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木通科、大血藤科种子的研究,(1)种皮的扫描电镜观察

夏泉, 彭泽样   

  1. (兰州大学生物系,兰州)
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1989-07-10 发布日期:1989-07-10
  • 通讯作者: 夏泉

A Study on the Seed of Lardizabalaceae and Sargentodoxaceae, (1) A SEM Examination of Testa

Xia Quan, Peng Ze-Xiang   

  1. (Department of Biology, Lanzhou University, Lanzhou)
  • Received:1900-01-01 Revised:1900-01-01 Online:1989-07-10 Published:1989-07-10
  • Contact: Xia Quan

摘要:

利用种皮扫描特征进行分类学和系统演化研究,这在木通科,大血藤科研究中尚属 空白。本文就5属15种木通科植物及大血藤科植物的种皮进行了扫描电镜观察。  从种皮雕纹类型看,大血藤科与木通科存在很大差异。Akebia,Holboellia,Stauntonia属植物通常具条纹状种皮雕纹,Sinofranchetia属植物也具条纹状种皮雕纹,但其条纹上具众多疣状凸起,  在 形态上较特殊。Decaisnea属植物的种皮具嵌合型雕纹,这在木通科十分罕见。以上,进一步印证了Stapf等人关于大血藤科分类学处理的正确性,说明了Decaisnea属和Sinofranchetia属在木通科的孤立地位;以及Akebia,Holboellia,Stauntonia属之间较密切的亲缘关系。

关键词: 木通科, 大血藤科, 种皮, 亲缘关系

Abstract:

Testa SEM characters of Lardizabalaceae and Sargentodoxaceae have  not been
used in former studies of taxonomy and phylogeny.  In this work examined by scanning elec-
tron microscope (SEM).  was the testa surface of 5 genera including 15 species of Lardizaba-
laceae and Sargentodoxaceae.  Sargentodoxaceae is found quite different from Lardizabalaceae
in its smooth test.  The testa sculpture of Akebia, Holboellia and Stauntonia is   basically
striate, but that of Sinofranchetia, though striate, is verrucous on striations. Decaisnea is very
isolated for its mosaic testa sculpture.
     The tesa examination confirms the rationality of the taxonomic treatment of Sargentodoxa-
ceae by Stapf, the isolated taxonomic position of Decaisnea and Sinofranchetia in Lardizabala-
ceae, and the close interrelationship among Akebia, Holboellia, and Stauntonia.

Key words: Lardizabalaceae, Sargentodoxaceae, testa, relationship