Adela R. Ramos

TL;DR: The complete genome sequence of the model bacterial pathogen Pseudomonas syringae pathovar tomato DC3000 (DC3000), which is pathogenic on tomato and Arabidopsis thaliana, is reported and 1,159 genes unique to DC3000 are revealed, of which 811 lack a known function.

TL;DR: Pseudomonas syringae secretes HopPsyA and AvrPto in culture in a Hrp-dependent manner at pH and temperature conditions associated with pathogenesis, indicating that a universal targeting signal is recognized by the type III secretion systems of both plant and animal pathogens.

TL;DR: Harpins are a subset of type III secretion system (T3SS) substrates found in all phytopathogenic bacteria that utilize a T3SS, and genetic techniques to recycle antibiotic markers were applied to DC3000 to generate a quadruple harpin gene polymutant, which suggests that a consortium of semiredundant translocators from three protein classes cooperate to form the P. syringae T3 SS translocon.

TL;DR: Observations support the concept that the P. syringae effector proteins, rather than secretion system components, are the primary determinants of host range at both the species and cultivar levels of host specificity.

TL;DR: The taxis response of Rhodobacter sphaeroides 2.4.3, Rhodopseudomonas palustris, and Agrobacterium tumefaciens to nitrate and nitrite was evaluated by observing the macroscopic behavior of cells suspended in soft agar and incubated under various conditions.