Interactive effects of arabinoxylan and β-glucan on inhibiting starch gelatinization and retrogradation via mimicking
Ruifeng Ying1, Shiqi Zeng1, Meigui Huang2
1National Key Laboratory for the Development and Utilization of Forest Food Resources, Nanjing Forestry University, Nanjing 210037, China; Department of Food Science and Technology, College of Light Industry and Food Engineering, Nanjing Forestry University, Nanjing 210037, China.
Abstract:
Arabinoxylan (AX) and (1,3)(1,4)-β-D-glucan (BG), as the main components of cereal grain cell wall polysaccharides, can effectively improve the processing characteristics of grain starch. To enhance starch processing properties, we constructed AX/BG-coated starch granules by simulating the architecture of cereal endosperms. Using rheology, thermal stability analysis, X-ray diffraction, spectroscopy, and low-field nuclear magnetic resonance, we investigated the interactive effects of AX and BG on starch gelatinization and retrogradation. At an AX/BG ratio of 1:1, optimal inhibition of starch gelatinization was observed, with solubility of 7.2 %, swelling power of 11.19 %, and amylose leaching value of 15.69 %. This ratio also preserved the thermal stability of the AX/BG-starch complex gel. At a 1:2 AX/BG ratio, the polysaccharides most effectively suppressed wheat starch retrogradation: after 7 days of storage, gel hardness increased by only 4.75 N and crystallinity increased by only 1.22 %.
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