Comparing soil-to-plant cadmium (Cd) transfer and potential human intake among rice cultivars with different Cd tolerance levels grown in a tropical contaminated soil

Author(s):Show less -

Nogueira, Thiago Assis Rodrigues ^{[1, 2]} ; Muraoka, Takashi ^[3] ; Silveira, Lais Karina ^[3] ; da Silva, Jamile Santos ^[4] ; Abreu-Junior, Cassio Hamilton ^[3] ; Lavres, Jose ^[3] ; Martinelli, Adriana Pinheiro ^[3] ; Teixeira Filho, Marcelo Carvalho Minhoto ^[1] ; He, Zhenli ^[5] ; Jani, Arun Dilipkumar ^[6] ; Ganga, Antonio ^[7] ; Capra, Gian Franco ^{[7, 8]}

Affiliation

^[1] Sao Paulo State Univ, Dept Plant Protect Rural Engn & Soils, Sch Engn, BR-15385000 Ilha Solteira - Brazil

^[2] Sao Paulo State Univ, Sch Agr & Vet Sci, Via Acesso Prof Paulo Donato Castellane S-N, BR-14884900 Jaboticabal, SP - Brazil

^[3] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13416000 Piracicaba, SP - Brazil

^[4] Fed Inst Sao Paulo, BR-13400970 Avare, SP - Brazil

^[5] Univ Florida, Inst Food & Agr Sci, Indian River Res & Educ Ctr, Ft Pierce, FL 34945 - USA

^[6] Calif State Univ, Dept Biol & Chem, Monterey, CA 93933 - USA

^[7] Univ Sassari, Dipartimento Architettura Design & Urbanist, I-07100 Polo Bionaturalistico - Italy

^[8] Univ Sassari, Desertificat Res Ctr, I-07100 Sassari - Italy

• Document type: Journal article
• Source: ENVIRONMENTAL MONITORING AND ASSESSMENT; v. 194, n. 1 JAN 2022.
• Web of Science Citations: 0

Abstract

With its accumulation in upland rice, cadmium (Cd) can easily enter the human food chain, which poses a global health threat considering nearly half of the human population depends on rice as a staple food source. A study was conducted to (1) evaluate Cd accumulation by rice cultivars, grown in Cd-polluted Tropical Oxisols, with different levels of Cd tolerance; (2) quantify Cd transfer from soil to rice shoots and grain; and (3) estimate daily Cd intake by humans. Three rice cultivars, characterized by low (Cateto Seda-CS), medium (BRSMG Talento-BT), and high (BRSMG Caravera-BC) Cd uptake capacity, were investigated. Rice cultivars were exposed to increasing soil Cd concentrations (0.0, 0.7, 1.3, 3.9, 7.8, and 11.7 mg kg(-1)). Analysis was performed on soil, shoots, and grain. Shoot biomass and grain yield decreased with increasing Cd supply, suggesting the following Cd tolerance: CS > BT > BC. Cadmium concentrations in shoots and grain increased when exposed to Cd. Only CS did not exceed the maximum Cd limit permitted in food (0.40 mg kg(-1)), when rates up to 1.3 mg kg(-1) of Cd were applied to soil. Considering daily rice consumption levels in Brazil, Cd intake often exceeds maximum tolerable levels. Continuous monitoring of soil Cd concentrations is a pivotal step in avoiding hazards to humans. Such monitoring is important on a global scale since outside of Asia, Brazil is the leading rice-producing and rice-consuming country. (AU)

• FAPESP's process: 12/07158-6 - Genotypic variation of rice plants exposed to cadmium (109Cd): nutritional, biochemical and ultrastructural assessment
• Grantee: Thiago Assis Rodrigues Nogueira
• Support Opportunities: Scholarships in Brazil - Post-Doctoral