Diversity of cultivable bacteria from deep-sea sediments of the Colombian Caribbean and their potential in bioremediation

Abstract

The diversity of deep-sea cultivable bacteria was studied in seven sediment samples of the Colombian Caribbean. Three hundred and fty two marine bacteria were isolated according to its distinct morphological character on the solid media, then DNA sequences of the 16S rRNA were ampli ed to identify the isolated strains. The identi ed bacterial were arranged in three phylogenetic groups, Firmicutes, Proteobacteria, and Actinobacteria, with 34 different OTUs de ned at ≥97% of similarity and 70 OTUs at ≥98.65%, being the 51% Firmicutes, 34% Proteobacteria and 15% Actinobacteria. Bacillus and Fictibacillus were the dominant genera in Firmicutes, Halomonas and Pseudomonas in Proteobacteria and Streptomyces and Micromonospora in Actinobacteria. In addition, the strains were tested for biosurfactants and lipases production, with 120 biosurfactant producing strains (mainly Firmicutes) and, 56 lipases producing strains (Proteobacteria). This report contributes to the understanding of the detailed physiology and the complex environmental processes associated with the marine deep-sea cultivable bacteria from the Colombian Caribbean.

Heavy Metal Tolerance of Microorganisms Isolated from Coastal Marine Sediments and Their Lead Removal Potential

“…Pseudomonadota has been described as the most common phylum in several sediment samples from marine environments [63,64]. Moreover, metagenomic analysis of sediment samples collected in the Colombian Caribbean region had also found Proteobacteria along with Bacteriodetes (Bacteroidota), Actinobacteria (Actinomycetota), and Firmicutes (Bacillota) as the dominant phyla, while Pseudomonas were the most common genera [78,79]. The genera Enterobacter and Stenotrophomonas have been documented in marine samples from around the world [63,80].…”

The Recent Advances in the Utility of Microbial Lipases: A Review

“…Several studies show that microorganisms that degrade hydrocarbons create lipolytic enzymes such as lipases. Blandon et al [ 154 ] identified 56 lipolytic enzyme-producing bacteria in the deep-sea sediments of the Colombian Caribbean and discussed their bioremediation potential [ 154 , 155 ].…”

Bioprospecting in food production: an approximation of the current state in Colombia

“…Three phylogenetic groups were found: Proteobacteria, Actinobacteria and Firmicutes. This information gives an estimation of the phylogenetic diversity and provides a first step to the creation of taxonomic inventories from existing microbial populations with bioremediation capacity (Blandón et al 2022).…”