Physicochemical Properties of Euryale ferox Kernel Starches from Two Different Regions

摘要

The starchy kernel of Euryale ferox seed has attracted much attention because of its edible and medicinal values. In this article, physicochemical properties of E. ferox kernel starches were investigated from two different regions. Dry kernel contained about 70% starch. The starch was polyhedral in shape, had very small size of about 1~2 μm in diameter, and exhibited A-type crystallinity. The native starches of kernels from two different regions showed similar amylose content, molecular weight distribution, relative crystallinity, short-range ordered structure, swelling power, and digestion properties. The kernel starch from Weishan Lake had higher gelatinization temperature, enthalpy, and water solubility, contained higher resistant starch in gelatinized and retrograded starch, and showed higher resistant ability to acid and amylase hydrolysis than that from Shaobo Lake. These above results could help in promoting the use of E. ferox kernel as an alternative starchy source.