Effect of IAA and IBA on In vitro Rooting of Banana (Musa paradisiaca) Cv.Grand Naine

The present study was undertaken to study the effect of different concentrations of growth regulators of IAA (indole-3-acetic acid) (0.0, 0.5 and 1.0 mg/l) and IBA (indole-3- butyric acid) (0.0, 0.5, 1.0 and 1.5 mg/l) and their interaction on rooting. Half strength MS medium was used for all treatments. Days to root induction varied with different concentration of IAA and IBA. The short duration were recorded by 0.5 mg/l IAA - 8.9 days and 1.5 mg/l IBA - 9.4 days and interaction of both 0.5 mg/l IAA + 1.5 mg/l IBA has given almost a week root induction (7.33) days. The highest numbers of roots were produced by treatment 0.5 mg/l IAA which was 6.2 and 7.8 at 15 and 30 DAI, respectively.1.5 mg/l IBA was produced 5.1 and 7.1 roots at 15 and 30 DAI respectively. In 0.5 mg/l IAA + 1.5 mg/l IBA combination was given 7.0 and 8.0 numbers of roots at 15 and 30 DAI respectively. In length of roots, it was observed that 0.5 mg/l IAA was produced longest root size, 5.7 and 6.7 cm at 15 and 30 DAI respectively. The same concentration of IBA produced 4.5 and 5.9 cm root length at 15 and 30 DAI respectively. In interaction, 0.5 mg/l IAA +0.5 mg/l IBA were produced 6.33 and 7.33 cm length in 15 and 30 DAI respectively.