贵州樟属四种药用植物内果皮,种皮微形态特征

本文借助扫描电镜，对贵州樟属的米杭Ｃｉｎｎａｍｏｎｕｍ ｍｉｇｏ Ｈ．Ｗ．Ｌｉ．云南樟Ｃ．ｇｌａｎｄｕｌｉｆｅｒｍ（ｗａｌｌ）Ｎｅｓｓ、梓Ｃ．ｃｏｐｈｏｒａ（ＯＬ．）ｐｒｅｓｌ、猴樟Ｃ．ｂｏｄｉｎｉｒｉ Ｌｅｖｌ。等四种植物的内果皮、种皮表面形态进行了比较观察。首次提出了鉴别这四种药材（果实）的微形态特征，并根据其形态差异进行了归类。为药材鉴别和樟属植物的分类提供科学资料。     

Anatomical structure and ultrastructure of the endocarp cell walls of Argania spinosa (L.) Skeels (Sapotaceae)

The anatomical and histochemical study of young and adult endocarps of Argania spinosa (sampled from Tindouf; Algeria) shows a general structure that is similar to that of majority of stone fruits. These samples consist of tissues that contain lignified and cellulosic cell walls. The majority of the tissues are composed of sclerenchyma cells; with very thick lignified cell walls and conducting tissues. Coniferyl lignins are abundant in the majority of the lignified tissues. However, the coniferyl lignins appear at the primary xylem during lignification. Syringyl lignins are present in small quantities. The electron microscopy observation of the sclerenchyma cell walls of the young endocarp shows polylamellate strates and, cellular microfibrils in arced patterns. This architecture is observed in the cell walls of the adult endocarp only after the incubation of the tissue in methylamine. These configurations (arcs) are the result of a regular and complete rotation with a 180° variation in the microfibril angle; the complete and symmetrical arcs show a helicoidal mode of construction. The observation of the sclerenchyma cells revealed the capacity of helicoidal morphogenesis to adjust itself under the influence of topological constraints, such as the presence of a large number of pit canals, which maintain symplastic transport.