Abstract
DNA sequence analysis of rDNA internal transcribed spacer (ITS) and fluorescence melting curve analysis of LightCycler real-time polymerase chain reaction products were exploited for their applications in the authentication of the traditional Chinese medicinal plant Cimicifuga foetida from four substitutes: C. heracleifolia, C. dahurica, C. acerina, and C. simplex. According to the melting temperature--which is a function of the GC/AT ratio, length, and nucleotide sequences of the amplified product--C. foetida was differentiated from C. heracleifolia, C. dahurica, C. acerina, and C. simplex. Melting curve analysis offers a rapid and reliable method for the authentication of the traditional Chinese medicinal plant C. foetida.
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