目的：探讨冷冻贮苗降低当归早薹率的生理机制。方法：研究不同来源及大小当归种苗-10℃处理前后根部可溶性糖、可溶性蛋白、丙二醛含量变化。结果：种苗越大，可溶性糖含量越高、蛋白质含量越低、丙二醛含量越高；相同级别不同来源的当归种苗之间可溶性糖、可溶性蛋白、丙二醛含量无明显差异。-10℃冷冻处理后，同一级别的当归种苗可溶性糖、可溶性蛋白含量较处理前有所降低，丙二醛含量较处理前有所升高。结论：低温处理前后相同来源的当归种苗，可溶性糖、可溶性蛋白、丙二醛含量与种苗大小显著相关。

This article was aimed to study the physiological mechanisms in frozen storage to reduce early bolting of Angelica sinensis. By analyzing the root soluble sugar, soluble protein, MDA content changes before and after -10℃ processing of the Angelica sinensis seedlings of different size from different sources, the physiological mechanisms in frozen storage reducing early bolting of A . sinensis had been studied. The results indicated that the greater seedlings, the higher content of soluble sugar, lower protein content and higher MDA. There were no obvious differences on the soluble sugar, soluble protein and MDA content of the same size seedlings from different sources. After -10℃ freezing, the content of soluble sugar and protein in the seedlings with the same size were decreased. Meanwhile, the content of MDA was increased. It was concluded that the content of soluble sugar, soluble protein and MDA were obviously related to the size of Angelica sinensis seedlings from the same source before and after low temperature process.

科学技术部国家“十二五”科技支撑计划项目（2011BAI05B02）：当归规范化种植基地优化升级及系列产品综合开发研究，负责人：李应东；甘肃省农牧厅农业科技创新项目（GNCX-2011-38）：低温贮藏种苗抑制当归早期抽薹技术研究及推广应用，负责人：杜弢。