The strategy should produce similar results as transgenic strategy that involves fusing different protein modules or domains to get both auxin and GA responses when adding only auxin to rice.
maybe you have to specify your question. If you want to do what you plan, then you have also to use in vitro recombined DNA and then introduced it or the transcribed RNA into the cells/organisms you want to test it.
Possibly you are asking for transient transformation/ transfection as a short-term transgenic situation vs. the long-term establishment of (stable) transgenic lines.