整合生物学期刊网

Plant Diversity ›› 1988, Vol. 10 ›› Issue (02): 1-3.

• 研究论文 •    

罗汉果营养器官的结构

张振珏 莫庭旭   

  1. 福建省亚热带植物研究所
  • 出版日期:1988-04-25 发布日期:1988-04-25

THE STRUCTURE OF NUTRITIVE ORGANS IN SIRAITIA GROSVENORII

Zhang Zhenjue, Mo Tingxu   

  1. Fujian Institute of Subtropical Botany, Xiamen
  • Online:1988-04-25 Published:1988-04-25

摘要: 1.罗汉果根、茎、叶的结构与葫芦科其它植物大致相似;不同之处有三方面:(1)叶子主脉中维管束为5个:(2)叶子中有硅质细胞成群分布;(3)块根具异常次生生长;在次生木质部中围绕导管形成形成层,由之分化出多个具韧皮部与木质部的小维管束。2.叶中的硅质细胞分布于表皮、栅栏组织、海绵组织中,多个细胞集合在一起。其细胞壁加厚并硅质化,细胞内容物消失。推测与增加叶子的支持力量有关。3.罗汉果雌株叶子上、下表皮气也数之比为0.04,雄株为0.03,比值均很低,同时根据叶的解剖结构推测罗汉果为C3植物。4.雌株叶子下表皮单位面积气孔数比雄株的多26%,差异很显著,值得进一步研究简化观察统计方法,以用于鉴别幼苗的性别。

关键词: 罗汉果, 营养器官, 药用植物

Abstract: The structure of roots, stems and leaves in Siraitia grosvenorii is roughly similar to that in other plants of Cucurbitaceae. Differences in three repects are observed: ( a ) There are five vascular bundles in the midribs of the leaves, ( b ) There exist groups of silica cells in leaves, ( c ) The root tubers show anomalous secondary growth. In secondary xylem, a series of supernumerary cambia form around the tracheary elements. Many small vascular bundles with xylem and phloem differentiate from the supernumerary cambia.

Key words: Siraitia grosvenorii