植物分类学报

• 研究论文 • 上一篇    下一篇

南五味子属(五味子科)的种子形态及其分类学意义

毕海燕,林祁,刘长江,赵建成   

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2002-11-10 发布日期:2002-11-10
  • 通讯作者: 毕海燕

Seed morphology of Kadsura Juss.(Schisandraceae) in relation to its taxonomic significance

BI Hai-Yan, LIN Qi, LIU Chang-Jiang, ZHAO Jian-Cheng   

  • Received:1900-01-01 Revised:1900-01-01 Online:2002-11-10 Published:2002-11-10
  • Contact: BI Hai-Yan

Abstract: Seed macromorphology and seed-coat micromorphology of 11 species of Kadsura (Schisandraceae) represented by 36 samples were observed under light microscope (LM) and scan- ning electron microscope (SEM). The seeds are reniform, ellipsoid, cordiform or reniform-oblate in shape. Under SEM the surface pattern of the seeds shows some variation among the species and three types have been observed, i.e. (1) Nearly Smooth, (2) Areolate and (3) Reticulate. In the type 1, the seed surface is nearly smooth. This type was found to occur in two species, viz. K. borneensis and K. lanceolata. In the type 2, the seed surface is areolate with prominent lumina and sunken muri. This type was found to occur in K. coccinea and K. verrucosa. In the type 3, the seed surface is reticulate with sunken lumina and prominent muri. This type is the commonest in the genus, occurring in seven species, viz. K. heteroclita, K. induta, K. japonica, K. oblongifo- lia, K. angustifolia, K. scandens and K. marmorata. Seed-coat micromorphological features seem to be quite constant within species and thus are of significant value in the delimitation of some species. Evidence from seed-coat micromorphological features supports the treatment of reducing K. polysperma and K. interior to K. heteroclita and of reducing K. longipedunculata to K. japoni- ca. Brief speculation on the evolutionary trend of the seed-coat micromorphological features in thegenus Kadsura is discussed.

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