Agrobacterium tumefaciens, crown gall

Agrobacterium radiobacter Agrocin 84 Agrohacteriwn tumefaciens Stonefruit. Roses Crown Gall 114... 

The vectors used routinely to produce transgenic plants are derived from the soil bacterium Agrobacterium tumefaciens. In its natural form, this bacterium causes the crown gall disease in which the infected plant produces tumors ( galls ) usually at the base ( crown ) of the plant. 

Figure 13. Agrobacterium tumefaciens, the natural transformation system for plants. The bacterium contains a circular piece of DNA, the Ti-plasmid. The bacterium infects a dicotyledonous plant and transfers the T-DNA from the Ti-plasmid to the plant chromosomal DNA causing a tumor to form. The tumor is called a "crown gall". The gall, or teratoma, can be removed from the plant and placed into culture on medium without exogenous hormones.

Figure 6.33. Tumors in Plants. Crown gall, a plant tumor, is caused by a bacterium Agrobacterium tumefaciens) that carries a tumor-inducing plasmid (Ti plasmid). 

Recently, a fucose-specific lectin associated with the bacterial surface of Rhizobium lupinii has been purified, but its role in the interactions between the bacteria and the lupin root has not been established [114]. A fucose-specific lectin has also been isolated from the cell walls of Agrobacterium tumefaciens, a bacterium belonging to the Rhizobiaceaea family which infects dicotyledonous plants and forms crown gall [115]. 

C18H33O19P 584.421 Revised struct., originally assigned as the sucros-6-yl isomer. Produced in crown gall tumours by Agrobacterium tumefaciens. 

C17H31O18P 554.395 Produced in crown gall tumours incited by nopaline strains of Agrobacterium tumefaciens. Amorph. solid (as Na salt). [a]o +47.9 (c, 1 in H2O) (Na salt). 

C11H21O13P 392.253 Prod, in crown gall tumours induced by nopaline strains of Agrobacterium tumefaciens. 

Constit. of the disaccharide from the culture media of the crown gall tumour inducing organism Agrobacterium tumefaciens. 

L-Tryptophan derivatives 3-Indoleacetic acid (D 21) Produced after infections by Agrobacterium tumefaciens, causes uncontrolled cell divisions (crown gall tumors) in the host plants... 

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