Fine molecular structure and its effects on physicochemical properties of starches in potatoes grown in two locations

文献类型： 外文期刊

第一作者： Ahmed, Sulaiman

作者： Ahmed, Sulaiman;Ru, Weidong;Bao, Jinsong;Ahmed, Sulaiman;Ru, Weidong;Bao, Jinsong;Han, Huaxin;Cheng, Linrun;Bian, Xiaobo;Li, Guangcun;Jin, Liping;Wu, Peng

作者机构：

关键词： Potato starch; Physiochemical properties; Size-exclusion chromatography; Starch molecular structure; Chain length distribution; Growing location

期刊名称：FOOD HYDROCOLLOIDS （ 影响因子：9.147； 五年影响因子：9.169 ）

ISSN： 0268-005X

年卷期： 2019 年 97 卷

页码：

收录情况： SCI

摘要： Seven potato cultivars were planted at two different locations, E1 (Yiwu) and E2 (Jinhua) to assess the starch molecular structures and physicochemical properties as affected by growing locations. Most of the potato cultivars in E2 presented significantly smaller average whole molecular size ((R-h) over bar) whereas larger average chain length of amylopectin ((X) over bar) along with lower proportion of fa chains (DP 6-12) than those in E1. Significant varietal difference in the physicochemical properties were observed within each location, but only the mean onset temperature in E1 was significantly lower than that in E2. The fine structures (chain-length distribution) of both amylose and amylopectin affected the pasting properties of potato starches based on the starch structure-property correlations. The amylopectin fine structure also determined the thermal and retrogradation properties. Potato starches with more short chains and less long chains of amylopectin displayed lower gelatinization temperature but higher retrogradation.

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