Abstract
Effects of N6-benzyladenine (BA) or thidiazuron (TDZ) on adventitious shoot regeneration and axillary shoot multiplication of Sedum sarmentosum was investigated. Leaf and shoot tip explants obtained from in vitro-grown shoots of S. sarmentosum were cultured on Murashige and Skoog (MS) medium supplemented with 0, 2.0, 4.0 or 8.0 µM BA or TDZ. Of the two cytokinins studied, BA was found to be more responsive as compared to TDZ with respect to number of shoots produced per explant. High frequency of shoot regeneration (92.2%) with a mean of 12.3 shoots was produced when the leaf explants were cultured on MS medium supplemented with 8.0 µM BA. The highest number of shoots (25.4) was obtained when shoot tip explants were cultured on MS medium devoid of cytokinins after 35 days of culture. For root induction, regenerated shoots were cultured on MS medium supplemented with 0, 2.0, 4.0 or 8.0 µM indole-3-acetic acid (IAA), indole-3-butyric acid (IBA) or α-naphthaleneacetic acid (NAA). The highest number of (17.6) roots per shoot was obtained on MS medium supplemented with 2.0 µM IBA after 30 days of culture. Regenerated plantlets were successfully acclimatized in the greenhouse with 100% survival rate.
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