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Development of Rhizophora mangle (Rhizophoraceae) and Avicennia schaueriana (Avicenniaceae) in the presence of a hydrocarbon-degrading bacterial consortium and marine diesel oil

Abstract

The development of Rhizophora mangle and Avicennia schaueriana seedlings impacted by marine diesel oil (MDO) was evaluated in the presence or absence of a hydrocarbon-degrading bacterial consortium (HBC). The bioassays were conducted in a greenhouse during 6 months and consisted of three different treatments (control, MDO only and MDO + HBC). The bacterial consortium was mainly composed of Bacillus spp. (73%), but Rhizobium spp., Pseudomonas spp., Ochrobactrum spp., and Brevundimonas spp. were also present. After 6 months, A. schaueriana seedlings showed higher mortality compared to those of R. mangle; R. mangle exhibited 68% (control), 44% (MDO alone) and 50% (MDO + HBC) seedlings survivorship compared to 42% (control), 0% (MDO alone) and 4% (MDO + HBC) for A. schaueriana. This variability may be due to differences in species physiology. Stem growth, diameter and number of leaves remained constant during the 6 months of the experiment with marine diesel oil and hydrocarbon-degrading bacterial consortium (MDO + BBC). For both mangrove species, bacterial enzymatic activity in the sediments was sufficient to maintain cell counts of 107 cells cm−3 in the rhizospheric soil and possibly synthetize the extracellular polymeric substances (EPS) that may emulsify and solubilize oil products.

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Data availability

Accession Number: All taxonomic sequence data have been deposited in the National Center for Biotechnology Information (GenBank) under BioProject ID SUB7449012.

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Acknowledgements

The authors would like to thank CAPES for fellowship grant support to the first author. We also thank Leandro Pereira Coutinho for help in laboratory analysis. This manuscript was greatly improved by the comments of the anonymous reviewers.

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The contribution of the authors is described below with their responsibility in the research. With the submission of this manuscript, I would like to undertake that all authors of this research paper have directly participated in the planning, execution, or analyses of this study. JAPB: contributed to the analysis, interpretation of the data and revising the manuscript for intellectual content. CCCW, GOAS, DCP: contributed to the design, conceptualization of the study and laboratory analyses. MCAC: contributed to the analysis, interpretation of the data and revising the manuscript for intellectual content.

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Correspondence to Luciana P. T. Chequer.

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Chequer, L.P.T., Bitencourt, J.A.P., Waite, C.C.C. et al. Development of Rhizophora mangle (Rhizophoraceae) and Avicennia schaueriana (Avicenniaceae) in the presence of a hydrocarbon-degrading bacterial consortium and marine diesel oil. 3 Biotech 12, 157 (2022). https://doi.org/10.1007/s13205-022-03212-4

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  • DOI: https://doi.org/10.1007/s13205-022-03212-4

Keywords

  • Bioremediation
  • Esterase enzyme
  • Dehydrogenase enzyme
  • Biofilm
  • Rhizospheric soil