Study on tissue culture of Bolbostemma paniculatum / 中国中药杂志

<p><b>OBJECTIVE</b>To study the method of callus induction and culturing of Bolbostemma paniculatum and its relationship with accumulation of tubeimoside.</p><p><b>METHOD</b>Stem and leaf were selected as explants. The effects of growth substances and their combinations at different concentrations on callus formation and propagation on MS and B5 basic medium were studied.</p><p><b>RESULT</b>The optimal compositions of medium that induced calli from stems and leaves were the MS medium supplemented with 2,4-D 2.0 mg x L(-1), NAA 0.5 mg x L(-1) and BA 1.0 mg x L(-1) and the MS medium supplemented with 2,4-D 0.5 mg x L(-1) and NAA 2.0 mg x L(-1), respectively. The calli cultured on the MS medium supplemented with 2,4-D 2.0 mg x L(-1), NAA 0.5 mg x L(-1) and BA 1.0 mg x L(-1) were optimal for the accumulation of tubeimoside. A uniform and stable callus line could be formed from the calli cultured repeatedly on B5 medium supplemented with 2,4-D 2.0 mg x L(-1), NAA 0.5 mg x L(-1) and BA 1.0 mg x L(-1).</p><p><b>CONCLUSION</b>Using stem and leaf as explants, the method of the callus induction and culture of B. paniculatum was established and it could provide some references for the production of tubeimoside by tissue and cell culture.</p>

Gene Expression Analysis of a Late Embryogenesis Abundant Gene from Salvia miltiorrhiza Bunge / 中国生物工程杂志

According to the sequence of SmLEA gene,a DNA fragment of 1 038 bp upstream of the coding sequence of SmLEA gene was amplified by DNA walking with the genomic DNA of Salvia miltiorrhiz as the template.Sequence analysis showed that the fragment contained some putative cis-elements relating to abiotic stress,ABA,seed specific expression.So the S.miltiorrhiz seedings was treated with 100?mol/L ABA,200mmol/L NaCl,4℃,and subjected to dehydration.The real-time PCR showed that expression levels of SmLEA was increased obviously,which was in accordance with the sequence analysis.