BIOACTIVITY OF NATURAL PHENOLIC COMPOUNDS AGAINST STRAINS OF PSEUDOMONAS SYRINGAE ISOLATED FROM SOYBEAN

DAMBOLENA JS; ARCHILLA MV; ZYGADLO JA; MADARIAGA LG; MERLO C; ZAIO Y; OLIVA MM

La Falda

Congreso; XXI Annual Scientific Meeting-Sociedad de Biología de Córdoba; 2017

Pseudomonas syringae is one of the main causal agent of plant bacterial diseases. The objective was to evaluate the antibacterial activity of natural phenolic compounds against Pseudomonas syringae isolated from soybean. Four phytopathogenic strains of Pseudomonas syringae (Q, LS3, EM1 and LSC13) isolated from soybean plants of Cordoba province were used, which were provided from the Departament of Microbiología e Inmunología of the Fac de Cs Exactas, Fco-Qcas y Naturales (UNRC). It was evaluated the minimum inhibitory concentration (MIC) and the minimum bactericidal concentration (MBC) of 11 phenolic compounds (carvacrol, thymol, isoeugenol, eugenol, vinillin, o-cresol, p-cresol, m-cresol, estragole, guaiacol and phenol). Carvacrol and thymol showed the highest bioactivity against the 4 strains evaluated. The thymol MIC average was 0.23mM and that of carvacrol 0.13mM, while the MBC value for thymol was 0.27mM and for carvacrol 0.22mM. The compounds with the lowest antibacterial activity were phenol, guaiacol and vainillin. All strains presented similar sensitivity to the evaluated compounds, which indicate their potential use as alternative to protect crops from bacterial infections.