[1] Univ Fed Minas Gerais, Inst Ciencias Biol ICB, Dept Microbiol, BR-31270901 Belo Horizonte, MG, Brazil
[2] Embrapa Agrobiol, BR-23890000 Seropedica, RJ, Brazil
[3] Univ Fed Roraima, Dept Biol, BR-69310270 Boa Vista, RR, Brazil
[4] Univ Fed Santa Catarina, Dept Bioquim, Ctr Ciencias Biol, Florianopolis, SC, Brazil
[5] Ctr Fed Educ Tecnol Minas Gerais, Dept Quim, Belo Horizonte, MG, Brazil
[6] Univ Western Ontario, Dept Biol, London, ON N6A 5B7, Canada