Department of Pomology, University of California, Davis, California 95616.
Plant Physiol. 1980 May;65(5):1009-13. doi: 10.1104/pp.65.5.1009.
;Bartlett' pear (Pyrus communis) fruits were picked at the mature, green stage and ripened at 20 C. Fruits at different stages of ripeness (based on flesh firmness) were homogenized, and the sugar and uronic acid contents of cell wall and soluble polysaccharides were determined. Substantial amounts of galacturonic acid and arabinose were lost from the wall fraction as the fruit ripened. Most of this cell wall material was recovered, in an 80% (volume/volume) ethanol-insoluble form, from the soluble fraction of tissue homogenates. Structural analysis of ethanol-precipitable material indicates that it is an acidic (pectic) polymer-bearing side groups containing variously-linked arabinosyl residues.
巴特梨(Pyrus communis)果实于成熟绿色阶段采摘,并在 20°C 下成熟。将不同成熟阶段(基于果肉硬度)的果实均浆化,并测定细胞壁和可溶性多糖的糖和糖醛酸含量。随着果实成熟,大量半乳糖醛酸和阿拉伯糖从细胞壁部分丢失。大部分细胞壁物质以 80%(体积/体积)乙醇不溶性形式从组织匀浆的可溶性部分中回收。对乙醇可沉淀物质的结构分析表明,它是一种带侧基的酸性(果胶)聚合物,含有各种连接的阿拉伯糖残基。