Macropropagation of banana - Effect of bio-fertilizers and plant hormones
Sajith, K.P. | Uma, S. | Saraswathi, M.S. | Backiyarani, S. | Durai, P.
Stimulation of lateral bud development and plantlet production is generally accomplished through decapitation methods in banana. Attempts were made in the present study to enhance the efficacy of decortication in elite cv. Bangladesh Malbhog using additives like bio-fertilizers and plant growth hormones. This trial was carried out with suckers weighing 1.0–1.5 kg and sawdust as substrate. All treatments tested, showed good response in terms of plantlet production and enhanced bud proliferation, growth and better root profiles compared to control. Treatment T₁₁ (Bacillus subtilis + BAP) produced the maximum number of primary buds (3.77) followed by T₃ (Trichoderma viride) and T₆ (AMF + T. viride) with 3.50 and 3.47 buds respectively as compared to control (2.03 buds). Secondary bud production was also observed higher in treatment T₁₁ with 5.70 buds per sucker followedby treatments T₃ and T₆ with 4.70 and 4.57, respectively. As far as tertiary bud production was compared, T₁₁ gave the highest of 7.33 buds followed by T₃ (7.20) and T₆ (6.70) with a least of 3.33 buds in control. Addition of IBA and Azospirillum (T₇) were observed to have good response in terms of root formation and enhanced bud regeneration (5.77 tertiary buds). Total number of buds produced was also observed highest in T₁₁ (16.80) followed by T₃ (15.40) and T₆ (14.73) suggesting that treatment combinations, B. subtilis + BAP and AMF + T. viride, were effective for macropropagation of cv. Bangladesh Malbhog.
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