Abstract
Dysosma pleiantha (Hance) Woodson is one of the endangered traditional Chinese medicinal herbs, highly valued for its medicinal properties by Taiwan's mountain tribes. The present study aims to develop an efficient protocol for callus biomass by optimizing suitable culture medium, carbon source culture condition, and enhanced production of pharmaceutically important podophyllotoxin, kaempferol, and quercetin from callus culture of D. pleiantha under the influence of different additives. Best callus induction was achieved in Gamborg's medium (B5) with 1 mg/L 2,4-dichlorophenoxyacetic acid (2,4-D) along with 0.2 mg/L kinetin under dark condition. Tender leaves of D. pleiantha showed the maximum of 86% callus induction among the different explants tested. Highest leaf callus proliferation was noted in B5 medium with 1 mg/L 2,4-D incubated under complete darkness. In addition, it was found that B5 medium with 1 mg/L 2,4-D along with 2 g/L peptone produced more leaf callus biomass and enhanced production of podophyllotoxin (16.3-fold), kaempferol (12.39-fold), and quercetin (5.03-fold) compared to control. Therefore, D. pleiantha callogenesis can provide an alternative source for enhanced production of secondary compounds regardless of the exploitation of its natural plant population.
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