Not all sugars are sweet for banana multiplication. In vitro multiplication, rooting, and acclimatization of banana as influenced by carbon source-concentration interactions
2014
Waman, Ajit Arun | Bohra, Pooja | Sathyanarayana, B. N.
Carbon sources have been considered as one of the most important factors for in vitro multiplication of excised tissues. The type and concentration of sugars are known to influence the success of any in vitro protocol. In the present investigation, the effect of four carbon sources (glucose, fructose, mannitol, and sucrose) used to supplement Murashige and Skoog medium at three concentrations (1, 2, and 3%) was studied with respect to in vitro multiplication, in vitro rooting, and hardening in ‘Silk’ banana. Fructose (2%) followed by sucrose (3%) were found to be most the congenial carbon sources for obtaining the highest shoot multiplication rates. Growth parameters were also found to be superior in the fructose-containing media; however, it performed poorly in terms of root induction. Whereas, medium containing sucrose (3%) supported 100% root induction of in vitro-derived shoots. Plantlets multiplied initially on glucose-containing (1 and 3%) and sucrose-containing (3%) media exhibited superior growth parameters after secondary hardening. We conclude that a change in the rooting media could improve the number of successfully hardened plants under ex vitro conditions. To our knowledge, this is the first report describing the effect of sugars on hardening-related parameters in AAB genome of banana and apparently on any variety of banana.
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