Agrobacterium tumefaciens A6 strain:A6 Genome sequencing. Agrobacterium tumefaciens A6 strain:A6

A. tumefaciens is a Gram-negative, soil-borne bacterium, which was identified as the causative agent of plant tumors called as crown gall more than one hundred years ago. A. tumefaciens is an alpha proteobacterium that belongs to the family of Rhizobiaceae and holds a close phylogenetic relationship with the nitrogen-fixing Rhizobium species. A. tumefaciens is parasitic and tumorigenic to host plants and a variety of plants have been reported to be naturally transformed by A. tumefaciens. This occurrence has made A. tumefaceins a great concern to agriculture and horticulture industries . A.tumefaciens causes crown gall tumors by transferring and integrating its oncogenic DNA fragment (T-DNA) into the genome of plant hosts. Inside the transformed host cells, the T-DNA genes are specifically expressed, redirecting the host to overproduce phytohormones leading to the formation of crown galls. In addition, the expression of T-DNA genes also directs the host to produce opines, which represent an exclusive nutrient source for A. tumefaciens . All the T-DNA genes have been shown to reside on the Ti plasmid. In A. tumefaciens, Ti plasmids are around 200 kb in length and generally classified based on opines synthesized. A. tumefaceins A6 is a octopine type strain isolated from plant tumors carrying unique characterizations.