What is the main purpose of "how bacteria passes dna to plants"

entering a plant through a wound site, the bacterium inserts a segment of its own DNA into the plant's genome. The genes in this insertion stimulate the synthesis of plant growth hormones, which cause a tumerous proliferation of plant cells that leads to a blight known as crown gall disease. And those genes instruct the plant to produce opines--compounds containing the carbon and nitrogen Agrobacterium lives on.