Novel research on nanocellulose production by a marine Bacillus velezensis strain SMR: a comparative study

Bacterial nanocellulose (BNC) is a nanofibrillar polymer that possesses unique characteristics such as high chemical purity, mechanical strength, flexibility, and absorbency. In addition, different bacterial strains can form nanocellulose (NC) in multiple shapes and sizes. This study describes the f...

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Bibliographic Details
Published in:	Scientific reports Vol. 10; no. 1; p. 14202
Main Authors:	Abouelkheir, Samia S., Kamara, Marwa S., Atia, Salma M., Amer, Sara A., Youssef, Marina I., Abdelkawy, Rana S., Khattab, Sherine N., Sabry, Soraya A.
Format:	Journal Article
Language:	English
Published:	London Nature Publishing Group UK 26-08-2020 Nature Publishing Group
Subjects:	631/326 631/61 Algae Bacillus - metabolism Biomass Cellulose - biosynthesis Cellulose - chemistry Cellulose - ultrastructure Comparative studies Growth media Humanities and Social Sciences Hydrogels Industrial wastes Mechanical properties Microscopic analysis multidisciplinary Nanofibers - chemistry Nanofibers - ultrastructure Polymers Polyvinyl Alcohol rRNA 16S Scanning electron microscopy Science Science (multidisciplinary) Seaweeds Spectroscopy, Fourier Transform Infrared Thermogravimetry Ulva Waste materials X-Ray Diffraction
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Summary:	Bacterial nanocellulose (BNC) is a nanofibrillar polymer that possesses unique characteristics such as high chemical purity, mechanical strength, flexibility, and absorbency. In addition, different bacterial strains can form nanocellulose (NC) in multiple shapes and sizes. This study describes the first report of a marine Bacillus strain that is able to synthesize NC. The strain identified as B. velezensis SMR based on 16S rDNA sequencing, produced highly structured NC, as confirmed by X-ray diffraction (XRD) and Scanning Electron Microscopic Analysis (SEM). In Hestrin-Schramm (HS) medium, B. velezensis SMR produced twice the quantity of BNC in comparison to the reference strain, G. xylinus ATCC 10245. The ability of B. velezensis SMR to produce NC using different industrial waste materials as growth media was tested. Growth in Ulva seaweed extract supported a 2.5-fold increase of NC production by B. velezensis SMR and a threefold increase in NC production by G. xylinus ATCC 10245. As proof of principle for the usability of NC from B. velezensis SMR, we successfully fabricated a BNC-based polyvinyl alcohol hydrogel (BNC-PVA) system, a promising material used in different fields of application such as medicine, food, and agriculture.
ISSN:	2045-2322 2045-2322
DOI:	10.1038/s41598-020-70857-7