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Zinc (Zn) is an important micronutrient in the metabolic processes of plants and animals, and its deficiency in humans can cause several physiological disorders. One way to increase the availability of this nutrient is through the biofortification technique. The waterleaf (Talinum triangulare (Jacq.) Willd) is a vegetable that has great potential for biofortification, since it is consumed and cultivated in several countries. Thus, the aim of this work is to analyze the benefits of zinc biofortification to the growth and development of T. triangulare seedlings. The experiment was carried out during the months of February to May of 201 9, at the Laboratory of Plant Physiology and Growth of the Federal University of Western Pará (UFOPA), in Santarém, state of Pará, Brazil. Six Zn concentrations were applied via soil: T1 - control; T2 - 1 2.5 mg kg -1; T3 - 25 mg kg -1; T4: - 50 mg kg-1; T5 - 1 00 mg kg -1; and T6 - 200 mg kg -1. The variables analyzed were: length, number of mature and new leaves, buds, dry leaf mass, stem, root, aerial and total part, in addition to the root/aerial part ratio, relative growth rate and zinc and manganese contents. The T6 provided na increase of 284% in zinc and a reduction of 23.97% in manganese compared to T1 . Growth and development variables were not significantly affected by different doses of Zn. The T5 and T6 proved to be the most suitable for the biofortification of the species, however additional studies are necessary. |
