Inhibition of tumor induction in tobacco by Agrobacterium tumefaciens and nodulation induced by Rhizobium meliloti in the presence of phenothiazines and structurally related compounds.
Plasmids of Agrobacterium tumefaciens and Rhizobium meliloti carrying Kanamycin resistance genes were eliminated from 1.4 to 0.2% of the growing bacterial cultures by promethazine and imipramine. As a result of plasmid elimination, the A. tumefaciens plasmidless isolate was not able to induce crown gall tumor on tobacco plants. The plasmidless R. meliloti strain failed to induce nodule formation on alfalfa plants. The efficiency of nodulation was decreased when the bacteria were grown in the presence of the drugs. The antiplasmid effects of the drugs were not prevented by opines, (nopaline and octopine) in Escherichia coli F'lac cells.
Szabo
M
M
Department of Plant Physiology, Attila József University, Szeged, Hungary.
Molnar
J
J
Bánfalvi
Z
Z
Motohashi
N
N
D016960:Agrobacterium tumefaciens / Q000187:drug effects* / Q000472:pathogenicity; D007099:Imipramine / Q000494:pharmacology; D010640:Phenothiazines / Q000494:pharmacology*; D010941:Plant Tumors; D010947:Plants, Toxic; D011398:Promethazine / Q000494:pharmacology; D016962:Sinorhizobium meliloti / Q000187:drug effects* / Q000502:physiology; D013329:Structure-Activity Relationship; D014026:Nicotiana
D010640:Phenothiazines; D011398:Promethazine; D007099:Imipramine