Arabidopsis thaliana may be a relative newcomer in the "model organisms" arena, but it has made a big splash in the field of plant biology. This small mustard plant is currently the organism of choice in many research areas in plant biology, including development, metabolism, environmental adaptability and pathogen interactions. But why choose this plant over agriculturally important plants such as wheat, corn, or tomato? While Arabidopsis isn't a crop plant, it does posses unique features, that make it the model organism of choice. These features include a small genome, small stature, and a short generation time with abundant seed production. Arabidopsis is a diploid plant and is readily transformed, making genetic studies more practical.
Lehle seeds This site
offers information on "everything Arabidopsis."
TAIR The Arabidopsis Information Resource.
The Nottingham stock centre