Ri plasmid

Ri-Plasmid of R. rhizogenes

The root inducing (Ri) -plasmid of Rhizobium rhizogenes is a plasmid capable of undergoing horizontal gene transfer of its transfer DNA (T-DNA), upon contact with a plant host. The T-DNA of the Ri-plasmid affects the plant host in such a way, that gene expression is altered, especially in regard to phytohormonal balances, metabolism and certain phenotypical characteristics.

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