Shoot buds were induced from tuber explants (1 cm cut pieces) on
Murashige and Skoog (MS) medium containing 44.4 M 6-benzyladenine (BA) and additives (283.8 M
ascorbic acid, 67.8 M adenine sulphate, 143.5 M arginine and 118.9 M citric acid). After excision of
newly formed shoots, explants were successively transferred to MS medium with 22.2 M BA and additives
for shoot multiplication up to three passages.