Abstract
Physicochemical and structural properties of starch can be impacted by nonstarch polysaccharides. The effect of Mesona chinensis Benth. polysaccharide (MCP) on the physicochemical and digestion properties of debranched waxy maize starch (DWMS) was investigated. The results showed that low concentrations of MCP (0.5 and 1 mg/g) can facilitate the aggregation of DWMS compared with high concentrations (2 and 4 mg/g). All DWMS with or without MCP showed a B-type crystalline structure, which was remarkably different from the A-type of native waxy maize starch. The interaction force between MCP and DWMS was a noncovalent bond, and the relative crystallinity and resistant starch (RS) content of DWMS increased when a low level of MCP (0.5 and 1 mg/g) was added. This study showed that MCP (0.5 and 1 mg/g) can effectively increase the content of RS of debranched starch and decrease the digestibility of debranched starch.
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