How is the Ti plasmid of Agrobacterium tumefaciens used in plant genetic engineering? Explain the process in detail.

The Ti (tumor-inducing) plasmid found in Agrobacterium tumefaciens serves as a crucial tool in plant genetic engineering, facilitating the transfer of specific DNA into plant cells. This natural mechanism has been harnessed by scientists to introduce desired genes into plants, creating genetically modified organisms (GMOs) with improved traits, such as increased resistance to pests, enhanced tolerance to environmental stresses, or higher nutritional value.

The process of using the Ti plasmid in plant genetic engineering involves several key steps:

1. Identification of Desired Gene: Scientists first isolate and identify the gene of interest that they want to introduce into the plant. This gene could confer traits like insect resistance, herbicide tolerance, or increased nutritional content.

2. Preparation of Ti Plasmid: The Ti plasmid from Agrobacterium tumefaciens is modified in the ____ ____ ___ ___ ___.
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