Transcriptional regulation of pseudobactin synthesis in the plant growth-promoting Pseudomonas B10

Leoni, L

doi:10.1016/s0378-1097(02)00451-2

Cited by 9 publications

(12 citation statements)

References 19 publications

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“…These fluorescent pigments and water-soluble pigments are among the important siderophores (Leoni et al 2002). Meyer (2000) stated that different Pseudomonas strains have the ability to produce high amounts of siderophore.…”

Section: Discussionmentioning

confidence: 99%

Plant growth-promoting activities of fluorescent pseudomonads, isolated from the Iranian soils

et al. 2009

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Fluorescent pseudomonads are among the most influencing plant growth-promoting rhizobacteria in plants rhizosphere. In this research work the plant growthpromoting activities of 40 different strains of Pseudomonas fluorescens and Pseudomonas putida, previously isolated from the rhizosphere of wheat (Triticum aestivum L.) and canola (Brassica napus L.) and maintained in the microbial collection of Soil and Water Research Institute, Tehran, Iran, were evaluated. The ability of bacteria to produce auxin and siderophores and utilizing P sources with little solubility was determined. Four strains of Wp1 (P. putida), Cfp10 (Pseudomonas sp.), Wp150 (P. putida), and Wp159 (P. putida) were able to grow in the DF medium with ACC. Thirty percent of bacterial isolates from canola rhizosphere and 33% of bacterial isolates from wheat rhizosphere were able to produce HCN. The results indicate that most of the bacteria, tested in the experiment, have plant growth-promoting activities. This is the first time that such PGPR species are isolated from the Iranian soils. With respect to their great biological capacities they can be used for wheat and canola inoculation in different parts of the world, which is of very important agricultural implications.

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Section: Discussionmentioning

confidence: 99%

Plant growth-promoting activities of fluorescent pseudomonads, isolated from the Iranian soils

et al. 2009

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“…The alignment was carried out using the clustalw program, available at http://clustalw.genome.ad.jp/. Identical residues and the following sets of residues were considered to match: DE, NQ, RK, ST, FYW and ILVM, as in Leoni et al . (2002).…”

Section: Resultsmentioning

confidence: 99%

Detection of multiple extracytoplasmic function (ECF) sigma factors in the genome of Pseudomonas putida KT2440 and their counterparts in Pseudomonas aeruginosa PA01

Martínez-Bueno

Tobes

Rey

et al. 2002

Environmental Microbiology

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Pseudomonas putida KT2440 is highly successful in colonizing a variety habitats, including aquatic and edaphic niches. In accordance with this ability and with the need to adapt to changing environmental conditions, P. putida has developed sophisticated mechanisms of transcriptional regulation. We analysed, at the genome level, the repertoire of sigma factors in P. putida KT2440 and identified 24 sigma factors, 19 of which corresponded to the subfamily of extracytoplasmic function (ECF) sigma factors. We detected 13 ECF sigma factors that showed similarity to the Escherichia coli FecI sigma factor, which is involved in iron acquisition. In 11 cases, a fecR-like gene was found adjacent to the fecI-like gene and, in 10 cases, a gene encoding an iron receptor lies in the vicinity of the fecI/fecR cluster. This may explain the ability of P. putida KT2440 to grow under low iron availability conditions. Five fecI/fecR/iron receptor gene clusters from P. putida were also identified in the human pathogen Pseudomonas aeruginosa.

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“…PsbS from Pseudomonas B10 and RpoI from Rhizobium leguminosarum are iron‐controlled genes involved in siderophore biosynthesis (Yeoman et al. , 1999; Leoni et al. , 2002); BupI from Bordetella bronchiseptica controls the expression of a putative siderophore receptor gene (Pradel and Locht, 2001); and FiuI and PigD from P. aeruginosa are encoded by Fur‐regulated genes and are likely to be involved in the expression of receptors for exogenous iron chelates (Ochsner and Vasil, 1996).…”

Section: The Iron Starvation Subfamily Of Ecf Sigma Factorsmentioning

confidence: 99%

Iron transport and regulation, cell signalling and genomics: lessons from Escherichia coli and Pseudomonas

Visca¹,

Leoni

Wilson

et al. 2002

Molecular Microbiology

245

259

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Fig. 3.Organization and evolutionary traits of surface signalling systems of P. aeruginosa and C. crescentus. A. Organisation of fecI (black arrow), fecR (grey arrow) and fecA (white arrow) homologues in the P.aeruginosa (PA) and C. crescentus (CC) genomes. Annotations are according to the P. aeruginosa and C. crescentus genome databases (www.pseudomonas.com and www.tigr.org respectively). Genes (not to scale) are oriented according to the direction of transcription. B. Co-evolution of the iron starvation sigma factors and cognate anti-sigmas. The trees have been adapted from those available at the COG (cluster of orthologous groups of proteins) database (www.ncbi.nlm.nih.gov/cgi-bin/COG). These are based on multiple sequence alignment of all members of COGs 1945 (RpoE orthologues) and 3712 (FecR orthologues), according to the criteria described in www.ncbi.nlm.nih.gov/COG/COGhelp.html. Only protein sequences from P.aeruginosa and C. crescentus were included in the figure. The branch linking the iron starvation subfamily of ECF sigma factors with other members of COG 1945 is indicated (¥). Double-headed arrows connect physically and evolutionarily linked sigma-anti-sigma units.

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Transcriptional regulation of pseudobactin synthesis in the plant growth-promoting Pseudomonas B10

Cited by 9 publications

References 19 publications

Plant growth-promoting activities of fluorescent pseudomonads, isolated from the Iranian soils

Plant growth-promoting activities of fluorescent pseudomonads, isolated from the Iranian soils

Detection of multiple extracytoplasmic function (ECF) sigma factors in the genome of Pseudomonas putida KT2440 and their counterparts in Pseudomonas aeruginosa PA01

Iron transport and regulation, cell signalling and genomics: lessons from Escherichia coli and Pseudomonas

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