Abstract

ZARATE-MARTINEZ, William et al. Effect of phenolic acids in tomato plants (Lycopersicon esculentum Mill.) inoculated with Clavibacter michiganensis. Rev. Mex. Cienc. Agríc [online]. 2018, vol.9, n.spe20, pp.4367-4379. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v0i20.1005.

In order to evaluate the effect of exogenous applications of phenolic acids in the tomato crop, four treatments were established: 1) an absolute control; 2) plants inoculated with Clavibacter michiganensis subsp. Michiganensis (Cmm); 3) plants inoculated with Clavibacter michiganensis subsp. michiganensis and with application of phenolic acids; and 4) plants only with application of phenolic acids. The applications were made with intervals of one week to accumulate a total of 10 applications during the crop cycle. The results indicate that the application of phenolic acids did not promote effects in the agronomic variables of the crop, however, if a significant decrease in severity of Cmm was observed. In addition, it was demonstrated that the application of phenolic acids modifies the density and stomatal index and in combination with biotic stress induces a smaller size of stomata. In the histological variables, it was found that with the application of phenolic acids the palisane palisade decreased its length, also induced a smaller number and area of xylem vessels in leaf and root respectively and a greater length of cortex in the root. The results showed that the application of phenolic acids can be a viable alternative for the control of Cmm.

Keywords : histological changes; stomata; incidence; severity.

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