In vitro Antibiosis of Chlorella vulgaris Extract against the Phytopathogen, Stenotrophomonas maltophilia

The aim of the current study was to evaluate antibacterial activity Chlorella vulgaris extracts against Stenotrophomonas maltophilia CSK1 isolated from a diseased cucumber fruit. To this end, water, methanol and ethanol were used separately as solvents extract active compounds dried vulgaris. S. identified using 16S rRNA gene sequencing at 99.93% identity level. bacterial strain confirmed by phylogenetic analyses. clearly clustered with reference strain, MTCC 434 (JALV01000036). antibiosis estimated agar well diffusion method. Unlike water ethanolic extracts, methanolic one exhibited an inhibition (zone 13.4 mm), indicating antimicrobial extract. No zone formed around that both no-observed effect growth CSK1. This can be attributed constituents in which may varies based on various factors including polarity solvent extraction process. inhibitory obtained fruit could open door for potential application such ingredient within bacteria future.