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Updated: Apr 21, 2026

Analysis and Specification of Starch Granule Size Distributions
Published on: March 4, 2021
Chain length distribution and its effects on the pasting and thermal properties of lotus root starch
Chuan Tong1, Zhimin Yu1, Rubing Deng1
1College of Food Science and Technology, Zhejiang University of Technology, Hangzhou 310014, China.
Abstract:
This study investigated the variations in chain length distribution of six lotus root starch and relationships with starch functional properties. The amylose content (13.7-16.4%), peak degree of polymerization (DP) of amylose (XAM, 4,308-6,031), peak height of amylose (hAM, 0.141-0.172), second peak height of amylopectin (hAP2, 0.581-0.616), proportion of short amylose chain (SAM, 8.36-13.29%) showed significant genetic diversity. Amylopectin chain fractions fa (DP 6-12, 20.8-22.5%), fb1 (DP 13-24, 49.4-51.1%) and fb3 (DP ≥ 37, 13.7-15.3%) greatly varied among different lotus roots. Amylose content and hAM showed positive relations with onset temperature. DPs at the maximum of amylopectin peak and hAP2 were significantly correlated with pasting properties and gelatinization enthalpy. The SAM, fa and fa/fb1 ratio significantly correlated with peak viscosity, setback, pasting temperature and peak temperature. fb3 showed a positive relation with gelatinization enthalpy (P < 0.05). These results provided insights into the structure-function relationships of lotus root amylose and amylopectin.
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