Impact of <i>Lentinus sajor-caju</i> on Lignocellulosic Biomass, In Vitro Rumen Digestibility and Antioxidant Properties of <i>Astragalus membranaceus</i> var. <i>mongholicus</i> Stems under Solid-State Fermentation Conditions

Abstract

Lentinus sajor-caju has shown potential for the bioconversion of lignocellulosic biomass in various substrates. Here, we evaluated whether L. sajor-caju affects the lignocellulosic biomass, in vitro fermentation and antioxidant properties of Astragalus membranaceus var. mongholicus (AMM) stems. The lignocellulosic biomass content and the antioxidant activity of AMM stems were determined by scanning electron microscopy, chemical component analysis, in vitro fermentation and LC-MS metabolomics after 30 days of fermentation by L. sajor-caju at 25 °C. L. sajor-caju significantly altered the rigid structure of the stems. Compared with the control condition, the lignocellulose contents were significantly reduced (p L. sajor-caju altered the composition of the cell wall of AMM stems, thereby enhancing their antioxidant activity.

Keywords

• <i>Astragalus membranaceus</i> stems
• <i>Lentinus sajor-caju</i>
• antioxidant activity
• lignin