The Effect of Defoliation and Cluster Thinning on Phytochemical Components of Michele Palieri Table Grapes at Different Phenological Development Stages

Öz

In this study, the effects of defoliation and cluster thinning applied on grapevines at different phenological development stages on phytochemical components in the 110R rootstock grafted on to Michele Palieri vineyard in Tekirdağ province were investigated. The experiment was carried out for two years in 2018-2019 and 2019-2020 vegetation periods. Three phenological stages; Berry Set (BS), Bunch Closure (BS), Veraison (V); 4 different applications with Y1: Control, Y2: Cluster Thinning, Y3: Defoliation and Y4: Cluster Thinning+Defoliation were done. In order to reveal the phytochemical components: total soluble solids (%), total acidity (g-tartaric acid/L), pH, total anthocyanins (mg/kg), total tannins (g/kg), total polyphenol index (TPI), total phenolic contents (g/kg), and yield (kg/vineyard) were determined. As a result, total tannin, total polyphenol index and total phenolic substance content are high in cluster thinning application (Y2) of cv. Michele Palieri in Tekirdağ; however, defoliation application (Y3) with the highest yield, had the lowest total acidity value and therefore the lowest maturity index value. The effects of the applications on the total soluble solids, pH and pH2 x °Brix values were not determined. On the other hand, it has been found that the B phenological stage is the period where most of the criteria are high.

Anahtar Kelimeler

• Phytochemical Components
• M. Palieri
• Cluster Thinning
• Defoliation

Michele Palieri Sofralık Üzüm Çeşidinde Farklı Fenolojik Gelişim Aşamalarında Gerçekleştirilen Yaprak Alma ve Salkım Seyreltmenin Fitokimyasal Bileşenler Üzerine Etkisi

Öz

Çalışmada, Tekirdağ ilinde bulunan 110R anacına aşılı Michele Palieri bağında omcalar üzerinde farklı fenolojik gelişim aşamalarında gerçekleştirilen yaprak alma ve salkım seyreltme uygulamalarının, üzüm tanelerinin fitokimyasal bileşenleri üzerine olan etkileri araştırılmıştır. Deneme 2018-2019 ve 2019-2020 vejetasyon periyodlarında iki yıl süresince yürütülmüştür. Tane Tutumu (T), İri Koruk (İ), Ben Düşme (B) olmak üzere üç farklı fenolojik aşamada dört farklı uygulama Y1: Kontrol, Y2: Salkım Seyreltme, Y3: Yaprak Alma ve Y4: Salkım Seyreltme+Yaprak Alma yapılmıştır. Fitokimyasal bileşenleri ortaya koymak amacıyla: suda çözünebilir kuru madde oranı (%), toplam asitlik (g-tartarik asit/L), şıra pH’sı, toplam antosiyanin miktarı (mg/kg), toplam tanen miktarı (g/kg), toplam polifenol indeksi (TPI), toplam fenolik madde miktarı (g/kg) ve verim (kg/omca) belirlenmiştir. Sonuç olarak Tekirdağ ilinde Michele Palieri üzüm çeşidinde salkım seyreltme (Y2) uygulamasında toplam tanen, toplam polifenol indeksi ve toplam fenolik madde miktarı yüksek; ancak verimin en yüksek olduğu uygulama olan yaprak alma (Y3) en düşük toplam asitlik değerine ve dolayısıyla en düşük olgunluk indisi değerine sahip olmuştur. Yapılan uygulamaların suda çözünebilir kuru madde miktarı, pH ve pH2 x °Brix değerlerine etkisi saptanmamıştır. Öte yandan B fenolojik aşamasının çoğu kriterin yüksek olduğu aşama olduğu tespit edilmiştir.

Anahtar Kelimeler

• Fitokimyasal Bileşenler
• Michele Palieri
• Salkım Seyreltme
• Yaprak Alma

Kaynakça

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