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Mapping and chemical speciation of soybean seeds and seedlings treated with nickel sources

Grant number: 19/04585-0
Support type:Scholarships abroad - Research Internship - Master's degree
Effective date (Start): August 01, 2019
Effective date (End): January 31, 2020
Field of knowledge:Agronomical Sciences - Agronomy - Soil Science
Principal Investigator:José Lavres Junior
Grantee:Jessica Bezerra de Oliveira
Supervisor abroad: Antony Van Der Ent
Home Institution: Centro de Energia Nuclear na Agricultura (CENA). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Local de pesquisa : University of Queensland, Brisbane (UQ), Australia  
Associated to the scholarship:18/13738-1 - Soybean seed treatment with micro and nanofertilizer based on nickel hydroxide and nickel sulfate: evaluation of the BNF efficiency and plant growth, BP.MS

Abstract

The potential use of nanoparticles (NPs) as a nutrient for seed treatment has been bringing much interest in the scientific community. The use of NPs in agriculture is promising, but there is a lack of information about their interaction with plants as well as its potential to boost plant growth and yield. Seed treatment with cobalt, molybdenum Bradyrhizobium strains, and nickel (Ni) has been practiced to improve crops. The objective of this study will evaluate the effect of soybean seed and seedlings treatment with Ni sources: (1) Ni hydroxide - Ni(OH)2 - dimension micrometric (5µm); (2): Ni sulphate - NiSO4; and (3): Ni hydroxide - Ni(OH)2 - dimension nanometric (5nm), both at rate of 360 mg kg-1 (detectable limit of the equipment) on the Ni-absorption by plants, shoot-to-roots Ni-translocation and its distribution on plant tissues. The distribution and chemical speciation of Ni supplied to seeds and seedlings will be assayed by micro-X-ray fluorescence (µ-XRF) and micro-X-ray absorption near-edge structure (µ-XANES). All seeds treated and further germinated will be analyzed in rizoboxes during the VE and V1 phenological stages, focusing also in the roots, soil-rhizosphere, and shoots (only V1). The major motivation for this sort of physic-chemical analysis on plants subjected to NP, is required for further development of Ni-based new fertilizers, in order to either decrease the total amount applied in the soil or augmenting nutrient use efficiency, thus reducing possible constraints to the environment and human health and improving agronomic yield with lower cost to farmers. Keywords: nanoparticles, X-ray absorption and Glycine max.