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Bioconversion of bamboo shoot shells through the cultivation of the edible mushrooms Volvariella volvacea

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Abstract

Bamboo shoot shell (BSS), as agricultural waste, is mostly burned or discarded, causing serious environment pollution. In this study, the degradation and utilization of BSS by the edible fungus Volvariella Volvacea was investigated. The composition of V. volvacea fruit body was determined by HPLC-MS, GC-MS and ICP-OES. The activities of CMCase and xylanase were monitored by DNS (3,5-dinitrosalicylic acid) method. Laccase activity was assayed by the oxidation reaction of ABTS [2,2′-azinobis-(3-ethylbenzthiazoline-6-sulphonate)]. The degraded bamboo shoot shell powder was characterized by FTIR and SEM. The results showed that the mycelium of V. volvacea could degrade and utilize BSS for growth. The activities of carboxymethyl cellulase and laccase were increased during the cultivation. At the same time, the physical structure of the shell fiber becames porous and rough. Most of the products of decayed fibers contain alkanes, ethyl or methyl groups. Moreover, the biological efficiency (fruiting body yield) of V. volvacea cultivated on BSS was 1.52-fold higher than that of straw cultivation. The contents of total lipid, elaidic acid (C18:1n-9), total essential amino acids, total amino acids and iron in V. volvacea fruit bodies grown on BSS were 1.11, 1.66, 1.52, 1.60 and 1.30-fold higher than those of straw treatment, respectively. This study provides an effective method to solve the environmental pollution caused by BSS, and provides a new way for the potential utilization of BSS in edible fungi cultivation.

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Acknowledgements

We thank Dr. Aweya Jude Juventus and professor Yirui Wu for writing assistance.

Funding

This work was supported by the Key Project of Higher Education of Guangdong Province (2016KZDXM011), the Science and Technology Planning Project of Guangdong Province (2017A020217004), the Guangdong Rural Revitalization Strategy (2019ny005) and the Guangdong Basic and Applied Basic Research Foundation, P.R. China (2020A1515011333).

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All authors contributed to the study conception and design. Material preparation, data collection and analysis were performed by HL, ZH, YJ, JK, TP, MZ and ZH. The first draft of the manuscript was written by HL and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Mingqi Zhong or Zhong Hu.

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Li, H., He, Z., Jiang, Y. et al. Bioconversion of bamboo shoot shells through the cultivation of the edible mushrooms Volvariella volvacea. Ecotoxicology 30, 1476–1486 (2021). https://doi.org/10.1007/s10646-020-02281-6

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  • DOI: https://doi.org/10.1007/s10646-020-02281-6

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