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<p>To expand the raw material range for <i>Ganoderma lingzhi</i> production, this study explored the feasibility of maize stalk (MS) as a sawdust substitute and clarified the mechanism of MS utilization by <i>G. lingzhi</i>. 6 groups of culture substrates with different MS proportions were designed for <i>G. lingzhi</i> cultivation. The optimal formula was screened by analyzing agronomic traits, main bioactive substance contents, and targeted amino acid metabolic profiles. Lignocellulose content and enzyme activity at different growth stages of <i>G. lingzhi</i> were detected to investigate substrate utilization patterns. Results showed that the Y1 formula (60.8% sawdust + 15.2% MS) exhibited significantly superior agronomic traits and higher triterpene/sterol contents compared to other formulations, with the highest EAA/(EAA + NEAA) and EAA/NEAA ratios. <i>G. lingzhi</i> primarily consumes and utilizes cellulose; excessive MS addition reduced lignin and cellulose contents, leading to decreased cellulase activity and ultimately lower yields. Thus, an appropriate amount of MS can replace traditional sawdust substrates, and this study provides data support for the development of MS-based culture media for <i>G. lingzhi</i>.</p> Graphical Abstract <p></p>

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Enhancing Resource Efficiency: Utilizing Maize Stalk in Ganoderma lingzhi Substrates: Formula Optimization and Degradation Mechanism

  • 期刊论文

  • 发表日期：

    2026年1月20日

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  • Jintao Li,
  • Shufang Wang,
  • Yingjie Liu,
  • Qianqi Ye,
  • Meixia Yan

摘要

To expand the raw material range for Ganoderma lingzhi production, this study explored the feasibility of maize stalk (MS) as a sawdust substitute and clarified the mechanism of MS utilization by G. lingzhi. 6 groups of culture substrates with different MS proportions were designed for G. lingzhi cultivation. The optimal formula was screened by analyzing agronomic traits, main bioactive substance contents, and targeted amino acid metabolic profiles. Lignocellulose content and enzyme activity at different growth stages of G. lingzhi were detected to investigate substrate utilization patterns. Results showed that the Y1 formula (60.8% sawdust + 15.2% MS) exhibited significantly superior agronomic traits and higher triterpene/sterol contents compared to other formulations, with the highest EAA/(EAA + NEAA) and EAA/NEAA ratios. G. lingzhi primarily consumes and utilizes cellulose; excessive MS addition reduced lignin and cellulose contents, leading to decreased cellulase activity and ultimately lower yields. Thus, an appropriate amount of MS can replace traditional sawdust substrates, and this study provides data support for the development of MS-based culture media for G. lingzhi.

Graphical Abstract