228-4 Natural Variation of Selenium in Brazil Nuts and Soils from the Amazon Region.

See more from this Division: SSSA Division: Soils and Environmental Quality
See more from this Session: Impacts of Soil and Water Pollution on Food Safety Oral (includes student competition)

Tuesday, November 8, 2016: 10:20 AM
Phoenix Convention Center North, Room 228 B

Luiz-Roberto G Guilherme1, Ediu Carlos Silva Jr.2, Geila Santos Carvalho3, Lúcia Helena Oliveira Wadt4, Kátia Emídio Silva5, Roberval Monteiro Bezerra Lima5, Karine Dias Batista6, Marcelino Carneiro Guedes7, André Rodrigues Reis8, Guilherme Lopes9 and Teotonio Soares de Carvalho10, (1)Dept. Soil Science, Federal University of Lavras, Lavras, MG, BRAZIL
(2)Soil Science Department, Federal University of Lavras, Lavras, Brazil
(3)Federal University of Lavras, Lavras, Brazil
(4)Empresa Brasileira de Pesquisa Agropecuária, Porto Velho, Brazil
(5)Empresa Brasileira de Pesquisa Agropecuária, Manaus, Brazil
(6)Empresa Brasileira de Pesquisa Agropecuária, Boa Vista, Brazil
(7)Empresa Brasileira de Pesquisa Agropecuária, Macapá, Brazil
(8)Universidade Estadual Paulista, Tupã, Brazil
(9)Campus UFLA, CP 3037, Federal University of Lavras, Lavras, BRAZIL
(10)Dept. Soil Science, Federal University of Lavras, Lavras, Brazil
Abstract:
The Brazil nut tree (Bertholletia excelsa) is native of the Amazon rainforest. Brazil nuts are consumed worldwide and are known as the richest food source of selenium (Se). Yet, the reasoning for such Se contents is not well stablished. We evaluated genotypic variation on Se contents of Brazil nuts grown in different areas of the Brazilian Amazon, as well as soil Se contents in order to investigate if soil-Se is a major factor driving Se contents in nuts. Soil Se content (µg kg-1) varied from <65.8 to 1372.8 (average 283.0), whereas Se in nuts (mg kg-1) ranged from <0.55 to 362.29 (average 37.89). Selenium contents found in Brazil nuts were not correlated to soil-Se contents in the layers evaluated in the present study. Our results suggest that consumption of 1 single nut could provide 16 to 447% of the daily Se requirement for an adult. Further studies are needed to elucidate the factors underlying Se accumulation in Brazil nuts.

See more from this Division: SSSA Division: Soils and Environmental Quality
See more from this Session: Impacts of Soil and Water Pollution on Food Safety Oral (includes student competition)