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植物研究 ›› 1994, Vol. 14 ›› Issue (3): 306-312.

• 论文 • 上一篇    下一篇

杨柳科(Salicaceae)7种植物次生韧皮部的比较研究

刘东华1, 高信曾2, 陈耀堂2   

  1. 1. 天津师范大学生物系, 天津 300074;
    2. 北京大学生命科学院, 植物分子和发育生物学系, 北京 100871
  • 收稿日期:1994-01-01 出版日期:1994-09-15 发布日期:2016-06-14
  • 基金资助:
    国家自然科学基金资助项目

COMPARATIVE STUDIES ON SECONDARY PHLOEM OF 7 SPECIES IN SALICACEAE

Liu Dong-hua1, Gao Xin-zeng2, Chen Yao-tang2   

  1. 1. Department of Biology, Tianjin Normal University, Tianjin 30074, China;
    2. Department of Plant Molecular andDevelopmental Biology, College of Life Sciences, Peking University, Beijing 100871
  • Received:1994-01-01 Online:1994-09-15 Published:2016-06-14

摘要: 本文研究和比较了杨柳科2属7种植物次生韧皮部解剖结构。结果表明:(1)杨属和柳属植物在次生初皮部解剖上有某些共同特征:次生韧皮部具有明显分层现象;韧皮纤维和含晶细胞与筛管分子、伴胞和韧皮薄壁组织细胞是切向带相间排列;筛管分子均为复筛板,端壁倾斜平均含有7-8个筛域。(2)两属植物在射线和晶体类型上有明显区别:柳属植物次生韧皮部无石细胞;杨属植物不具功能韧皮部中含有石细胞。(3)两属植物均有一些较为原始的韧皮部解剖特征。

关键词: 杨柳科, 筛管分子, 射线, 韧皮部解剖, 晶体

Abstract: The comparative studies of the structure of secondary phloem in 7 species of 2 genera of Salicaceae is studied.The results showed:(1) Populus and Salix. in their anatomical structures of secondary phloem, exhibit some similar features:distinct stratification in the secondary phloem;phloem fibres and crystal-containing cells in tangential bands alternating with bands of sieve clements, companion cells and phloem parenchyma cells; and sieve elements with compound sieve plates and oblique end walls bearing 7 to 8 sieve areas.(2) There are obvious differences between them in type or ray cells and crystals. Sclereids were not found in secondary phloem in Salix. and they existed in non-conducting phloem of Populus. (3) Some phloem anatomical features of the two genera are more primitive in evolution.

Key words: Salicaceac, Sieve elements, Rays, Phloem anatomy, Crystals