Histology of Callogenesis in Diploid Bananas (Musa acuminata, AA Group) �Kluai Sa� and �Kluai Leb Mu Nang�

Abstract

Yellow compact calluses were induced from in vitro-grown shoot tips of diploid bananas (Musa acuminata, AA group) �Kluai Sa� and �Kluai Leb Mu Nang� on a modified Murashige and Skoog (MS) medium containing 100 mg/L malt extract, 50 mg/L proline, 50 mg/L cysteine, 100 mg/L glutamine, 1 mg/L biotin, 7 mg/L Dicamba and 2 mg/L TDZ. Green shoot buds were induced after transfer of the yellow compact calluses to the same MS medium but supplemented with 1 mg/L NAA and 3 mg/L BA and plant regeneration was achieved through organogenesis in callus cultures. Regenerated shoots were rooted on MS medium containing 0.2% activated charcoal but without plant growth regulators. Histological analysis revealed that calluses originated from small dense cells with well stained cytoplasm and nucleus typical of meristematic cells.