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, 90th percentile of RS particle size, relative crystallinity, infrared 1047/1022 cm-1 ratio, peak and breakdown viscosities, oil absorption capacity, and freeze-thaw stability, and was negatively correlated with slowly digestible starch content, 1022/995 cm-1 ratio, and final viscosity.

中文翻译：

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水分和高氮处理对小麦抗性淀粉晶体结构和理化特性的影响。

这项工作研究了缺水和高氮（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。连续两年的野外试验结果表明，水分亏缺显着降低了淀粉颗粒的数量和直径，直链淀粉，RS含量，RS粒径分布以及包括理化性质的物理和化学特性，包括峰和谷粘度，吸油能力和冻融稳定性。 。水分亏缺还改变了RS的长，短程结构。相比之下，高氮肥的施用显着改善了RS含量，长短程结构以及理化特性。Pearson相关分析显示，RS含量与总淀粉，直链淀粉，快速消化的淀粉，