Isolation, identification and evaluation of arsenic resistance of fungi from the rhizosphere of rice (Oryza sativa L.)

• Grant number: 12/22663-9
• Support type: Scholarships in Brazil - Scientific Initiation
• Effective date (Start): February 01, 2013
• Effective date (End): January 31, 2014
• Field of knowledge: Health Sciences - Pharmacy - Toxicological Analysis
• Principal researcher: Bruno Lemos Batista
• Grantee: Camila Veronez Barião
• Home Institution: Faculdade de Ciências Farmacêuticas de Ribeirão Preto (FCFRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

Arsenic (As) is considered the most toxic xenobiotic according to the Agency for Registration of Toxic Substances and Disease (ATSDR) in the United States. Among the chemical species present in the environment, inorganics (As3+ and As5+) are the most toxic to humans and the methylated forms are less toxic (monomethyl arsenic, dimethyl arsenic, and arsenobetaine). When present in the soil, As is readily absorbed by the roots of rice, reaching the grains. This cereal is an important food of Brazilians and almost half of the world's population, and, thus, a relevant route of exposure. This plant has a special mechanism that favors the absorption of As by roots, especially As3+ when cultivated on flooded soils. It is known that the rice consumed in Brazil has an average concentration of As >222 ngg-1 and, depending on the cultivation area, concentrations >300 ngg-1, maximum concentration in the grains, according to the public consultation of the National Agency for Sanitary Surveillance (ANVISA). Currently, the use of microorganisms as a bioremediation tool has been widely studied. Research with fungi has been developed in order to reduce the absorption of As by rice plants, exploiting the ability of these microorganisms to bio-adsorption, metabolize, and/or bio-accumulate As. Therefore, this project aims to isolate fungi from soil intensively and prolonged use on rice (Oryza sativa L.) cultivation, evaluating their capacity of resistance and activity on absorption/adsorption and/or metabolism in vitro. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BORGES, ENDLER MARCEL; LAFAYETTE NEVES GELINSKI, JANE MARY; DE OLIVEIRA SOUZA, VANESSA CRISTINA; BARBOSA, JR., FERNANDO; BATISTA, BRUNO LEMOS. Monitoring the authenticity of organic rice via chemometric analysis of elemental data. Food Research International, v. 77, n. 3, p. 299-309, NOV 2015. (12/03465-1, 12/22663-9, 12/03746-0, 10/07566-1)