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<p>Bacterial cellulose is a sustainable substitute for synthetic polymers. In this study, 50 bacterial isolates from the soil rhizosphere of indigenous black rice plants were screened for cellulose production. Among these, <i>Enterobacter mori</i> R45 had the most potent ability in cellulose synthesis. White rice straw and black rice straw were investigated as substrates for bacterial cellulose production. A comparative assessment was performed between the standard media and the two modified media containing white rice and black rice straw hydrolysates. The culture parameters of the modified media were optimised using the Taguchi design. White rice straw media gave a maximum yield of 2.48&#xa0;g/L, followed by black rice straw media (0.93&#xa0;g/L), which were again higher than standard media, i.e. 0.54&#xa0;g/L. The higher cellulose yield in the white rice straw media was due to the absence of anthocyanin and the lower phenolic content than in black rice straw media. SEM images showed dense and compact crystalline cellulosic particles in the products of modified media. The FTIR spectra showed the characteristic functional groups of cellulose in all the samples. The crystallinity index (CI) of cellulose produced in standard HS medium was 91.62%, followed by 91.46% in white rice straw (WRS) medium and 88.03% in black rice straw (BRS) medium. The cellulose obtained using white rice straw hydrolysates in the medium was found to be the highest in terms of production yield and thermal stability. This medium could be a potential substrate for microbial cellulose production.</p> Graphical Abstract <p></p>

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Bacterial cellulose production from rice straw hydrolysates using Enterobacter mori R45 from rice plant soil

  • 期刊论文

  • 发表日期：

    2025年10月23日

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  • Khumballambam Roshibina Devi,
  • Keisham Niranjan Singh,
  • Amit Seth

摘要

Bacterial cellulose is a sustainable substitute for synthetic polymers. In this study, 50 bacterial isolates from the soil rhizosphere of indigenous black rice plants were screened for cellulose production. Among these, Enterobacter mori R45 had the most potent ability in cellulose synthesis. White rice straw and black rice straw were investigated as substrates for bacterial cellulose production. A comparative assessment was performed between the standard media and the two modified media containing white rice and black rice straw hydrolysates. The culture parameters of the modified media were optimised using the Taguchi design. White rice straw media gave a maximum yield of 2.48 g/L, followed by black rice straw media (0.93 g/L), which were again higher than standard media, i.e. 0.54 g/L. The higher cellulose yield in the white rice straw media was due to the absence of anthocyanin and the lower phenolic content than in black rice straw media. SEM images showed dense and compact crystalline cellulosic particles in the products of modified media. The FTIR spectra showed the characteristic functional groups of cellulose in all the samples. The crystallinity index (CI) of cellulose produced in standard HS medium was 91.62%, followed by 91.46% in white rice straw (WRS) medium and 88.03% in black rice straw (BRS) medium. The cellulose obtained using white rice straw hydrolysates in the medium was found to be the highest in terms of production yield and thermal stability. This medium could be a potential substrate for microbial cellulose production.

Graphical Abstract