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Transformed cultures of Artemisia annua L. (Asteraceae) were established by the co-culture methodusing leaf segments of A. annua and Agrobacterium rhizogenes NCIB 8196 or MAFF 03-01724. The hairy root clones thus obtained grew vigorously on hormone-free medium, showing the typical transformed morphology. The genetic transformation of the root was proved by the opine assay. Normal root and shoot cultures...