interventions were differentiated in the must measurements, the mechanical analysis as well as in the quantity of phenolic components. The lyre showed the most remarkable results with high amounts of concentrated tannins in the seeds as well as the malvidine glycoside. Kaolin appears to have helped the rise of total phenolics, and calcium carbonate increased total
flavonoids in seeds and skins. Planting density caused an increase in malic and ascorbic acid of the grapes in the first 2 lines of planting.

Science

Xinomavro, kaolin, calcium carbonate, lyre, planting density, HPLC, phenolic compounds, Vitis vinifera L

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https://pergamos.lib.uoa.gr/uoa/dl/object/3401673