Plant growth regulators in polyamines endogenous levels during the development of taro cultivated in vitro

The present research investigated the asepsis for attainment of explants deriving of tubers and the polyamines espermidine and espermine exogenous effects associated with the plant growth regulators NAA and BA on the development and tuberization in vitro and the endogenous levels of putrescine (Put), spermidine (Spd) and spermine (Spm) of taro (Colocasia escutenta). Plants grown in the medium with spermidine and spermine showed tuberization and the association of these polyamines with NAA and BA increases number of shoots. Plant growth regulators were not necessary, for root initiation. High levels of endogenous Put were found during the shoot emission. while high levels Spd were observed during in vitro root formation.