Relation of Toxicity in Corn Seeds Treated with Zinc and Salicylic Acid |
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Authors: | Adão Felipe dos Santos Otoniel Magalhães Morais Renato de Mello Prado Aguinaldo José Freitas Leal Rouverson Pereira da Silva |
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Affiliation: | 1. Department of Agricultural Engineering, S?o Paulo State University, Jaboticabal, SP, Braziladaofeliped@gmail.com;3. Department of Plant and Animal Science, State University of Southwest Bahia, School of Agriculture, Vitoria da Conquista, Bahia, Brazil;4. Department of Soil and fertilizers, S?o Paulo State University, Jaboticabal, SP, Brazil;5. Department of Agronomy, Federal University of Triangulo Mineiro, Campus of Iturama, Iturama, MG, Brazil;6. Department of Agricultural Engineering, S?o Paulo State University, Jaboticabal, SP, Brazil |
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Abstract: | The beneficial effect of corn seed treatment with zinc (Zn) is directly related to the source used. The excess of this micronutrient causes seedling stress and reduces growth. Thus, assuming that the use of exogenous phytohormones can minimize such effects, we evaluated different doses and sources of Zn for the treatment of maize seeds with or without salicylic acid. The experiment took place in the laboratory, and two factorial experiments, 2 × 4 + 1, were performed in a randomized design. The seeds were treated with either ZnO or ZnSO4 at doses of 0.5, 1, 2, and 3 g.kg?1 seed with four replications, differing only by the addition of 4.14 mg L?1 salicylic acid. Treating seeds with Zn and salicylic acid did not affect germination. ZnO led to a greater increase in dry mass in corn seedlings as compared with zinc sulfate, especially at higher doses (2 and 3 g kg?1 seed). Seed treatment with sulfate reduces root and shoot length, and salicylic acid did not attenuate this toxic effect. Dry mass is not affected when oxide is used. Salicylic acid reduces the accumulation of zinc in the treatment of corn seeds, regardless of the source used. |
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Keywords: | Germination seedling micronutrient oxidative stress phytohormone zea mays |
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