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Selection of hairy root clones of Artemisia annua L. for artemisinin production

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Hairy roots were induced from two kinds of explants and selection of hairy root clones was studied for artemisin in production. Leaf blade pieces and petiole segments of Artemisia annua plantlets were infected with Agrobacterium rhizogenesstrain 1601. The efficiency of leaf blade pieces forming hairy roots was higher than that of petiole segments. Light promoted hairy root induction and branching. Two hundred and twenty hairy root clones showed considerable variations in capacity of growth and branching. Six hairy root clones were established in suspension culture and showed obvious differences in their biomass and artemisin in content. Among six clones, clone 1601-L-3 produced the highest biomass, more than 70 times the inoculum, while clone 1601-L-1 gave the lowest biomass. The artemisin in content of clone 1601-L-1 was the highest, 1.195 mg/g DW, and this line yielded the highest artemisinin level of 9.08 mg/L.

Affiliations: 1: Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China ; 2: Biotechnology Research Center, Chinese Academy of Agriculture Sciences, Beijing, 100081, China


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