Abstract
The growth of root hairs from stems of Nicotiana tabacum and Spartium junceum was induced by Agrobacterium rhizogenes. Stem roots of Nicotiana contained nicotine and a second alkaloid, probably anabasein. Root hairs from stems of Spartium contained cytisine, N methylcytisine and anagyrine as major alkaloids. The alkaloid content of the tumors was 3-12 times higher than that of the respective healthy host tissue.

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