沙土地、黄绵土和连作地中生长的盾叶薯蓣多糖的特性比较。
Characterisation comparison of polysaccharides from Dioscorea opposita Thunb. growing in sandy soil, loessial soil and continuous cropping.
机构信息
Key Laboratory of Natural Medicine and Immune-Engineering of Henan Province, College of Chemistry and Chemical Engineering, Institute of Environmental and Analytical Sciences, Pharmaceutical College, Henan University, Kaifeng 475004, China.
Department of Food and Nutritional Science, University of Reading, Whitenights, Reading RG6 6AP, UK.
出版信息
Int J Biol Macromol. 2019 Apr 1;126:776-785. doi: 10.1016/j.ijbiomac.2018.12.259. Epub 2018 Dec 29.
This study compared the characterisations of polysaccharides from Chinese yam (Dioscorea opposita Thunb.) growing in sandy soil (SSCY), loessial soil (LSCY) and second-year continuous cropping (CCCY). SSCY contained the highest total polysaccharides (36.55%) and 80.19% glucose, CCCY from sandy soil obtained 24.55% polysaccharides with 43.66% glucose, whereas LSCY contained 27.54% total polysaccharides and 7.94% glucose. The results indicated that Dioscorea opposita from sandy soil may obtain higher level of glucose. CCCY increased the galacturonic acids in yams from 7.03% to 26.19%, which may have been caused by the decrease in soil pH due to continuous cropping. The starches of SSCY and CCCY from sandy soil belongs to C-type, whereas the starch of LSCY from loessial soil has the A-type pattern. The results suggested that the two types of soil and continuous cropping change the compounds and contents of yams, which provide valuable evidences for cropping management and allelopathy effects.
本研究比较了生长在沙质土壤（SSCY）、黄土土壤（LSCY）和第二年连作（CCCY）中的山药多糖的特征。SSCY 中总多糖（36.55%）和葡萄糖含量最高（80.19%），来自沙质土壤的 CCCY 获得了 24.55%的多糖和 43.66%的葡萄糖，而 LSCY 中总多糖含量为 27.54%，葡萄糖含量为 7.94%。结果表明，沙质土壤中的山药可能获得更高水平的葡萄糖。CCCY 将山药中的半乳糖醛酸从 7.03%增加到 26.19%，这可能是由于连续种植导致土壤 pH 值下降所致。SSCY 和 CCCY 来自沙质土壤的淀粉属于 C 型，而来自黄土土壤的 LSCY 的淀粉则具有 A 型模式。结果表明，两种土壤类型和连作改变了山药的化合物和含量，为种植管理和化感作用提供了有价值的证据。
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