College of Life Science, Capital Normal University, 100048 Beijing, China.
College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, China.
Carbohydr Polym. 2020 Apr 15;234:115905. doi: 10.1016/j.carbpol.2020.115905. Epub 2020 Jan 25.
This work investigated the effects of water-deficit and high-nitrogen (N) treatments on wheat resistant starch (RS) formation, molecular structure, and physicochemical properties. The results of consecutive 2-year field experiments revealed that water deficit significantly reduced starch granule number and diameter, amylose, RS content, RS particle size distribution, and physicochemical properties, including peak and trough viscosities, oil absorption capacity, and freeze-thaw stability. Water deficit also altered the long- and short-range structures of RS. In contrast, high-N fertilizer application significantly improved the RS content, long- and short-range structures, and physicochemical properties. Pearson correlation analysis revealed that RS content was positively correlated with total starch, amylose, rapidly digesting starch, 90 percentile of RS particle size, relative crystallinity, infrared 1047/1022 cm ratio, peak and breakdown viscosities, oil absorption capacity, and freeze-thaw stability, and was negatively correlated with slowly digestible starch content, 1022/995 cm ratio, and final viscosity.
本研究考察了水分亏缺和高氮（N）处理对小麦抗性淀粉（RS）形成、分子结构和理化特性的影响。连续两年田间试验的结果表明，水分亏缺显著降低了淀粉颗粒数量和直径、直链淀粉、RS 含量、RS 颗粒大小分布以及峰值和低谷黏度、吸油性和冻融稳定性等理化特性。水分亏缺还改变了 RS 的长程和短程结构。相比之下，高氮肥料的施用显著提高了 RS 含量、长程和短程结构以及理化特性。Pearson 相关性分析表明，RS 含量与总淀粉、直链淀粉、快速消化淀粉、RS 粒径的第 90 百分位、相对结晶度、红外 1047/1022cm 比值、峰值和崩解黏度、吸油性和冻融稳定性呈正相关，与缓慢消化淀粉含量、1022/995cm 比值和最终黏度呈负相关。
