Evaluation of basic physical and chemical properties of amylose extender mutants of rice for the presumption of the suitable utilizations [Japanese]

摘要

Basic physical and chemical properties were evaluated on amylose extender mutants of rice (ae mutants) in order to evaluate the presumption of the suitable utilizations. Ae mutants showed higher amylose content than the others. The chain length distribution of the debranched starches indicated that Fr. II/Fr, III ratio of ae mutants were much less than Koshihikari, and ae mutants had longer chain of amylopectin than that of Koshihikari. The tension strength of starch films of ae Mutants were stronger than that of Koshihikari and amylopectin, and apparently the films of ae mutants were paper-like by the tearing feel. Thus, the suitable utilizations of ae mutants were presumed to be materials with high strength, such as rice paper, rice noodle, sizing and biodegradable plastic films.