Structure and properties of waxy-rice (IR29) starch during development of the grain

✍ Scribed by Gurunathan Murugesan; Susumu Hizukuri; Masako Fukuda; Bienvenido O. Juliano

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 464 KB
• Volume: 223
• Category: Article
• ISSN: 0008-6215
• DOI: 10.1016/0008-6215(92)80020-2

✦ Synopsis

The structure and properties of a waxy-rice (IR29) starch were analysed at 7, 11, 15, and 30 days after flowering (DAF) . The iodine affinity, blue value, and A ., of the iodine-stained solutions of the starches and their isoamylolysates, the beta-amylolysis limits, and the limiting viscosity number of the starches were largely constant during development of the grain . The number-average chain length and chain-length distribution were not significantly different . Starch granules, both spherical and polygonal, were smaller at 7 DAF than in the later stages, as revealed by scanning electron microscopy. These data suggest that only complete molecules are packed into the granules .