Biofilms of nitrile-hydrolyzing bacteria: Dynamics of growth, resistance to toxic substances, and biotechnological potential

Monospecies and mixed bacterial biofilms of Rhodococcus ruber gt1, Pseudomonas fluorescens C2, Alcaligenes faecalis 2, and Rh. erythropolis 11-2 were obtained during growth in presence of the carriers. The transformation of aliphatic and aromatic nitriles by the biofilms of nitrile-hydrolyzing bacte...

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Published in:Applied biochemistry and microbiology 2016-12, Vol.52 (8), p.739-749
Main Authors: Maksimova, Yu. G., Maksimov, A. Yu, Demakov, V. A.
Format: Article
Language:English
Subjects:
Acrylonitrile
Alcaligenes
Alcaligenes faecalis
Bacteria
Biochemistry
Biofilms
Biology
Biomedical and Life Sciences
Biotechnology
Gene Engineering
Life Sciences
Medical Microbiology
Microbiology
Producers
Pseudomonas fluorescens
Resistance to control
Rhodococcus ruber
Selection
Toxic substances
Toxicity
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Summary:Monospecies and mixed bacterial biofilms of Rhodococcus ruber gt1, Pseudomonas fluorescens C2, Alcaligenes faecalis 2, and Rh. erythropolis 11-2 were obtained during growth in presence of the carriers. The transformation of aliphatic and aromatic nitriles by the biofilms of nitrile-hydrolyzing bacteria, as well as the growth dynamics of Rh. ruber gt1 and P. fluorescens C2 biofilms and their resistance to toxic substrates and products of nitrile hydrolysis, were studied. It was shown that the P. fluorescens C2 biofilm mass and total ATP content reached the maxima after 1 day of growth, whereas Rh. ruber gt1 reached them after 3–4 days of cultivation. The biofilms of Rh. ruber gt1 and P. fluorescens C2 were more resistant to the effects of high concentrations of acrylamide and acrylonitrile and had a greater adaptive capacity than planktonic cells.
ISSN:0003-6838
1608-3024
DOI:10.1134/S0003683816080068