Variation in Total Phenolic Compounds, Anthocyanin and Monoterpene Content of ‘Muscat Hamburg’ Table Grape Variety (V. vinifera L.) as Affected by Cluster Thinning and Early and Late Period Basal Leaf Removal Treatments

Schwankungen im Gesamtgehalt an phenolischen-Verbindungen, Anthocyanen und Monoterpenen bei der Tafeltraubensorte (V. vinifera L.) ‘Muscat Hamburg’ als Ergebnis der Ausdünnung des Traubenbehanges und des frühen und späten Entfernens der basalen Blätter

Abstract

Cluster thinning (CT) and basal leaf removal (BLR) are common canopy management practices used in grape growing. In recent years, novel viticultural techniques have been evolved all around the world to decrease costs of yield management, causing improvement in grape quality. The purpose of this study was to evaluate the effects of CT and early and late period BLR treatments on yield and quality components of cv. ‘Muscat Hamburg’. While BLR treatments were performing at pre-bloom (PB, early), berry set (BS), berries with pea size (PS), verasion (V), CT treatment was conducted at verasion period. Compared to Control, while the total phenolic compounds content, total anthocyanin content, free volatile terpenes content and potentially volatile terpenes content were made better by CT treatment and BLR treatments applied from berry set to verasion period gradually raised all these quality components.

As a result, BLR-PB treatment from BLR treatments, which was alternative to usual cluster thinning treatment in yield controlling grapevines was especially determined as powerful tool for improving quality characteristics of cv. ‘Muscat Hamburg’.

Zusammenfassung

Die Ausdünnung des Traubenbehanges (CT) und das Entfernen der basalen Blätter (BLR) gehören zu den üblichen Laubwandarbeiten im Weinanbau. In den vergangenen Jahren haben sich weltweit neue Methoden etabliert, um Kosten im Erntemanagement zu senken und die Traubenqualität zu verbessern. Zweck dieser Studie war es, die Auswirkungen von CT- und frühen und späten BLR-Maßnahmen auf Ertrags- und Qualitätsparameter der Rebsorte ‘Muscat Hamburg’ zu untersuchen. Während die BLR-Maßnahmen vor der Blüte (PB, früh), zum Zeitpunkt des Beerenansatzes (BS), bei Beerenbehang in Erbsengröße (PS) und bei Reifebeginn (V) durchgeführt wurden, wurde die Ausdünnung des Traubenbehanges während der Verasion vorgenommen. Im Vergleich zu den anderen Varianten führten die Varianten CT und BLR-PB zu signifikant höherem Gesamtgehalt an phenolischen Verbindungen, Anthocyanen, freien flüchtigen Terpenen und potenziell flüchtigen Terpenen. Als Ergebnis lässt sich somit festhalten, dass sich von den BLR-Maßnahmen das frühe Entfernen der basalen Blätter als Alternative zur allgemein üblichen Ausdünnung des Traubenbehanges zur Ertragsregulierung in Reben als besonders wirksames Instrument herausgestellt hat, um die Qualitätskriterien bei der Rebsorte ‘Muscat Hamburg’ zu verbessern.

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Kok, D. Variation in Total Phenolic Compounds, Anthocyanin and Monoterpene Content of ‘Muscat Hamburg’ Table Grape Variety (V. vinifera L.) as Affected by Cluster Thinning and Early and Late Period Basal Leaf Removal Treatments. Erwerbs-Obstbau 58, 241–246 (2016). https://doi.org/10.1007/s10341-016-0283-9

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Keywords

  • V.Vinifera L.
  • Pre-bloom leaf removal
  • Cluster thinning
  • Phenolic compounds
  • Anthocyanins
  • Terpenes

Schlüsselwörter

  • V. Vinifera L.
  • Entblätterung vor der Blüte
  • Ausdünnung
  • Phenolische Verbindungen
  • Anthocyane
  • Terpene