Molecular Analysis of Agrobacterium tumefaciens Transformed Strains with Commercially Available Plasmid DNA Miniprep Kits.

The verification of Agrobacterium clones is a crucial step in molecular biology research, traditionally relying on bacterial culture endpoint PCR. However, this method is susceptible to contamination and false-negative/positive results. The existing methods focus on confirming DNA sequences and frequently overlook plasmid acceptance. This study presents an innovative and efficient approach that employs available commercial kits to isolate Agrobacterium tumefaciens (GV3101) plasmid DNA. This method includes slight modification of the standard kit protocol during the washing step, enhancing efficient plasmid retrieval. Despite lower yields, the recovered DNA allows PCR and enzymatic digestion, providing conclusive evidence of plasmid acceptance.