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The objective of this study was to investigate the effects of different rootstocks on berry growth and compositions of 'Fujiminori' grapes (Vitis vinifera × V. labruscana). Berry growth, sugar, organic acid, amino acid, and anthocyanin contents in the berries were determined in 3-year-old vines grafted on seven different rootstocks : V. riparia × V.rupestris 3309, 3306 and 101-14, V. berlandieri × V. riparia Teleki 5C and 8B, and V. berlandieri × V. riparia SO•4 and 420A. The vines were grown in plastic containers in anunheated plastic house. Berry growth was more vigorous in vines grafted on 3309, 101-14, and 3306 than on 8B and 420A stocks. The ratio of seeded berries to total berries was significantly lower in vines grafted on 8B stock. Berries of vines grafted on 8B had the highest total soluble solids (TSS) followed in descending order by 3309, 3306, SO•4, 420A, 5C, and 101-14, The predominant sugars in both berry pulp and skin were glucose and fructose, irrespective of the rootstocks. Glucose and fructose contents in the pulp were higher in berries of vines grafted on 3309, 3306, and 8B than on 420A and 101-14 ; their values in the skin of berries from vines grafted on 101-14 and 5C were higher than those grafted on 420A and 3309. Titratable acidity of the juice was higher in the berries of vines grafted on 101-14 than on 8B and 420A and 3306 stocks. Regardless of rootstocks, tartaric and malic acids were the predominant organic acids in the berry pulp and skin. No significant difference in malic acid content was observed among the rootstocks. However, tartaric acid content was higher in the berries of vines grafted on 101-14 than on 8B and 420A stocks. Berries on vines grafted on 3306, 5C, 8B and SO•4 had higher levels of amino acids in the pulp than berries of vines grafted on 3309. Alanine, arginine, glutamine, and γ-aminobutyric acid constituted more than 70% of the total amino acids in the berry pulp, irrespective of the rootstock. The highest level of anthocyanin in the skin was observed in vines grafted on 3306, followed in order by those on 8B and 3309, berries of vine grafted on 101-14 had the lowest anthocyanin content.

Effects of Rootstocks on Sugar, Organic Acid, Amino Acid, and Anthocyanin Contents in Berries of Potted 'Fujiminori' Grapes.