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. 2023 Apr 3;205(4):160.
doi: 10.1007/s00203-023-03496-x.

Dye degradation by early colonizing marine bacteria from the Arabian Sea, India

Madhav Kumar  1   2 , Alka Kumari  1 , Bansari P Vaghani  3 , Doongar R Chaudhary  4   5
Affiliations

Dye degradation by early colonizing marine bacteria from the Arabian Sea, India

Madhav Kumar et al. Arch Microbiol. .

Abstract

Malachite green dye belongs to the triphenylmethane group and is a common environmental pollutant that threatens non-target organisms. We report the potential of the early colonizing marine bacterium Pseudomonas sp. ESPS40 isolated from the Arabian Sea, India, to decolorize malachite green (MG). The bacterium ESPS40 exhibited a higher ability for MG degradation (86-88%) at varying NaCl concentrations (1-3%). The highest MG degradation (~ 88%) was observed at 1% NaCl. The bacterial strain ESPS40 showed degradation up to 800 mg L-1 MG. Further, enzyme activities such as tyrosinase (63.48-526.52 U L-1) and laccase (3.62-28.20 U L-1) were also analyzed with varying concentrations (100 mg L-1-1000 mg L-1) of MG during the degradation process. The dye degradation was confirmed by Fourier transform infrared spectroscopy (FTIR) and high-performance liquid chromatography (HPLC). The outcome of the present study demonstrated Pseudomonas sp. ESPS40 as a potential strain for the efficient degradation of MG at higher concentrations. Thus, Pseudomonas sp. ESPS40 can be utilized as a potential candidate for the biodegradation of MG in wastewater treatment.

Keywords: Dye degradation; Early colonizers; Malachite green; Marine bacteria; Pseudomonas sp..

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