Scientists have been working on improving Agrobacterium strains for better gene delivery into plants. They have created various modified strains to enhance transformation efficiency and reduce unwanted plasmid recombination. However, the naming of these strains can be confusing. The researchers have classified the strains and suggested improvements to the transformation process, such as bypassing plant defense responses. They have explored ways to increase transformation efficiency, reduce recombination, and improve containment. A modular system is recommended for successful plant transformation.