NCIt definition : A species of Gram negative, rod shaped bacteria assigned to the phylum Proteobacteria.
This bacteria is motile by flagella and mediates the horizontal gene transfer of its
Ti plasmid to infect plants. A. tumefaciens is commonly found in soil and around the
root surfaces of plants and is the causative agent of crown gall disease.;
Alternative definition : CDISC: Any bacterial organism that can be assigned to the species Agrobacterium tumefaciens.;