9种日本当归属植物的果实形态特征研究
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四川大学建筑与环境学院

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国家自然科学基金(31400195)


Morphological Analysis on the Fruits of Nine Angelica L. Species of Japan
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The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

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    摘要:

    日本列岛是伞形科当归属重要的分布地和多样性中心之一,但过去对当归属的分类学和分子系统学研究较少涉及日本的物种。本研究对产自日本的9种当归属植物(特有种8种)的果实形态结构和表面微形态特征进行了观察和比较,梳理了它们的分类学特征,探讨了潜在的种间关系,为进一步的分类修订和系统发育研究提供资料和依据。本研究表明:(1)体式显微镜观察结果:果实形状主要为倒卵形和长圆形,表面光滑或少毛,呈不同程度的背腹压扁,背棱大多呈线状突起或狭翅状,侧棱则呈或宽或窄的翅状,油管一般为每个棱槽1条、合生面2-4条;(2)扫描电镜观察结果:大多数种类具有疏密不等的平行线形初级蜡质纹饰,次级纹饰呈现鳞状、束状、索状、丘状或不明显,个别可见珊瑚状或网格状基底,一般具有颗粒状附属物;(3)通过分析比较上述形态特征和鉴别要点,编制了分种检索表。总的来看,日本特有当归属植物的果实形态特征较丰富,能为种间分类和亲缘关系研究提供有力支持;在此基础上,结合中国当归属系统发育的研究成果,本文进一步探讨了日本特有当归属植物的系统位置及其与东亚大陆物种的亲缘关系。

    Abstract:

    The Japanese Islands is one of the important distribution areas and the diversity centers of the genus Angelica L. (Apiaceae), but previous research on the taxonomy and molecular systematics of Angelica seldom involved Japanese species. In this study, the fruits of 9 Angelica species (including 8 endemic species) from Japan were observed in morphology, anatomy and micro-morphology, respectively. It was revealed that (1) the result of observations using stereomicroscope: the fruit usually obovate and oblong in shape, glabrous or a little pubescent on surface, dorsal-compressed variously, dorsal ribs filiform or narrow-winged, lateral ribs narrow- or wide-winged, vittae 1 in each furrow and 2-4 in commissure; (2) the result of SEM: most of species had parallel filiform primary ornamentations and squamous, bunchy, cord-like, hummocky or unobvious secondary ornamentations, some contained coralloid or radicular background, and appendages were granular generally; (3) the classification key for those Japanese Angelica species, which was organized based on the above morphological characteristics and distinguishing features. Totally, the endemic Angelica species of Japan presented abundance of fruit features in morphology, probably providing strong evidence for their interspecies classification and relationships. Furthermore, this research, combined with the results of systematic studies on the Chinese Angelica genus, also proposed the potential phylogenetic position of Japanese endemic species and the relationships with their relatives in East Asian mainland.

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  • 收稿日期:2019-08-01
  • 最后修改日期:2019-10-16
  • 录用日期:2019-10-15
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