Effect of BA NAA and 2,4-D on Micropropagation of Jiaogulan (Gynostemma pentaphyllum Makino)

Shoots tips and axillary buds of Gynostemma pentaphyllum Makino were used as explants and cultured on MS medium supplemented with 0.05, 0.1 and 1.0 mg/l BA. After 12 weeks, new shoots came out and the MS medium contained with 1.0 mg/l BA gave the highest shoots (7.28 shoots) and their average height was 2.22 cm. Young leaves were used as explants for callus induction. Explants were cultured on MS supplemented with vary concentration of 2,4-D ( 0.1,0.5 and 1.0 mg/l ). After 12 weeks, explants on MS medium supplemented with 1.0 mg/l 2,4-D gave the biggest callus which their average diameter were 0.9375 cm. When cultured explants of Gynostemma pentaphyllum Makino on MS medium supplemented with combination of (0.05, 0.1, 1.0 and 2.0 mg/l) BA and (0.05, 0.1 and 1.0 mg/l) NAA for 12 weeks. The highest average new shoots were induced from MS medium supplemented with 1.0 mg/l BA and 0.1 mg/l NAA which was 6.8 shoots, and MS medium supplemented with 2.0 mg/l BA and 0.05 mg/l NAA gave the lowest average new shoots (2.7 shoots), and the average root length (1.8 cm). Plantlets were complete and ready for transplanting to in vivo.