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Immobilization pattern of morphologically different microorganisms on bacterial cellulose membranes

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Abstract

The aim of this study was to assess the immobilization pattern of microorganisms characterized by varying cell shapes and sizes (rod-shaped bacteria Lactobacillus delbruecki, spherical-shaped yeast Saccharomyces cerevisiae and hyphae forms of Yarrowia lipolytica) on bacterial cellulose of various material properties. The ‘adsorption-incubation’ method was used for the purposes of immobilization. The immobilization pattern included adsorption efficiency, ability of the immobilized cells to multiply within the carrier expressed as incubation efficiency and the degree of release of the immobilized cells from the carrier. The efficiency of adsorption and incubation was affected by the morphology of the immobilized cells and increased together with cellulose surface area. For smaller bacterial cells a higher level of loading was obtained on the same surface as compared to larger yeast cells. During incubation, the number of immobilized bacterial and yeast cells increased significantly in comparison to the number of cells adsorbed on the carrier during the adsorption step. Despite the morphological differences between the S. cerevisiae and Y. lipolytica cells, there were no statistically significant differences in the efficiency of adsorption and incubation. It was also revealed that the release ratio values obtained for L. delbruecki and S. cerevisiae increased along with cellulose surface area. Interestingly, Y. lipolytica cells in the pseudohyphae and hyphae forms penetrated deeply into the three-dimensional network of BC nanofibrils which prevented subsequent cell release. It was confirmed that carrier selection must be individually matched to the type of immobilized cells based especially on its porosity-related parameters.

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Acknowledgements

The authors would like to thank the Dean of the Faculty of Biotechnology and Animal Husbandry (Grant No. 517-01-027-3323/17) and the National Centre for Research and Development in Poland (Grant No. LIDER/011/221/L-5/13/NCBR/2014) for providing financial support to this work.

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Correspondence to Karol Fijałkowski.

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Żywicka, A., Wenelska, K., Junka, A. et al. Immobilization pattern of morphologically different microorganisms on bacterial cellulose membranes. World J Microbiol Biotechnol 35, 11 (2019). https://doi.org/10.1007/s11274-018-2584-7

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  • DOI: https://doi.org/10.1007/s11274-018-2584-7

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