Studies on starches of wild plants in Japan. Part 17. Starches from Asagi-zuisen(Freesia reflacta Klatt.), To-syobu(Gladiolus gandavensis Van Houtt.) and Dandoku(Canna indica Linn. var. orientalis Hook. f.).

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Starch samples were prepared from the underground tissues of the following: Asagi-zuisen, Freesia reflacta Klatt. (Iridaceae); To-syobu, Gladiolus gandavensis Van Houtt. (Iridaceae); and Dandoku, Canna indica Linn. var. orientalis Hook. f. (Cannaceae). Their yields were 24, 13, and 5%, respectively. These starches were examined as to granular size and shape, phosphorus and protein con-tents, the X-ray diffraction pattern, iodine coloration, swelling power, solubility, amylogram, the digestibility of the raw starches by glucoamvlase. and other nronerties. The starch of Asagi-zuisen was high in whiteness and slightly difficult to gelatinize or di-gest, and its granules appeared to be hard. Starch granules of To-syobu were fine and difficult to purify but similar to that of Asagi-zuisen in the properties relating to gelatinization. Dan-doku starch was composed of large flat granules and had the properties common to starches of the Zingiberaceae and Cannaceae showing high amylose and phosphorus contents and so on.
日本応用糖質科学会の論文