Dense and continuous networks of aerial hyphae improve flexibility and shape retention of mycelium composite in the wet state

The mycelium composites composed of fungal and plant substrate are a practical alternative to petroleum plastic-based foam materials. However, the effects physiological traits fungus on composites’ microscopic structure mechanical properties remain poorly understood. Here, we compared two basidiomycetes with distinct morphology white-decay modes. Cross-sectional observation revealed that possess core/shell shell formed dense aerial core particles spongy mycelium. Dense continuous networks provided by Trametes hirsuta strengthen composite coarse Pleurotus ostreatus. In particular, firm mycelial skeleton confers high flexibility shape-retention in wet state. This unique characteristic indicates its potentials new industrial applications.