T. C. Helmann

Differential virulence contributions of the efflux transporter MexAB-OprM in Pseudomonas syringae infecting a variety of host plants

This study shows that MexB in Pseudomonas syringae contributes to epiphytic growth and lesion formation in some plants but not others, highlighting variation in host defenses.

Genome-wide identification of genes important for growth of Dickeya dadantii and D. dianthicola in potato (Solanum tuberosum) tubers

The paper identifies genes critical for growth of Dickeya species in potato tubers using RB-TnSeq and orthologous gene analysis across strains.

Genome-wide identification of tomato xylem sap fitness factors for three plant-pathogenic Ralstonia species

This paper identifies genes essential for Ralstonia spp. growth in tomato xylem sap using RB-TnSeq, revealing envelope-related factors critical for survival in this niche.

Distinctiveness of genes contributing to growth of Pseudomonas syringae in diverse host plant species

This study identifies genes contributing to Pseudomonas syringae growth in three plant hosts, finding 50 genes with distinct fitness contributions across species.

Genome-wide transposon screen of a Pseudomonas syringae mexB mutant reveals the substrates of efflux transporters

The paper identifies efflux transporter substrates in Pseudomonas syringae by screening a transposon mutant library in a mexB mutant background, revealing redundant transporters with overlapping substrate specificities.

Genome-wide identification of Pseudomonas syringae genes required for competitive fitness during colonization of the leaf surface and apoplast

This study identifies Pseudomonas syringae genes critical for leaf surface and apoplast colonization using transposon mutagenesis, revealing gene expression and fitness are not correlated.