Effect of foliar application of oligogalacturonides to tomato plant (Solanum Lycopersicum L.) in the phytoextraction of copper from contaminated soil
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Abstract
The oligogalacturonides mixture (Ogal), is a biostimulant obtained at National Institute of Agricultural Siences (INCA). This product has a high proportion of ionizable functional groups, which allows the formation of bonds with heavy metals. In this work, tomato seedlings with Ogal were sprinkled with 5, 19, 20, 30 mg L-1 concentrations, cultivated in an artificially contaminated soil, red ferralitic leachate type with 700 mg kg-1 copper (Cu). At 35 days of germination, were evaluations the total pseudo copper content in soil (mg kg-1), pH, as well as height (cm), root length (cm) and content of Cu (mg kg-1) in the different organs of the plant. The results showed that the height and length root of the plants grew in a contaminated environment without the application of product suffered a significant decrease in relation to the control; however, in which the product was applied, this decrease was not as marked as the previous ones, obtaining the best results when doses of 20 mg L-1 (dose 3 mL plant-1) were applied. On the other hand, the extraction of Cu ions by tomato plant increased with the presence of the Ogal, mixture being more phytoextraction when 20 mg L-1 (doses 3 mL plant-1) were applied.
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