Comparison Analysis of Bioactive Metabolites in Soybean, Pea, Mung Bean, and Common Beans and Reveal the Potential Variations of Their Antioxidant Property

Abstract

This study identified the significantly differences of basic nutrients and metabolite compounds in nine types of beans involved in soybean, mung bean, pea, and common bean. The metabolomics results showed that serval metabolites such as histidine, proline, 3-alanine, and myricetin which could be used to identify different beans. The different expressed metabolites among different types of beans were involved in various pathways including alanine, aspartate and glutamate metabolism, arginine and proline metabolism, and purine metabolism. The random forest model showed that amino acid and fatty acid could be used as special indexes to distinguish different types of beans in practice. The antioxidant activity was significantly different among different types of beans, and the contents of amino acid, coumarin, and polyphenol contributed the antioxidant activities of beans. Together, these results will provide a comprehensive understanding of metabolites in different types of beans and theoretical guideline for the future application of beans.

Keywords: Soybean, pea, mung bean, common bean, metabolite, antioxidant activity.