Abstract
Alkaloid contents of Lycoris radiata at different cultivation places and time periods were investigated. Eleven known alkaloid compounds such as lycoricidine, hipppeastrine, O-demethyllycoramine, lycoricidinol, galanthine, lycorine, lycorenine, lycoramine, galanthamine, homolycorine and pretazettine and seven unknown compounds were identified and quantified from the bulbs of L. radiata. Total alkaloid contents ranged from 1.58 to 5.55 mg/g dry weight (DW) in one year old and 1.64 to 4.79 mg/g DW in two year old L. radiata. Lycorine was noticed as the highest concentration of the identified alkaloid compound (1.43 mg/g DW). Moreover 25 % of the total alkaloid contents were contributed by lycorine in each time period.