Antifungal and antibacterial activity of some microalgae collected from lake "La Izvor" (Chisinau)

Abstract

Antibacterial and antifungal activity of 8 isolated microalgae strains from Lake "La Izvor" (Chisinau) was studied. Ethanolic biomass extracts were tested against five strains of pathogenic bacteria and fungi. Thus, according to the results of the experiments, the isolated strains of microalgae are able to synthesize metabolites that have antifungal and antibacterial activity against the tested phytopathogens. It should be noted that the obvious antibacterial activity showed the strains of Chlorella vulgaris, Oscillatoria planctonica and Spirulina major with the largest areas of inhibition of the growth of pathogenic bacteria Bacillus subtilis B-117, Xanthomonas campestris 8003b and Erwinia caratovora 8982.

The cyanobacteria Oscillatoria planctonica, Spirulina major and the microalga Chlorella vulgaris had a significant inhibitory effect on the growth of the pathogenic fungi Alternaria alternata, Aspergillus niger, Botrytis cinerea and Fusarium solani.