1 Laboratory of Environmental Microbiology, Embrapa Environment, Brazilian Agricultural Research Corporation, EMBRAPA, Jaguariúna, São Paulo, Brazil.
2 Agrivalle, Pouso Alegre, Minas Gerais, Brazil.
3 Laboratory of Environmental Microbiology, Embrapa Environment, Brazilian Agricultural Research Corporation, EMBRAPA, Jaguariúna, São Paulo, Brazil itamar.melo@embrapa.br.