Differential analysis of physicochemical properties and small molecule metabolites in glutinous and non-glutinous sorghum
2024
LI Jinyang, ZHAO Feifei, YU Zhifan, CHANG Xinya, GONG Shu, HAN Junru, XIA Jinyang, LI Zhe, LI Ling, ZHANG Jiwei, WANG Wenming
In this study, using 2 glutinous sorghum and 2 non-glutinous sorghum as research objects, and their differences in grain appearance color, peel thickness, starch structure and small molecule metabolites were analyzed and compared. The results showed that the grain of 2 glutinous sorghum was red, and the grain of 2 non-glutinous sorghum was white. The thickness of pericarp (pericarp layer and seed layer) of glutinous sorghum (49.35- 78.16 μm) was significantly higher than that of non-glutinous sorghum (33.39-49.03 μm) (P<0.05). The starch grains of glutinous sorghum were mainly oval-shaped and loosely arranged, while those in non-glutinous sorghum were irregular and tightly arranged. There were significant differences in the small molecule metabolites composition among different sorghum varieties. The marker metabolite of glutinous sorghum was catechin, while the marker metabolite of non-glutinous sorghum was 5-hydroxyindole-3-acetic acid. This study revealed significant differences in pericarp thickness, starch morphology, and small molecule metabolites between glutinous and non-glutinous sorghum, which was helpful to distinguish different sorghum varieties and lay a foundation for analyzing the relationship between liquor and grain.
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