Amylose and Amylopectin Unit-chain Distributions of Ginseng, Sanchi Ginseng, Pinellia Tuber, Alisma Rhizome and Coix Seed Starches

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  • ニンジン，サンシチニンジン，ハンゲ，タクシャ，ヨクイニン澱粉のアミロースとアミロペクチンの単位鎖長分布

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Amylose and amylopectin unit-chain distributions of starches from the roots of Panax ginseng C.A. Meyer (PG) and Panax notoginseng (Burk.) F.H. Chen (PN), tuber of Pinellia ternata (Thunb.) Breitenbach (PT), rhizome of Alisma orientale Juzepczuk (AO) and seed of Coix lacryma-jobi Linné var. ma-yuen Stapf (CL) were investigated by means of a gel filtration method. The amylose contents of the PG, PN, PT, AO and CL starches were 15.4-28.2, 25.9-35.7, 20.1-34.9, 26.6-35.2 and 17.2-26.4%, respectively. The ratios of subfractions (Fr. III/Fr. II) of amylopectin in PG, PN, PT and AO starches were 0.82±0.19, 0.93±0.13, 1.22±0.25 and 1.23±0.05, respectively. Those of CL starches were 0.97 and 3.49. The weight-average chain-lengths (CLw) of amylopectin in PG, PN, PT, AO and CL starches were 33-47, 28-35, 22-32, 25-28 and 23-38, respectively. It was confirmed that the ratio of subfractions (Fr. III/Fr. II) was negatively correlated with CLw. The weight-average degrees of polymerization (DPw) of amylose from PG, PN, PT and CL starches were 2720-3590, 3240-3730, 2390-2710 and 3090-3880, respectively.

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