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. 2021 Mar 6;22:160. doi: 10.1186/s12864-021-07480-x

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 1 — Comparison of biomass, content, structural characteristics of polysaccharide between HEA and the mutated strains. a The mutagenic strains HEB and HEC from HEA identified by an antagonism test. b The biomass and polysaccharide content of H. erinaceus mycelia fermented by bred strains. Different letters indicated P < 0.01. c HPSEC-MALLS-RI chromatograms of 20% ethanol precipitated polysaccharides from H. erinaceus HEA and HEC. d The molecular weight distribution of differential polysaccharide X10-H3P20. e HPAEC of the monosaccharide composition of X10-H3P20. f Infrared spectrogram of H3P20 and X10-H3P20. Note:H1P20 represents the original strain HEA (0605) 20% ethanol precipitated polysaccharide fractions; H3P20 represents the ARTP mutagenic strain HEC (321) 20% ethanol precipitated polysaccharide fractions; X10-H3P20 represents the differential polysaccharide purified from H3P20