单瘤酸模根-茎转换区初生维管组织的解剖学研究

植物研究 ›› 1999, Vol. 19 ›› Issue (4): 397-400.

单瘤酸模根-茎转换区初生维管组织的解剖学研究

初敬华¹, 何显², 范淑琴²

1. 白城师专生物系, 白城 137000;
2. 东北师范大学生物系, 长春 130024

收稿日期:1999-03-09 出版日期:1999-12-15 发布日期:2016-06-14

ANATOMICAL STUDY ON THE TRANSITION OF PRIMARY VASCULAR TISSUE BETWEEN ROOT AND STEM OF RUMEX CRISPUS VAR. UNICALLOSUS

Chu Jing-hua¹, He Xian², Fan Shu-qin²

1. Department of Biology, Baicheng Normal Training School Baicheng, Jilin 137000;
2. Department of Biology, Northeast Normal University ChangChun, Jilin 130024

Received:1999-03-09 Online:1999-12-15 Published:2016-06-14

摘要/Abstract

摘要： 作者在对单瘤酸模(Rumexcrispusvar.unicallosus)幼苗维管组织做连续切片的解剖观察时看到,该植物维管组织从根到茎的变化过程中出现4个不同的中柱类型,即①根-下胚轴的三元型星状中柱;②子叶节区下部的单体型原生中柱;③子叶节区上部的管状中柱和④上胚轴-苗端的真中柱。作者对此进行了讨论,认为子叶节区既然具有原始的单一管状类型的中柱,说明这一部位应为与古老植物轴性器官在现代植物体中的保留,因此根-茎间维管束的连接应从此区分别向上、下延伸。这一结果支持90年初提出的根-茎转换区的新理论:子叶节学说。虽然如此,作者还发现在于叶节区上部存在一个木质部呈环状排列的中柱类型,这个类型的形态及其出现的方式与管状中柱及其发生的"髓化"理论解释有极大的相似之处,而与子叶节学说有所不同。这表明,有关根-茎渡区的理论研究仍有许多工作尚待进行。

关键词: 单瘤酸模, 根－茎转换区, 子叶节学说

Abstract: In this anatomical study on vascular tissue of Rumex crispus var. unicallosus, authors found four types of vascular cylinder, from the root apex to the shoot apex, existing in the seedling of this plant:i. e. the type of actinostele which is triarch in the root; the type of haplostele in the lower part of cotyledon node zone; the type of siphonostele in the upper part of cotyledon node zone and the type of eustele in epicotyl-shoot zone. This result seems to support the CNZ theory proposed in 1990,because the haplostele, which is considered the most primitive type of vasular cylinder,exists in cotyledon node zone and there is a discussion about it here of. But the existence of siphonostele indicates a difference between CNZ theory and the conclusion done in this paper, and therefore the authors think it should be a problem deserving of some further study

Key words: Rumex crispus var. unicallosus, Root-stem transforming zone, CNZ theory

初敬华, 何显, 范淑琴. 单瘤酸模根-茎转换区初生维管组织的解剖学研究[J]. 植物研究, 1999, 19(4): 397-400.

Chu Jing-hua, He Xian, Fan Shu-qin. ANATOMICAL STUDY ON THE TRANSITION OF PRIMARY VASCULAR TISSUE BETWEEN ROOT AND STEM OF RUMEX CRISPUS VAR. UNICALLOSUS[J]. Bulletin of Botanical Research, 1999, 19(4): 397-400.