Abstract
In the present study, we developed a simple transient gene expression system based on Agrobacterium-mediated transformation. Vacuum infiltration was applied to leaf discs from Nicotiana benthamiana plants with Agrobacterium suspension solution under conventional vacuum conditions in a needleless plastic syringe. Model proteins, green fluorescent protein, β-glucuronidase, mouse granulocyte-macrophage colony-stimulating factor, and human fibroblast growth factor 1 were successfully expressed in leaf discs within 4 days after infiltration. In addition, the functional evaluation of viral RNA silencing suppressors, Artichoke mottled crinkle virus p19 protein, was also performed. Using this method, the contamination and diffusion of genetically modified bacterium to the environment and important transgenic plants were prevented. This method can be conducted without specialized apparatuses or large amounts of Agrobacterium suspension solutions; thus, the simultaneous evaluation of multiple vectors will be easily possible.
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