P-1 Ligularia dictyoneuraの成分および遺伝子多様性と分布(ポスター発表の部)

概要

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Ligularia dictyoneura was found to be extremely diverse with respect to chemical composition, DNA sequence, as well as morphology. From 20 samples of the species, 17 eremophilane derivatives were isolated, including three new franoeremophilane derivatives, 3β-acetoxy-6β-angeloyloxyfuranoeremophilan-10β-ol (9), 1α-acetoxyfuranoeremophi lan-15, 6α-olide (11), and 6β-(2-hydroxymethylprop-2-enoyloxy)furanoeremophil-1(10)-ene (16). Seven types of chemical composition were identified in the 20 samples: one with non-furano eremophilane derivatives and the others (types 1-6) with furanoeremophilane derivatives of different oxidation levels (Table 1). Two distinct types were found for the DNA sequence of the atpB-rbcL intergenic region. The sequence of the ITSs region was also very diverse. The presence of two distinct types of the atpB-rbcL sequence and multiple ITS sequences within individuals suggests hybridization in the past. No correlation between the chemical composition and the DNA sequence indicates the presence of complex mechanism in the evolution of L. dictyoneura. Our results on inter- and intra-specific diversity in Ligularia hitherto have shown that the genus is indeed continuing its rapid evolution and suggest that production of furano-compounds confers an ecological importance.
天然有機化合物討論会の論文
2007-08-24