Characterization and development mechanism of Apios americana tuber starch.
Characterization and development mechanism of Apios americana tuber starch.
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DOI：
10.1016/j.carbpol.2016.05.062
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发表时间：
2016-10
影响因子：
11.2
通讯作者：
Hanyu Yangcheng;V. Belamkar;S. Cannon;J. Jane
中科院分区：
文献类型：
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作者：
Hanyu Yangcheng;V. Belamkar;S. Cannon;J. Jane
美洲蜜蜂是一种野生豆科植物，块茎可食。由于块茎具有优越的营养价值和健康益处，蜂蜜的驯化正在进行中。本研究的目的是：(1)表征块茎淀粉的理化性质；(2)了解母块茎(种子)和子块茎(子代)的淀粉结构和特性的差异以及淀粉发育的机制。母薯淀粉颗粒呈椭圆形、棒状或肾形，直径范围为1~30μm。母薯淀粉的结晶度较高，糊化热变较大，支链长度较长，糊化粘度较低。Apios2127的母薯淀粉有两个明显的糊化峰，这是由于块茎不同部位的淀粉颗粒具有不同的结构和性质。母块茎在块茎的外围比在块茎中心表现出更多的淀粉合成活性。
Apios americanais a wild legume-bearing plant with edible tubers. Domestication ofApiosis in progress because of the superior nutritional value and health benefits of the tuber. Objectives of this study were to: (1) characterize physicochemical properties of theApiostuber starch; and (2) understand differences in starch structures and properties between the mother (seed) and child (progeny) tubers and the mechanism of starch development. Granules of theApiostuber starch displayed ellipsoidal, rod, or kidney shape with diameter ranges of 1–30 μm. The mother tuber starches displayed greater percentage crystallinity, larger gelatinization enthalpy-changes, longer branch-chain lengths of amylopectin, and lower pasting viscosity than their counterpart child tuber starches. The mother tuber starch ofApios2127 displayed distinct two peaks of gelatinization, which were attributed to starch granules located at different regions of the tuber having different structures and properties. The mother tuber displayed more active starch biosynthesis in the periphery than in the center of the tuber.