The common soil bacteria Agrobacterium tumefaciens and Agrobacterium rhizogenes are unique genetic pathogens capable of fundamentally redirecting plant metabolism in order to generate macroscopic tissue masses (crown galls and hairy roots, respectively) which support the growth of large populations of Agrobacteria. Central to pathogenesis is the horizontal transfer of a suite of oncogenes from ...

Rosmarinus officinalis is one of the most important medicinal and aromatic plants around the world. Essential oil as a weapon against biotic and abiotic stresses plays an important role in essential oil bearing plants. In this study the essential oil content and constituent of plants containing bacterium-gall on the shoots and crown was compared with non-contaminated plants. Essential ...

Braunl-4 has clearly demonstrated that the transformation of normal plant cells into crown-gall tumor cells includes the progressive activation of enzyme systems which, once in operation, become a permanent part of the metabolic machinery of the altered cells. The work in our laboratory has paralleled that in Dr. Braun's with surprisingly similar results. We have, however, utilized a different ...

The sizes and relative map positions of RNA molecules encoded by the plasmid DNA of several octopine-type tobacco crown gall tumors were determined by blot hybridization. At least six discrete polyadenylylated RNAs (sizes 0.73-1.75 kilobases) were detected in octopine-producing tumors (lines A6S/2, E9, and 15955/01). In one tumor (line 15955/1) in which octopine could not be detected, one of th...