Figure 4 Number of foliage leaves and petiolar length produced from rhizome of ‘Bua Phuean’
on different media, A = MS basal medium, B = MS basal medium containing 0.1% activated charcoal, C = MS medium consisted of 2.5 mg/l BAP and D = MS medium supplemented with 2.5 mg/l BAP and 0.1% activated charcoal