Joyce E. Loper

Mobile genetic elements in the genome of the beneficial rhizobacterium Pseudomonas fluorescensPf-5 (2009)

Mavrodi, Dmitri V, Loper, Joyce E, Paulsen, Ian T, Thomashow, Linda S

Abstract Background Pseudomonas fluorescens Pf-5 is a plant-associated bacterium that inhabits the rhizosphere of a wide variety of plant species and and produces secondary metabolites suppressive of...

Comparison of the complete genome sequences of Pseudomonas syringae pv. syringae B728a and pv. tomato DC3000. (2005)

Feil, Helene, Feil, William S., Chain, Patrick, Larimer, Frank, DiBartolo, Genevieve, Copeland, Alex, ...

The complete genomic sequence of Pseudomonas syringae pathovar syringae B728a (Pss B728a), has been determined and is compared with that of Pseudomonas syringae pv. tomato DC3000 (Pst DC3000). These...

Utilization of Heterologous Siderophores Enhances Levels of Iron Available to Pseudomonas putida in the Rhizosphere

Loper, Joyce E., Henkels, Marcella D.

Pseudomonas spp. have the capacity to utilize siderophores produced by diverse species of bacteria and fungi, and the present study was initiated to determine if siderophores produced by rhizosphere...

Lon Protease Influences Antibiotic Production and UV Tolerance of Pseudomonas fluorescens Pf-5

Whistler, Cheryl A., Stockwell, Virginia O., Loper, Joyce E.

Pseudomonas fluorescens Pf-5 is a soil bacterium that suppresses plant pathogens due in part to its production of the antibiotic pyoluteorin. Previous characterization of Pf-5 revealed three global...

Characterization of the Pyoluteorin Biosynthetic Gene Cluster of Pseudomonas fluorescens Pf-5

Nowak-Thompson, Brian, Chaney, Nancy, Wing, Jenny S., Gould, Steven J., Loper, Joyce E.

Ten genes (plt) required for the biosynthesis of pyoluteorin, an antifungal compound composed of a bichlorinated pyrrole linked to a resorcinol moiety, were identified within a 24-kb genomic region...

The Two-Component Regulators GacS and GacA Influence Accumulation of the Stationary-Phase Sigma Factor ςS and the Stress Response in Pseudomonas fluorescens Pf-5

Whistler, Cheryl A., Corbell, Nathan A., Sarniguet, Alain, Ream, Walter, Loper, Joyce E.

Three global regulators are known to control antibiotic production by Pseudomonas fluorescens. A two-component regulatory system comprised of the sensor kinase GacS (previously called ApdA or LemA)...

Cloning and Characterization of Aerobactin Biosynthesis Genes of the Biological Control Agent Enterobacter cloacae

Loper, Joyce E., Ishimaru, Carol A., Carnegie, Susan R., Vanavichit, Apichart

Five strains of Enterobacter cloacae that are biological control agents of Pythium damping-off diseases produced the hydroxamate siderophore aerobactin under iron-limiting conditions. Genes...

Two Genomic Regions Involved in Catechol Siderophore Production by Erwinia carotovora

Bull, Carolee T., Ishimaru, Carol A., Loper, Joyce E.

Two regions involved in catechol biosynthesis (cbs) of Erwinia carotovora W3C105 were cloned by functional complementation of Escherichia coli mutants that were deficient in the biosynthesis of the...

Derivation of Mutants of Erwinia carotovora subsp. betavasculorum Deficient in Export of Pectolytic Enzymes with Potential for Biological Control of Potato Soft Rot

Costa, José M., Loper, Joyce E.

Erwinia carotovora subsp. betavasculorum Ecb168 produces an antibiotic(s) that suppresses growth of the related bacterium Erwinia carotovora subsp. carotovora in culture and in wounds of potato...

Population Dynamics of Soil Pseudomonads in the Rhizosphere of Potato (Solanum tuberosum L.)

Loper, Joyce E., Haack, Caryn, Schroth, Milton N.

Rhizosphere population dynamics of seven Pseudomonas fluorescens and Pseudomonas putida strains isolated from rhizospheres of various agricultural plants were studied on potato (Solanum tuberosum L.)...

Positive Autoregulation and Signaling Properties of Pyoluteorin, an Antibiotic Produced by the Biological Control Organism Pseudomonas fluorescens Pf-5

Brodhagen, Marion, Henkels, Marcella D., Loper, Joyce E.

Pseudomonas fluorescens Pf-5, a rhizosphere bacterium, produces a suite of secondary metabolites that are toxic to seed- and root-rotting plant pathogens. Among these are the polyketide compounds...

Comparison of the complete genome sequences of Pseudomonas syringae pv. syringae B728a and pv. tomato DC3000

Feil, Helene, Feil, William S., Chain, Patrick, Larimer, Frank, DiBartolo, Genevieve, Copeland, Alex, ...

The complete genomic sequence of Pseudomonas syringae pv. syringae B728a (Pss B728a) has been determined and is compared with that of P. syringae pv. tomato DC3000 (Pst DC3000). The two pathovars of...

Reciprocal Regulation of Pyoluteorin Production with Membrane Transporter Gene Expression in Pseudomonas fluorescens Pf-5

Brodhagen, Marion, Paulsen, Ian, Loper, Joyce E.

