= Pseudomonas syringae pv. tomato DC3000
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<Pseudomonas syringae pv. tomato DC3000> is the name used for a well-studied <bacterial strain> in experimental interactions with tomato and <Arabidopsis thaliana>. The abbreviation `pv.` denotes <pathovar>, a classification related to pathogenic characteristics, while `DC3000` identifies the particular strain. Those parts of the label carry more information than the <species> name <Pseudomonas syringae> alone.<The complete genome sequence of the Arabidopsis and tomato pathogen Pseudomonas syringae pv. tomato DC3000 by C. Robin Buell and others>[Abstract, model-strain identity and named plant hosts]{ref}
The 2003 genome report described about 6.5 megabases of <DNA>, comprising one circular <chromosome> and two <plasmids>, with 5763 predicted <open reading frames>. The assembly and annotation created a reference for comparing molecular observations, rather than merely attaching a name to a culture.<The complete genome sequence of the Arabidopsis and tomato pathogen Pseudomonas syringae pv. tomato DC3000 by C. Robin Buell and others>[Abstract and Figure1, genome components and publication-specific annotation]{ref} A predicted <open reading frame> is not automatically an experimentally established <protein> function.
In a 2011 plant-community experiment, this strain supplied a common challenge against which different bacterial colonists were compared. Both pathogen population and host disease symptoms were measured.<Protection of Arabidopsis thaliana against leaf-pathogenic Pseudomonas syringae by Sphingomonas strains in a controlled model system by Gerd Innerebner and others>[Abstract and Figures1–2]{ref} Holding the challenge strain fixed makes differences between colonist treatments easier to interpret. It does not make the experiment representative of every <Pseudomonas syringae> strain or every host.
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