Keywords
morphologic identification
molecular identification
antimicrobial activity
bioactive compounds
antifungal activity
How to Cite
Abstract
Cyanobacteria are photosynthetic microorganisms with significant biotechnological potential, given their capacity to produce a diverse array of bioactive compounds with antimicrobial, antiviral, antifungal, and anticancer properties. The present study evaluated the antimicrobial potential of cyanobacteria collected from Lake Camécuaro, Michoacán, Mexico. Isolation was performed by the serial dilution technique, and monoalgal cultures were obtained under the following conditions: room temperature, agitation at 102 rpm, and white light intensity ranging from 14,86 to 21,62 µmol m-2 s-1. For morphological identification, dichotomous keys were employed, while for molecular identification, a region of the gene coding for 16S rRNA was amplified and its sequence analyzed in silico. The cyanobacterium was identified as Gloeocapsopsis crepidinum (Thuret) Geitler ex Komárek 1993. Pure cultures were cultivated and methanolic extracts of the extracellular metabolites were obtained and evaluated for their antimicrobial activity against Escherichia coli PL20, Salmonella sp. and Fusarium oxysporum. The extracts demonstrated a statistically significant antimicrobial effect on E. coli, but not on Salmonella sp. or F. oxysporum.
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