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Objective: To evaluate the effect of the synthetic C4-HSL and 3O-C12-HSL molecules produced by wild strains of P. aeruginosa as promoters of the root system of Solanum lycopersicum L in vitro.
Design/methodology/approach: Wild and control strains were studied, in which crude extraction in ethyl acetate and quantification of both molecules were performed. Different concentrations of synthetic 3O-C12-HSL and C4-HSL (10, 12, 24, 48, 96, and 192 μM) were used. The ability to elongate the primary root, as well as the length and density of root hairs under conditions were evaluated. Laboratory-controlled studies.
Results: The results obtained showed no beneficial effect on PAO1 in the crude extracts. However, a positive effect was observed when using the synthetic molecules 3O-C12-HSL and C4-HSL on primary root elongation at a concentration of 24 µM and on root hair density at a concentration of 96 µM, respectively, with a statistically significant difference (p <0.05) compared to the controls.
Findings/Conclusions: This study reports positive effects on primary root elongation and root hair density using the synthetic molecules C4-HSL and 3O-C12-HSL in S. lycopersicum.