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贵州苏铁根的解剖学研究
引用本文:艾素云,黄玉源,伍映辉. 贵州苏铁根的解剖学研究[J]. 云南植物研究, 2006, 28(2): 149-156
作者姓名:艾素云  黄玉源  伍映辉
作者单位:1. 广西大学农学院,广西,南宁,530005
2. 广西大学农学院,广西,南宁,530005;仲恺农业技术学院,广东,广州,510225
摘    要:对贵州苏铁(Cycas guizhouensis K.M.Lan et R.F.Zou)的根进行了解剖学研究,结果表明:(1)据外部形态和内部结构不同,贵州苏铁的根可分为正常根、珊瑚状根和肉质根三种类型。(2)正常根与肉质根的木栓形成层起源于表皮内方第1~2层皮层薄壁细胞,珊瑚状根的木栓形成层则起源于外方皮层的第2~3层细胞,而非中柱鞘。(3)首次发现肉质根一种新的增粗方式,是由周皮内方的皮层薄壁细胞恢复分裂能力,持续或周期性产生新的皮层薄壁细胞,引起根的增粗。

关 键 词:贵州苏铁    解剖学研究
文章编号:0253-2700(2006)02-149-08
收稿时间:2005-07-11
修稿时间:2005-07-11

Study on Anatomy of the Root of Cycas guizhouensis (Cycadaceae)
AI Su-Yun,HUANG Yu-Yuan,WU Ying-Hui. Study on Anatomy of the Root of Cycas guizhouensis (Cycadaceae)[J]. Acta Botanica Yunnanica, 2006, 28(2): 149-156
Authors:AI Su-Yun  HUANG Yu-Yuan  WU Ying-Hui
Affiliation:1 Agricultural College, Guangxi University, Nanning 530005, China; 2 Zhongkai Agricultural College, Guangzhou 510225, China
Abstract:The root anatomy of Cycas guizhouensis has been investigated. The result demonstrated that the roots may be divided into three types, normal, coralline and fleshy ones, according to their morphology and anatomy. The phellogen of normal and fleshy roots were derived from the first and second parenchyma cell-layers of epidermis inside, whereas that of coralline root came from the second and third cortical layer cells below epidermis.
Keywords:Cycas guizhouensis   Root   Anatomical structure
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