Enhancement of Agrobacterium tumefaciens Infectivity by Mitomycin C
AUTOR(ES)
Heberlein, Gary T.
RESUMO
The ability of Agrobacterium tumefaciens to induce pinto leaf tumors may be enhanced two- to threefold after treatment with mitomycin C. The enhancement may be obtained with either lethal or nonlethal concentrations. With 10-min treatments, an optimal response was obtained with 0.005 μg of mitomycin C per ml in the absence of any change in the number of viable cells. Both the tumor induction process and the tumors induced by treated cultures appear qualitatively the same as controls. To account for these results, the antibiotic must increase the proportion of viable cells that will subsequently initiate tumors. One, or at most a few, random lesions in the bacterial chromosome seem to be the necessary requirement for this promotion. At mitomycin concentrations of 1 and 5 μg/ml, the ability of A. tumefaciens to initiate tumors is rapidly lost, indicating that a fairly intact bacterial chromosome is one of the essentials for the tumor induction process.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=276849Documentos Relacionados
- Enhancement of Agrobacterium tumefaciens Infectivity by Chlorpromazine Hydrochloride
- Photoreversible Ultraviolet Enhancement of Infectivity in Agrobacterium tumefaciens
- Characteristics of Agrobacterium tumefaciens Auxotrophic Mutant Infectivity
- Auxotrophic mutation and infectivity of Agrobacterium tumefaciens.
- Ultraviolet-Induced Changes in the Infectivity of Agrobacterium tumefaciens
