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Insights into the structural and physicochemical properties of small granular starches from two hydrophyte duckweeds, Spirodela oligorrhiza and Lemna minor

Author:
Chen, Lei, Yu, Changjiang, Ma, Yubin, Xu, Hua, Wang, Shumin, Wang, Yu, Liu, Xingxun, Zhou, Gongke
Source:
Carbohydrate research 2016 v.435 pp. 208-214
ISSN:
0008-6215
Subject:
Lemna minor, Spirodela oligorrhiza, X-ray diffraction, amylose, aquatic plants, dietary supplements, functional foods, gelatinization, physicochemical properties
Abstract:
The structure and physicochemical properties of starches from two hydrophyte duckweeds, Spirodela oligorrhiza and Lemna minor, were investigated and compared in this study. The amylose content and average size of starches were determined to be 20.85%, 4.70 μm and 27.77%, 6.17 μm for Spirodela oligorrhiza and Lemna minor, respectively. The average chain length of two duckweed starches was measured to be around DP 28. The chain length distribution was observed to be greatly different from other reported starches for the high proportion of long chains (DP ≥ 37) over 50%. Wide-angle X-ray diffraction profiles of the two starch samples displayed typical B-type diffraction pattern. The gelatinization enthalpy-changes (ΔHgel) of two starch samples was about 10.40 J/g for two duckweed starches. The present results suggested the potential utilization of small granular starches from duckweed in functional foods and dietary supplement products.
Agid:
5564001