title: Morphology, structure and gelatinization properties of heterogeneous starch granules from high-amylose maize.
abstract: High-amylose cereal endosperm is rich in heterogeneous starch granules. In this paper, we investigated the morphology, structure and gelatinization properties of high-amylose maize endosperm starch. Starch had individual, aggregate and elongated heterogeneous granules. Most of individual granules were round with small size and had one central hilum. Aggregate and elongated granules consisted of many subgranules with central hila, and had irregular and rod/filamentous shapes, respectively. Iodine stained starch granules showed five types of polarization colors: blue, purple, fuchsia, dark red, and interior dark blue and exterior brown. Most of individual and aggregate granules had the color of dark red, that of elongated granules the color of interior dark blue and exterior brown. Amylose was mainly distributed in the hilum region and the circumference of starch granules. Aggregate and elongated granules had higher amylose content than individual granules. Elongated and individual granules had the highest and the lowest gelatinization resistance among high-amylose maize heterogeneous starch granules, respectively.
authors: 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: Canhui
authors: C
authors: Cai
authors: 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: Lingxiao
authors: L
authors: Zhao
authors: 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: Jun
authors: J
authors: Huang
authors: Testing Center, Yangzhou University, Yangzhou 225009, China.
authors: Yifang
authors: Y
authors: Chen
authors: 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. Electronic address: cxwei@yzu.edu.cn.
authors: Cunxu
authors: C
authors: Wei
mesh_terms: D000688:Amylose / Q000032:analysis*; D005780:Gelatin / Q000737:chemistry*; D018613:Microscopy, Confocal; D008855:Microscopy, Electron, Scanning; D013213:Starch / Q000737:chemistry*; D003313:Zea mays / Q000737:chemistry*
chemical_list: D005780:Gelatin; D013213:Starch; D000688:Amylose
keywords: Gelatinization property; Heterogeneous starch granules; High-amylose maize; Morphology; Structure