Promotion of Coloration in 'BK Seedless' Grape (Vitis vinifera complex) with the Treatment of Girdling and Partial Cooling under High Temperature Condition

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  • Kajiwara Kohei
    Laboratory of Fruit Trees, University Farm, Faculty of Agriculture, Kyushu University
  • Seto Sonoko
    Laboratory of Fruit Trees, University Farm, Faculty of Agriculture, Kyushu University
  • Sakai Kaori
    Laboratory of Agroecology, Department of Bioresource Sciences, Faculty of Agriculture, Kyushu University
  • Wakana Akira
    Laboratory of Horticultural Science, Department of Bioresource Sciences, Faculty of Agriculture, Kyushu University

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Other Title
  • ブドウ'BK シードレス'の環状剥皮処理および局部冷却処理による高温条件下での着色促進
  • ブドウ'BK シードレス'ノ カンジョウハクヒ ショリ オヨビ キョクブ レイキャク ショリ ニ ヨル コウオン ジョウケン カ デ ノ チャクショク ソクシン

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Abstract

The effects of girdling or partial cooling of scaffold branches were investigated for the improvement of berry coloration in 'BK Seedless' grape (Muscat Bailey A × Kyoho) under the high temperature condition in summer. Girdling of 2cm width carried out around veraison promoted berry coloring and increased sugar content of the berries. Partial cooling of scaffold branches with running cool water (15℃) made the temperature in the inner part fall to some extent; however, the coloring treatment did not show the significant effect on berry coloration and quality.

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