Physicochemical Properties of Japanese Arrowhead (Sagittaria trifolia L, war. sinensis Makino) Starcht

Starch was separated from arrowhead corms . The starch contained a high level of amylose (25.6%) among the popular starches and 53 ppm of organic phosphorus, and showed Ca X-ray diffraction pattern. The d, p. n, and apparent d. p, distribution of amylose were 2840, 7080, and 570-21300, respectively. The c . 1. n of amylose and amylopectin were 420 and 20. 2, respectively. The onset gelatinization temperature measured by photopastegraphy was low at 49.5°C. The pasting properties of the starch by a Rapid Visco Analyzer were the most similar to those of sweet potato starch among some popular starches tested, but arrowhead starch showed a little lower pasting temperature and higher breakdown than sweet potato starch. The retrogradation tendency of the aqueous paste showed also similar to that of sweet potato starch.