Efeitos do Fe e Zn no crescimento, bioforticação e qualidade de alface cultivado em hidroponia

Vitor Borges da Silva; Laura Matos Ribera; Maria José Yañez Medelo; Hilário Júnior de Almeida; Arthur Bernardes Cecilio Filho

doi:10.1590/1983-21252024v3712187rc

Authors

Vitor Borges da Silva Department of Plant Production, Universidade Estadual Paulista 'Júlio de Mesquita Filho', Jaboticabal, SP, Brazil https://orcid.org/0000-0002-7782-1937
Laura Matos Ribera Department of Plant Production, Universidade Estadual Paulista 'Júlio de Mesquita Filho', Jaboticabal, SP, Brazil https://orcid.org/0000-0003-1570-7714
Maria José Yañez Medelo Department of Plant Production, Universidade Estadual Paulista 'Júlio de Mesquita Filho', Jaboticabal, SP, Brazil https://orcid.org/0000-0001-8564-5358
Hilário Júnior de Almeida Department of Plant Production, Universidade Estadual Paulista 'Júlio de Mesquita Filho', Jaboticabal, SP, Brazil https://orcid.org/0000-0002-7186-846X
Arthur Bernardes Cecilio Filho Department of Plant Production, Universidade Estadual Paulista 'Júlio de Mesquita Filho', Jaboticabal, SP, Brazil https://orcid.org/0000-0002-6706-5496

DOI:

https://doi.org/10.1590/1983-21252024v3712187rc

Keywords:

Biofortified food. Soilless cultivation. Nutrient deficiency. Hidden hunger. Lactuca sativa L.

Abstract

Iron (Fe) and zinc (Zn) are essential elements for human health and their deficiencies cause reduced work capacity, physiological and immune system disorders, anemia and even death, being considered primary global public health problems. Agronomic biofortification aims to increase the concentration of these nutrients in the edible part of the plant and, consequently, increase human intake of these nutrients. The aim of this study was to evaluate the effects of Fe and Zn concentrations on the growth, biofortification and quality of lettuce grown in hydroponics. Six treatments corresponding to the combinations of Zn (0.06 and 0.24 mg L^-1) and Fe (2, 4 and 8 mg L^-1) concentrations were evaluated. Increase of Zn in the nutrient solution positively influenced only leaf Zn contents at 18 days after transplanting the seedlings and ascorbic acid at harvest. On the other hand, the increase in Fe concentration positively influenced the contents of photosynthetic pigments, ascorbic acid and Fe; however, it negatively affected the leaf Zn content, leaf area and leaf dry mass of lettuce. Greater biofortification of lettuce for Fe was observed with the Fe concentration of 8 mg L^-1 in the solution.

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