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.
She was the first (1977) to demonstrate the presence of a fragment of Agrobacterium Ti plasmid DNA in the nuclear DNA of crown gall tissue.
Transfer DNA (or T-DNA), the transferred DNA of the tumor-inducing (Ti) plasmid of some species of bacteria such as Agrobacterium tumefaciens