A Comparative Study of the Structures of Xyloglucans from the Fruit Cell Walls of Four Apple Cultivars.

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  • Kato Yoji
    Laboratory of Food Science, Faculty of Education, Hirosaki University
  • Saito Sachiko
    Laboratory of Food Science, Faculty of Education, Hirosaki University
  • Mitsuishi Yasushi
    National Institute of Bioscience and Human Technology
  • Arakawa Osamu
    Faculty of Agriculture and Life Science, Hirosaki University
  • Motomura Yoshie
    Faculty of Agriculture and Life Science, Hirosaki University

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Other Title
  • リンゴ4品種の果実細胞壁に由来するキシログルカンの構造比較
  • Comparative Study of the Structures of Xyloglucans from the Fruit Cell Walls of Four Apple Cultivars

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Abstract

The oligosaccharide units of xyloglucans from four apple cultivars were analyzed by enzymatic digestion followed by anion-exchange chromatography with pulsed amperometric detection. The oligosaccharide units of the polysaccharides were XXXG, XXLG, XLXG, XXFG, XLLG and XLFG [where each (1→4)-β-linked D-glucosyl residue in the backbone is given a one-letter code according to its substituents: G=β-D-Glc;X=α-D-Xyl-(1→6)-β-D-Glc;L=β-D-Gal-(1→2)-α-DXyl-(1→6)-β-D-Glc;F=α-L-Fuc-(1→2)-(3a)-Gal-(1→2)-a-D-Xyl-(1→6)-β-D- Glc] in an apProx mate molar ratio of 23 :9: 12:26: 14: 16 for 'Starking Delicious, ' of 26:7 :7:28: 8 :24 for `Fuji, ' of 24:3 :8:27:5 :33 for `Ohrin, ' and of 24:2:8:28 : 3 :35 for `Ralls Janet (Kokko).' Present result clearly shows that apple xyloglucan contains structural oligosaccharide units, XXLG, XLXG and XLLG in addition to XXXG, XXFG and XLFG.

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