Difference analysis of oligosaccharides in different varieties of Rehmannia glutinosa

Abstract

The oligosaccharide and monosaccharide contents of different varieties of Rehmannia glutinosa were compared to explore the difference in the oligosaccharide and monosaccharide contents in different varieties and to provide a scientific basis for formulation of product quality standards of Rehmannia glutinosa. The contents of fructose, glucose, sucrose, raffinose, and stachyose were determined via high-performance liquid chromatography. The total sugar content in the fresh Rehmannia glutinosa varieties in descending order was as follows: Beijing Tuodu 3 > Huaifeng > Jinjiu > Huaizhong 1 > Beijing 3. The total sugar content in the raw Rehmannia glutinosa varieties in descending order was as follows: Jinjiu > Huaifeng > Beijing Tuodu 3 > Beijing 3 > Huaizhong 1. The stachyose content was the highest among the five oligosaccharides. The total sugar content in the Beijing Tuodu 3 variety was the highest among the fresh Rehmannia glutinosa varieties, and the total sugar content in the Jinjiu variety was the highest among the raw Rehmannia glutinosa varieties. There were significant differences in the oligosaccharide and monosaccharide contents among the different varieties.