摘要：The nucleotide sequences of partial ferredoxin (Fd)-cDNAs (corresponding to the amino acid sequence of 22—87 in the total 97 amino acids of ferredoxin) were determined for Datura arborea , D. stramonium , D. metel , and related Datura plants. Non-synonymous substitutions were noted at 4 positions and a synonymous substitution was seen at position 82 (Gln [CAA] ( arborea ) vs. Gln [CAG] ( stramonium and metel )). The nucleotide sequence of Fd-cDNA may provide more detailed information regarding the relative taxonomic positions of plants than the amino acid sequence. However, Datura plants in the same section ( metel , fastuosa , and innoxia ) and of different varieties ( stramonium var. stramonium and stramonium var. tatula ) showed identical Fd-cDNA nucleotide sequences. This result suggests that there are very close relationships among the plants in each group.
关键词：Genus Datura;nucleotide sequence;cDNA protein chemotaxonomy;ferredoxin
