ArticleApplied and environmental microbiology2005
Expression of nitrite and nitric oxide reductases in free-living and plant-associated Agrobacterium tumefaciens C58 cells.
Article in Applied and environmental microbiology, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 38 citations in OpenAlex.
- Phyllosphere of senescent crops as a microbial NFrontiers in microbiology · 2025Article
- Ecological Conditions and Molecular Determinants Involved inFrontiers in plant science · 2019Review
- Removal of tetracycline by aerobic granular sludge and its bacterial community dynamics in SBR.RSC advances · 2018Article
- Responses of bacterial community structure and denitrifying bacteria in biofilm to submerged macrophytes and nitrate.Scientific reports · 2016Article
- Comparative Analysis of Denitrifying Activities of Hyphomicrobium nitrativorans, Hyphomicrobium denitrificans, and Hyphomicrobium zavarzinii.Applied and environmental microbiology · 2015Article
- Expression of Agrobacterium Homolog Genes Encoding T-complex Recruiting Protein under Virulence Induction Conditions.Frontiers in microbiology · 2015Article
- Characterization of nitrite degradation by Lactobacillus casei subsp. rhamnosus LCR 6013.PloS one · 2014Article
- Bacterial adaptation of respiration from oxic to microoxic and anoxic conditions: redox control.Antioxidants & redox signaling · 2012Review
- Metabolic modeling of denitrification in Agrobacterium tumefaciens: a tool to study inhibiting and activating compounds for the denitrification pathway.Frontiers in microbiology · 2012Article
- Article
- Nitric oxide reductase gene expression and nitrous oxide production in nitrate-grown Pseudomonas mandelii.Applied and environmental microbiology · 2008Article
- Agrobacterium tumefaciens C58 uses ActR and FnrN to control nirK and nor expression.Journal of bacteriology · 2008Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
A number of the bacteria that form associations with plants are denitrifiers. To learn more about how the association with plants affects expression of denitrification genes, the regulation of nitrite and nitric oxide reductases was investigated in Agrobacterium tumefaciens. Analysis of free-living cells revealed that expression of the genes encoding nitrite and nitric oxide reductases, nirK and nor, respectively, requires low-oxygen conditions, nitric oxide, and the transcriptional regulator NnrR. Expression of nor was monitored in plant-associated bacteria using nor-gfp fusion expression. In root association experiments, only a small percentage of the attached cells were fluorescent, even when they were incubated under a nitrogen atmosphere. Inactivation of nirK had no significant effect on the ability of A. tumefaciens to bind to plant roots regardless of the oxygen tension, but it did decrease the occurrence of root-associated fluorescent cells. When wild-type cells containing the gfp fusion were infiltrated into leaves, most cells eventually became fluorescent. The same result was obtained when a nirK mutant was used, suggesting that nitric oxide activated nor expression in the endophytic bacteria. Addition of a nitric oxide synthase inhibitor to block nitric oxide generation by the plant prevented gfp expression in infiltrated nitrite reductase mutants, demonstrating that plant-derived nitric oxide can activate nor expression in infiltrated cells.
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