华北早三叠世—种石松植物——美丽肋木（Pleuromeia epicharis Wang Z.Q. & Wang L.X.）的原位大孢子中氨基酸分析

本文首次对早三叠世特征化石美丽肋木的原位大孢子进行D-、L-氨基酸对映体分析。其初步结果在D-型氨基酸异构体特征、氨基酸总量与现代石松大孢子的氨基酸组成方面一定的系统学关系：两者在氨基酸H值方面明显的区别可能系化石石松的埋藏环境的后生原因造成的。

Amino Acids from the In-situ Megaspores of Pleuomeia epicharis wang Z.Q. of Wang L.X. an Early Triatssic Lycopsid in North China

A preliminary analysis of amino acids has been extrocted by gas chromatography from the in -situ megsapores of a fossil lycosid Pleuromeio epicharis, which is one of the most didtinctive plante in the early Triassic florss in North China. In comporison with that of a mod-ern lycopsid, i.e. herbaceous Lycopodium, the result might be considered to be indigenous, at least in part, in its rather low totel quantity of amino acids conformable to the general trend of decreasing value with age, in a igher ratio between D-forms occurring in the fossil amino acid supporting to the conclusion that the L-amino acids might racemize with time into D-forms, and in certain similarly of amino acids composition that can berecognized from the results of the two samples, and so on. The riches of the acidic aromatic cluster in amino acids of the modern sample might be result of adoption to stronge acidific soil in which the plant lives. In contrary, the occurrence of more or less alkaloidal components in the fossil lycopsid in higher concentra-tion could be produced in reductive faphonomic condition, and probably, is not indigenous.