title: In situ observation of crystallinity disruption patterns during starch gelatinization.
abstract: Twelve starches were isolated from the tuberous root of sweet potato, the rhizomes of lotus and yam, the tuber of potato, the corm of water chestnut, and the seeds of pea, bean, barley, wheat, lotus, water caltrop, and ginkgo. Their gelatinization processes were in situ viewed using a polarizing microscope in combination with a hot stage. Four patterns of crystallinity disruption during heating were proposed. The crystallinity disruption initially occurred on the proximal surface of the eccentric hilum, on the distal surface of the eccentric hilum, from the central hilum, or on the surface of the central hilum starch granule. The patterns of initial disruption on the distal surface of the eccentric hilum and on the surface of the central hilum starch were reported for the first time. The heterogeneous distribution of amylose in starch granule might partly explain the different patterns of crystallinity disruption and swelling during gelatinization.
authors.affiliation: Key Laboratories of Crop Genetics and Physiology of the Jiangsu Province and Plant Functional Genomics of the Ministry of Education, Yangzhou University, Yangzhou 225009, China.
authors.forename: Canhui
authors.initials: C
authors.lastname: Cai
authors.forename: Cunxu
authors.initials: C
authors.lastname: Wei
mesh_terms: D000688:Amylose / Q000737:chemistry; D003459:Crystallins; D003460:Crystallization; D005780:Gelatin / Q000737:chemistry; D005782:Gels / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry; D027343:Rhizome / Q000737:chemistry; D013213:Starch / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D003459:Crystallins; D005782:Gels; D005780:Gelatin; D013213:Starch; D000688:Amylose