Mycoflora and determination of aflatoxins in peanut variety grown in differents producing regions in the state of São Paulo.

Author(s)

Danielle Diniz Atayde

• Document type: Master's Dissertation
• Press: São Paulo.
• Institution: Universidade de São Paulo (USP). Instituto de Ciências Biomédicas (ICB/SDI)
• Defense date: 2009-12-04

Examining board members

Benedito Correa; José Ribamar dos Santos Ferreira Júnior; Ignácio José de Godoy

• Advisor: Benedito Correa
• Field of knowledge: Agronomical Sciences - Food Science and Technology
• Indexed in: Banco de Dados Bibliográficos da USP-DEDALUS; Biblioteca Digital de Teses e Dissertações - USP
• Location: Universidade de São Paulo. Biblioteca do Instituto de Ciências Biomédicas; T-ICB BMM QW4; D585mf

Abstract

The objectives were: to identify the mycoflora and the occurrence of aflatoxins in a peanut variety, identify the soil mycoflora and compare the acquired results with the levels of water activity found. The samples (peanut and soil) were collected from: Jaboticabal, Rosália, Tupã and Cafelândia (SP/Brazil). The mycoflora of the soil revealed that the genus Penicillium was the most frequent (52.1 %) in the four regions during the two trials (after the emergence of the plants and two weeks before the uprooting). Within the genus Aspergillus, A. flavus was the most frequent specie (13.5 %). The mycoflora of the kernels and peanut hulls, from the four regions in the two trials (two weeks before the uprooting and after the uprooting), demonstrated greater frequency of isolation of the genus Fusarium (70.2 %). Within the genus Aspergillus, A. flavus was the most frequent specie (9.8 %). The analysis of aflatoxins revealed the presence of aflatoxins in 5 % of the kernels samples analyzed. In peanut hulls, 13.75 % of the samples presented aflatoxin contamination. (AU)