Synergistic effect of polyamines on bulblet multiplication in Lilium sp (Asiatic hybrids)

摘要

The in vitro bulblet multiplication of Lilium sp. (Asiatic hybrids) enhanced significantly by the application of polyamines than when cultured on medium containing high sucrose and auxin (NAA). Of the two polyamines tested, spermine was most effective. Maximum multiplication fold was 2.89 for cultivar 'Gran Paradiso' at 150 #mu#M spermine and 2.78 fold for cultivar 'Sanciro' at 50 #mu#M. Putrescine also stimulated bulblet formation and multiplication to the tune of 2.56 and 2.61 fold at 50 #mu#M as compared to control where it was 2.13 and 2.42 fold for cultvars 'Gran Paradiso' and 'Sanciro', respectively. Though polyamines were effective in enhancing multiplication rates on an average of 26% in a year, growth of bulblets remained unaffected.