Pyoluteorin is a chlorinated polyketide antibiotic secreted by the rhizosphere bacterium Pseudomonas fluorescens Pf-5. Genes encoding enzymes and transcriptional regulators involved in pyoluteorin...

Utilization of Heterologous Siderophores Enhances Levels of Iron Available to Pseudomonas putida in the Rhizosphere

Loper, Joyce E., Henkels, Marcella D.

Pseudomonas spp. have the capacity to utilize siderophores produced by diverse species of bacteria and fungi, and the present study was initiated to determine if siderophores produced by rhizosphere...

Lon Protease Influences Antibiotic Production and UV Tolerance of Pseudomonas fluorescens Pf-5

Whistler, Cheryl A., Stockwell, Virginia O., Loper, Joyce E.

Pseudomonas fluorescens Pf-5 is a soil bacterium that suppresses plant pathogens due in part to its production of the antibiotic pyoluteorin. Previous characterization of Pf-5 revealed three global...

Characterization of the Pyoluteorin Biosynthetic Gene Cluster of Pseudomonas fluorescens Pf-5

Nowak-Thompson, Brian, Chaney, Nancy, Wing, Jenny S., Gould, Steven J., Loper, Joyce E.

Ten genes (plt) required for the biosynthesis of pyoluteorin, an antifungal compound composed of a bichlorinated pyrrole linked to a resorcinol moiety, were identified within a 24-kb genomic region...

The Two-Component Regulators GacS and GacA Influence Accumulation of the Stationary-Phase Sigma Factor ςS and the Stress Response in Pseudomonas fluorescens Pf-5

Whistler, Cheryl A., Corbell, Nathan A., Sarniguet, Alain, Ream, Walter, Loper, Joyce E.

Three global regulators are known to control antibiotic production by Pseudomonas fluorescens. A two-component regulatory system comprised of the sensor kinase GacS (previously called ApdA or LemA)...

Cloning and Characterization of Aerobactin Biosynthesis Genes of the Biological Control Agent Enterobacter cloacae

Loper, Joyce E., Ishimaru, Carol A., Carnegie, Susan R., Vanavichit, Apichart

Five strains of Enterobacter cloacae that are biological control agents of Pythium damping-off diseases produced the hydroxamate siderophore aerobactin under iron-limiting conditions. Genes...

Two Genomic Regions Involved in Catechol Siderophore Production by Erwinia carotovora

Bull, Carolee T., Ishimaru, Carol A., Loper, Joyce E.

Two regions involved in catechol biosynthesis (cbs) of Erwinia carotovora W3C105 were cloned by functional complementation of Escherichia coli mutants that were deficient in the biosynthesis of the...

Derivation of Mutants of Erwinia carotovora subsp. betavasculorum Deficient in Export of Pectolytic Enzymes with Potential for Biological Control of Potato Soft Rot

Costa, José M., Loper, Joyce E.

Erwinia carotovora subsp. betavasculorum Ecb168 produces an antibiotic(s) that suppresses growth of the related bacterium Erwinia carotovora subsp. carotovora in culture and in wounds of potato...

Population Dynamics of Soil Pseudomonads in the Rhizosphere of Potato (Solanum tuberosum L.)

Loper, Joyce E., Haack, Caryn, Schroth, Milton N.

Rhizosphere population dynamics of seven Pseudomonas fluorescens and Pseudomonas putida strains isolated from rhizospheres of various agricultural plants were studied on potato (Solanum tuberosum L.)...

Positive Autoregulation and Signaling Properties of Pyoluteorin, an Antibiotic Produced by the Biological Control Organism Pseudomonas fluorescens Pf-5

Brodhagen, Marion, Henkels, Marcella D., Loper, Joyce E.

Pseudomonas fluorescens Pf-5, a rhizosphere bacterium, produces a suite of secondary metabolites that are toxic to seed- and root-rotting plant pathogens. Among these are the polyketide compounds...

Comparison of the complete genome sequences of Pseudomonas syringae pv. syringae B728a and pv. tomato DC3000

Feil, Helene, Feil, William S., Chain, Patrick, Larimer, Frank, DiBartolo, Genevieve, Copeland, Alex, ...

The complete genomic sequence of Pseudomonas syringae pv. syringae B728a (Pss B728a) has been determined and is compared with that of P. syringae pv. tomato DC3000 (Pst DC3000). The two pathovars of...

Reciprocal Regulation of Pyoluteorin Production with Membrane Transporter Gene Expression in Pseudomonas fluorescens Pf-5

Brodhagen, Marion, Paulsen, Ian, Loper, Joyce E.

Pyoluteorin is a chlorinated polyketide antibiotic secreted by the rhizosphere bacterium Pseudomonas fluorescens Pf-5. Genes encoding enzymes and transcriptional regulators involved in pyoluteorin...

Isolation and Identification of Rhizoxin Analogs from Pseudomonas fluorescens Pf-5 by Using a Genomic Mining Strategy▿ †

Loper, Joyce E., Henkels, Marcella D., Shaffer, Brenda T., Valeriote, Frederick A., Gross, Harald

The products synthesized from a hybrid polyketide synthase/nonribosomal peptide synthetase gene cluster in the genome of Pseudomonas fluorescens Pf-5 were identified using a genomics-guided strategy...