The use of the gene gun may be contrasted with the use of Agrobacterium tumefaciens and its Ti plasmid to insert genetic information into plant cells.
Agrobacterium tumefaciens is a type of bacteria that transfers its DNA via horizontal gene transfer to create tumors in plants.
Transfer DNA (or T-DNA), the transferred DNA of the tumor-inducing (Ti) plasmid of some species of bacteria such as Agrobacterium tumefaciens