Improved Medium for Isolation of Azospirillum spp.
Colonies of Azospirillum spp. could be readily distinguished from colonies of other diazotrophs by scarlet coloration in culture media in which Congo red was included.
Cáceres
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Departamento de Microbiología, Instituto Nacional de Tecnología, Agropecuaria, 1712 Castelar, Buenos Aires, Argentina.