长叶红沙劈裂生长的形态发生及其内源激素含量变化

doi:10.3773/j.issn.1005-264x.2008.02.016

植物生态学报 ›› 2008, Vol. 32 ›› Issue (2): 385-391.DOI: 10.3773/j.issn.1005-264x.2008.02.016

长叶红沙劈裂生长的形态发生及其内源激素含量变化

杨瑞丽, 王迎春^*(), 常艳旭

内蒙古大学生命科学学院,呼和浩特 010021

收稿日期:2006-08-29 接受日期:2006-12-20 出版日期:2008-08-29 发布日期:2008-03-30
通讯作者: 王迎春
作者简介:* E-mail: yc.wang@263.net
基金资助:
国家自然科学基金项目(30060006);国家自然科学基金项目(30460033)

MORPHOGENESIS AND CHANGES IN ENDOGENOUS PHYTOHORMONES IN REAUMURIA TRIGYNA MAXIM DURING FISSURATE GROWTH

YANG Rui-Li, WANG Ying-Chun^*(), CHANG Yan-Xu

College of Life Sciences, Inner Mongolia University, Huhhot 010021, China

Received:2006-08-29 Accepted:2006-12-20 Online:2008-08-29 Published:2008-03-30
Contact: WANG Ying-Chun

摘要/Abstract

摘要：

研究荒漠旱生小灌木长叶红沙(Reaumuria trigyna)劈裂生长过程的形态发生及其内源激素含量的变化。结果表明:1)劈裂发生部位形成层活动不均匀,次生木质部的导管口径缩小, 数量减少,木纤维含量增多,由此向内形成缢缩,之后缢缩部位前端的细胞不断解体,使得缢缩不断加深, 相邻的两个缢缩部位通常要延伸到劈裂发生部位的中心位置连接在一起,整个维管束裂成多个单独的维管束,并相互分离。劈裂发生部位木质部中有异常的类似形成层的结构,木质部被几层扁平的细胞环分割成数轮,推测其与劈裂生长的发生密切相关。2)内源激素在长叶红沙不同部位含量不同,尤其在刚刚开始劈裂的过渡植株的劈裂发生部位IAA和ZR的积累量比根部大,可能共同调节这个部位细胞的生长和分裂,促进劈裂生长的发生。

关键词: 劈裂生长, 形态发生, 内源激素, 长叶红沙

Abstract:

Aims Many xerophilous plants in the West Erdos region of Inner Mongolia share the same vegetative reproduction, fissurate growth, which is an important adaptation to drought environments. There are few correlated studies of fissurate growth.
Methods We studied the morphogenesis of fissurate growth of Reaumuria trigyna by sequential slicing and determined changes in the content of ABA, IAA, GA₃ and ZR using ELISA (Enzyme-linked immunosorbent assay).
Important findings Fissurate growth started from the base of stem. During certain phases of growth, the cambium layer of this part was asymmetric and the vessels of secondary xylem became smaller and fewer, while the amount of xylem fiber increased. The constriction formed here. Then the cells gradually disintegrated and the constriction became deeper. One constriction connected with the next one when they extended to the center of the fissurate part. The entire vascular bundle split into many single vascular bundles, and they separated from each other. There was abnormal structure in the fissurate part of R. trigyna, as xylem was divided into several rings by several layers of flat living cells. This could play a role in fissurate growth. IAA and ZT were more concentrated in the fissurate part of transitional plants than in roots, which probably regulated and promoted the growth and splitting of cells in the fissurate part.

Key words: fissurate growth, morphogenesis, phytohormone, Reaumuria trigyna

杨瑞丽, 王迎春, 常艳旭. 长叶红沙劈裂生长的形态发生及其内源激素含量变化. 植物生态学报, 2008, 32(2): 385-391. DOI: 10.3773/j.issn.1005-264x.2008.02.016

YANG Rui-Li, WANG Ying-Chun, CHANG Yan-Xu. MORPHOGENESIS AND CHANGES IN ENDOGENOUS PHYTOHORMONES IN REAUMURIA TRIGYNA MAXIM DURING FISSURATE GROWTH. Chinese Journal of Plant Ecology, 2008, 32(2): 385-391. DOI: 10.3773/j.issn.1005-264x.2008.02.016

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链接本文: https://www.plant-ecology.com/CN/10.3773/j.issn.1005-264x.2008.02.016

https://www.plant-ecology.com/CN/Y2008/V32/I2/385

图/表 5

图1 长叶红沙劈裂生长的形态 ①劈裂发生部位,示缢缩部位 Fissurate part. Arrow shows the constriction (×100) ②劈裂发生部位,示两个相邻的缢缩部位Fissurate part. Arrows show the two connected constrictions(×100) ③劈裂发生部位,示缢缩部位Fissurate part, showing the constriction(×100) ④劈裂发生部位,示木质部被几层扁平的细胞分割成的环形结构Fissurate part. Arrow shows Xylem was divided into several rings by several layers of flat living cells(×100) ⑤劈裂发生部位,示木质部中几层扁平的类似形成层的细胞 Fissurate part. Arrow shows several layers of flat living cells in xylem(×200) ⑥劈裂发生部位,示把木质部环分割成数轮的扁平细胞在劈裂发生过程中的活动Fissurate part. Arrow shows the effect of flat living cells on fissurate growth(×100)

Fig.1 Anatomy of fissurate growth of Reaumuria trigyna

图2 长叶红沙体内ABA含量的变化

Fig.2 Changes of ABA content in Reaumuria trigyna

图3 长叶红沙体内IAA含量的变化 A、B、C: 同图2 See Fig. 2

Fig.3 Changes of IAA content in Reaumuria trigyna

图4 长叶红沙体内ZT含量的变化 A、B、C: 同图2

Fig.4 Changes of ZT content in Reaumuria trigyna A、B、C: See Fig. 2

图5 长叶红沙体内GA3含量的变化 A、B、C:同图2 See Fig. 2

Fig.5 Changes of GA3 content in Reaumuria trigyna

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长叶红沙劈裂生长的形态发生及其内源激素含量变化

MORPHOGENESIS AND CHANGES IN ENDOGENOUS PHYTOHORMONES IN REAUMURIA TRIGYNA MAXIM DURING FISSURATE GROWTH

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