Describe the role of Agrobacterium tumefaciens in transforming a plant cell.

(N/A) The tumor-inducing $(Ti)$ plasmid of $Agrobacterium$ $tumefaciens$ has been modified into a cloning vector. This modified plasmid is no longer pathogenic to plants but retains the ability to use its natural mechanism to deliver genes of interest into a variety of plant cells. This process is widely used in genetic engineering to create transgenic plants.