Chemotaxonomic studies ofAsplenium sect.Hymenasplenium (Aspleniaceae) |
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Authors: | Noriaki Murakami Shin-Ichi Hatanaka |
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Institution: | (1) Department of Biology, College of Arts and Sciences, University of Tokyo, Komaba, Meguro-ku, 153 Tokyo;(2) Present address: Botanical Gardens, Nikko, Faculty of Science, University of Tokyo, Hanaishi-cho 1842, 321-14 Nikko, Tochigi |
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Abstract: | We previously isolated and characterized a new free amino acid withd-configuration at the α-carbon,trans-3, 4-dehydro-d-2-aminopimelic acid and its related amino acids,d-2-aminopimelic acid and 4-hydroxy-l-2-aminopimelic acid fromAsplenium unilaterale. In this paper, we report that the biosynthetic relationshps among these three amino acids were studied using14C-and3H-labeled compounds as tracers. Glutamate and aspartate were shown to be good precursors and it was suggested that 4-hydroxy-l-2-aminopimelic acid is biosynthesized first and the twod-amino acids are derived from it. Furthermore, the distribution patterns of these non-protein amino acids inAsplenium sect.Hymenasplenium were examined in detail and they were evaluated by their biosynthetic pathway. Morphological characters especially on their
rhizomes were also examined and their character phylogeny was determined by outgroup comparison. Taking all the characters
available into account, the phylogenetic relationship among 7 species ofAsplenium sect.Hymenasplenium in Japan and Taiwan is discussed by the transformed cladistic method. |
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Keywords: | Aspleniaceae Asplenium sect Hymenasplenium Biosynthesis Chemotaxonomy Cladistics Non-protein amino acid |
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