2001•Journal of BacteriologyOpen access

Control of Nitrogenase Reactivation by the GlnZ Protein in Azospirillum brasilense

Giseli Klassen, Emanuel Maltempi de Souza, Marshall Geoffrey Yates, Liu Un Rigo, Juliana Inaba, Fábio de Oliveira Pedrosa

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Abstract

The glnZ mutant of Azospirillum brasilense (strain 7611) showed only partial recovery (20 to 40%) after 80 min of ammonia-induced nitrogenase switch-off, whereas the wild type recovered totally within 10 min. In contrast, the two strains showed identical anoxic-induced switch-on/switch-off, indicating no cross talk between the two reactivation mechanisms.

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Key concepts: Azospirillum brasilense, Nitrogenase, Biology, Mutant, Strain (injury), Microbiology, Microbial inoculant, Anoxic waters