Abstract
Starch samples were prepared from the roots of Shakuyaku, Paeonia lactiflora Pall. (Ranunculaceae); Hama-bofu, Glehnia lzfttoralis Fr. Schm. (Umbelliferae); corm of Saji-omodaka, Alisma plantago-aquatica Linn. var. orientale Samuels . (Alismataceae); bulb of Baimo, Fritillaria verticillata Willd . var. thunbergii Baker (Liliaceae); and rhizome of Oni-dokoro, Dioscorea tokoro Makino (Dioscoreaceae), by the yields of 9%, 8%, 14%, 22%, and 11% of the fresh tissues, respectively. These starches were examined on granular size and shape, X-ray diffraction pattern, iodine coloration, swelling power, solubility, amylogram, digestibility of raw starches by glucoamylase, etc. and the characteristic features of them were described. Both starches of Shakuyaku and Hama-bofu were swelled and dissolved partially at 60°Cin water, and their viscosity curves stood up slantways on amylograms . Starch granules from Baimo were large in size, contained high amounts of amylose, and hardly dissolved in boiling water. Oni-dokoro starch had very characteristic granuler shapes that are thin flat disks with notched edges.
