The Influence of Growth Regulators on Root Induction in Vitro of the Musa Genus

The influence of growth regulators on the root induction of the Musa genus plants cultivated within in vitro conditions has been compared. The plant material used was the ‘Cavendish’ cultivar. Different concentratios of growth regulators (naphthaleneacetic acid, indole-3-acetic acid, 6-benzylaminopurine, 2.,4-dichlorophenoxyacetic acid) has been used and as control ones MS and half concentrated MS media without additon of growth regulators. The induced roots were evaluated in conditions in vitro and ex vitro. The amount and length of the roots were evaluated, as well as the capacity of absorption of the roots by conductivity was determined. The experiments have proven that the most roots are created by using naphthaleneacetic acid (5.4 μM), but the longest roots provide the control variant (MS medium). After 7 weeks of the transfer to ex vitro conditions the plants that were growing on medium with addition indole-3-acetic acid have the best vitality and root absorption.