Abstract

GARCIA ENCISO, Ema Laura et al. Effect of elicitors of natural origin on tomato plants subjected to biotic stress. Rev. Mex. Cienc. Agríc [online]. 2018, vol.9, n.spe20, pp.4212-4221. ISSN 2007-0934.  https://doi.org/10.29312/remexca.v0i20.991.

The elicitors are substances from various inorganic and organic sources that can induce physiological effects and changes such as the activation of defensive responses and the accumulation of phytoalexins in the organism to which they are applied, therefore, the objective of this investigation was to know the effect of the application of two elicitors of natural origin on the vigor of plants and the quality of tomato fruits in conditions of biotic stress caused by Fusarium oxysporum f. sp. lycopersici (FOL). Elicitors of natural origin (E1 and E2) were applied at 7, 15 and 56 ddt (days after transplantation); FOL inoculation was performed at 19 ddt, using a concentration of 1 × 106 spores mL-1. The vigor in the plants consisted of measuring: the incidence and severity of the disease, SPAD units, stomatal conductance during the development of the plants, height, total dry weight and yield; as well as the pH, soluble solids, firmness and vitamin C content in the fruits. The application of the elicitors decreased the severity of the symptoms of the disease. The elicitor E2 increased the height of the treated plants, the accumulation of biomass and avoided the reduction in yield, also decreased the content of soluble solids in the fruits. It is concluded that the application of elicitors of natural origin from plant extracts had a positive effect on the vigor of the tomato plants inoculated with FOL by increasing the height and accumulation of total biomass, in addition to that some quality variables were modified of the fruit.

Keywords : Fusarium oxysporum f. sp. lycopersici; fruit quality; systemic resistance in plants.

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