Shoot and root culture of Hypericum perforatum L. transformed with Agrobacterium rhizogenes A4M70GUS
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Hairy root cultures of Hypericum perforatum were obtained following inoculation of aseptically germinated seedlings with A. rhizogenes strain A4M70GUS. Effect of sucrose on the growth and biomass production of hairy root cultures was investigated. Hairy root cultures spontaneously regenerated shoots buds from which a number of shoot culture clones was established. Transformed shoot cultures exhibited good shoot multiplication, elongation and rooting on a hormone-free woody plant medium. Plants regenerated from hairy roots were similar in appearance to the normal, nontransformed plants.