ArticleApplied and environmental microbiology2001
Involvement of nitrate reductase and pyoverdine in competitiveness of Pseudomonas fluorescens strain C7R12 in soil.
Article in Applied and environmental microbiology, 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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Who cites it
14 citing papers in PubMed.
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- Metabolic and Genomic Traits of Phytobeneficial Phenazine-ProducingApplied and environmental microbiology · 2020Article
- Impact of Bacterial Siderophores on Iron Status and Ionome in Pea.Frontiers in plant science · 2020Article
- Genetic factors involved in rhizosphere colonization by phytobeneficialComputational and structural biotechnology journal · 2020Review
- Arginine Biosynthesis Modulates Pyoverdine Production and Release in Pseudomonas putida as Part of the Mechanism of Adaptation to Oxidative Stress.Journal of bacteriology · 2019Article
- Core regulon of the global anaerobic regulator Anr targets central metabolism functions in Pseudomonas species.Scientific reports · 2019Article
- Unusual extracellular appendages deployed by the model strain Pseudomonas fluorescens C7R12.PloS one · 2019Article
- Arbuscular mycorrhizal fungi and plant growth-promoting pseudomonads improve yield, quality and nutritional value of tomato: a field study.Mycorrhiza · 2017Article
- Article
- Genome sequence analysis of Pseudomonas extremaustralis provides new insights into environmental adaptability and extreme conditions resistance.Extremophiles : life under extreme conditions · 2015Article
- Identification of traits shared by rhizosphere-competent strains of fluorescent pseudomonads.Microbial ecology · 2012Article
- Comparative genetic diversity of the narG, nosZ, and 16S rRNA genes in fluorescent pseudomonads.Applied and environmental microbiology · 2003Article
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4 authors.
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Abstract
Involvement of nitrate reductase and pyoverdine in the competitiveness of the biocontrol strain Pseudomonas fluorescens C7R12 was determined, under gnotobiotic conditions, in two soil compartments (bulk and rhizosphere soil), with the soil being kept at two different values of matric potential (-1 and -10 kPa). Three mutants affected in the synthesis of either the nitrate reductase (Nar(-)), the pyoverdine (Pvd(-)), or both (Nar(-) Pvd(-)) were used. The Nar(-) and Nar(-) Pvd(-) mutants were obtained by site-directed mutagenesis of the wild-type strain and of the Pvd(-) mutant, respectively. The selective advantage given by nitrate reductase and pyoverdine to the wild-type strain was assessed by measuring the dynamic of each mutant-to-total-inoculant (wild-type strain plus mutant) ratio. All three mutants showed a lower competitiveness than the wild-type strain, indicating that both nitrate reductase and pyoverdine are involved in the fitness of P. fluorescens C7R12. The double mutant presented the lowest competitiveness. Overall, the competitive advantages given to C7R12 by nitrate reductase and pyoverdine were similar. However, the selective advantage given by nitrate reductase was more strongly expressed under conditions of lower aeration (-1 kPa). In contrast, the selective advantage given by nitrate reductase and pyoverdine did not differ in bulk and rhizosphere soil, indicating that these bacterial traits are not specifically involved in the rhizosphere competence but rather in the saprophytic ability of C7R12 in soil environments.
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