From Agrobacterium tumefaciens, strain B6, a clone B6Ri could be isolated which grows well in presence of 150 ,ug/ml rifampicin. Moreover B6Ri does not alter the rifampicin in the medium (quantity, spectrum in visible light, ability to inhibit the growth of B6). B6Ri is able to induce crown-galls on leaves of Kalanchoe in the presence of 100 /^g/ml rifampicin. Therefore the rifampicin-mediated ...

Baccharis dracunculifolia, the host plant of the gall maker Neopelma baccharidis Burck., is locally distributed in delimited patches. The effects of the host plant individual (plant height, crown diameter, and crown volume), local (host plant patch), and regional (locality) characteristics on the number of galls were analyzed, in Viçosa (three patches) and in Rio Doce State Park, Marliéria (two...

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 ...

Several bacteria were evaluated in greenhouse studies for their effectiveness at preventing formation of galls induced by Rhizobium vitis, the Gram negative bacterium that causes crown gall disease of grapevines. Three endophytic bacteria isolated from Malus domestica yielded promising results and were selected for further examination: Pseudomonas fluorescens isolate 1100-6, Bacillus subtilis i...