Abstract
The DNA from tumors of Nicotiana glauca initiated by strains of Agrobacterium rhizogenes was shown to contain sequences that are homologous to the root-inducing (Ri) plasmid of the bacterium. Two independently established tumor lines contained a similar portion of the Ri-plasmid. The Ri-plasmid also hybridized to DNA fragments from uninfected N. glauca. A cosmid clone of the Ri-plasmid encompassing the region containing the Ri-plasmid sequences that are stably transferred to the plant also hybridized to the Ri-plasmid-related fragments found in uninfected plants. Five of six tumor lines tested produced a tumor-specific compound that is similar to agropine.
Keywords: hairy root, plant tumorigenesis, root-inducing plasmid
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Selected References
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