title: Fungi, mycotoxins and phytoalexin in peanut varieties, during plant growth in the field.
abstract: The aim of the present study was to analyze the mycobiota, occurrence of mycotoxins (aflatoxins and cyclopiazonic acid), and production of phytoalexin (trans-resveratrol) in two peanut varieties (Runner IAC 886 and Caiapó) during plant growth in the field. Climatic factors (rainfall, relative humidity and temperature) and water activity were also evaluated. The results showed a predominance of Fusarium spp. in kernels and pods, followed by Penicillium spp. and Aspergillus flavus. Aflatoxins were detected in 20% and 10% of samples of the IAC 886 and Caiapó varieties, respectively. Analysis showed that 65% of kernel samples of the IAC 886 variety and 25% of the Caiapó variety were contaminated with cyclopiazonic acid. trans-Resveratrol was detected in 6.7% of kernel samples of the IAC 886 variety and in 20% of the Caiapó variety. However, trans-resveratrol was found in 73.3% of leaf samples in the two varieties studied.
authors.affiliation: Departamento de Microbiologia, Instituto Ciências Biomédicas, Universidade de São Paulo, SP, Brazil.
authors.forename: Patrícia
authors.initials: P
authors.lastname: Zorzete
authors.affiliation: Departamento de Microbiologia, Instituto Ciências Biomédicas, Universidade de São Paulo, SP, Brazil.
authors.forename: Tatiana A
authors.initials: TA
authors.lastname: Reis
authors.affiliation: Laboratório de Química e Farmacologia de Produtos Naturais e Sintéticos, Centro de Sanidade Animal, Instituto Biológico, SP, Brazil.
authors.forename: Joana D
authors.initials: JD
authors.lastname: Felício
authors.affiliation: Departamento de Microbiologia, Instituto Ciências Biomédicas, Universidade de São Paulo, SP, Brazil.
authors.forename: Arianne C
authors.initials: AC
authors.lastname: Baquião
authors.affiliation: Coordenadoria de Assistência Técnica Integral/CATI, Tupã, SP, Brazil.
authors.forename: Paulo
authors.initials: P
authors.lastname: Makimoto
authors.affiliation: Departamento de Microbiologia, Instituto Ciências Biomédicas, Universidade de São Paulo, SP, Brazil. Electronic address: correabe@usp.br.
authors.forename: Benedito
authors.initials: B
authors.lastname: Corrêa
keywords: Aflatoxins; Aspergillus flavus; Aspergillus parasiticus; Cyclopiazonic acid; Peanut; Water activity; trans-Resveratrol