[1]尹增芳,樊汝汶,黄金生.美洲黑杨维管形成层活动周期性及细胞超微结构的动态变化[J].南京林业大学学报(自然科学版),2006,30(06):001-6.[doi:10.3969/j.jssn.1000-2006.2006.06.001]
 YIN Zeng-fang,FAN Ru-wen,HUANG Jin-sheng.Periodicity of Vascular Cambial Activity and Dynamic Changes of Cell Ultrastructure in Populus deltoides[J].Journal of Nanjing Forestry University(Natural Science Edition),2006,30(06):001-6.[doi:10.3969/j.jssn.1000-2006.2006.06.001]
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美洲黑杨维管形成层活动周期性及细胞超微结构的动态变化
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《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

卷:
30
期数:
2006年06期
页码:
001-6
栏目:
研究论文
出版日期:
2006-06-20

文章信息/Info

Title:
Periodicity of Vascular Cambial Activity and Dynamic Changes of Cell Ultrastructure in Populus deltoides
文章编号:
1000-2006(2006)06-0001-06
作者:
尹增芳樊汝汶黄金生
南京林业大学森林资源与环境学院, 江苏 南京 210037
Author(s):
YIN Zeng-fang FAN Ru-wen HUANG Jin-sheng
College of Forest Resources and Environment Nanjing Forestry University, Nanjing 210037, China
关键词:
美洲黑杨 维管形成层 周期性 超微结构
Keywords:
Populus deltoides Vascular cambium Periodicity Ultrastructure
分类号:
S718
DOI:
10.3969/j.jssn.1000-2006.2006.06.001
文献标志码:
A
摘要:
<正>通过对南京栖霞山风景林群落的生态学调查以及土壤理化性状的测定,揭示了该群落的植物种类、多度、重要值等生态学特征和土壤的肥力特性,在此基础上提出栖霞山风景林资源的合理利用和保护措施。
Abstract:
The periodicity of vascular cambial activity in Populus deltoides could be divided into four stages: dormant, renewed active, active and transformed stages. In the dormant stage, the vascular cambium was composed of three layer cells. The cell had a thicker wall than the usual cambial cell, and also had a lot of small vesicles containing some substances that had higher electronic density. The dissociative ribsomes were abundant in the cytoplasm. Pellet-shaped lipid grains spread among the vesicles. Most of smooth endoplasm reticulum (SER) looked like short pieces in cell, but the SER was reticulated near the cell wall. The cristae of mitochondria were not clear either. Usually, the Golgi body that was formed by 3~5 cisternaes was rare. There was no Golgi vesicle around the inactive Golgi body. In the renewed active stage, the cambial zone cell wall became much thinner, and the electronic density in cytoplasm was much lower because the substances involved in vacuole were disaggregated. In the active stage, the vascular cambial zone was composed of 7~8 layer cells. The cell wall was the thinnest one during the cambial activity period. At the same time, the cell was filled with vacuole mostly, and the cytoplasm and the nucleus were extruded beside the cell wall, or was overhang somewhere by cytoplasmic cable. The structure of organelle such as mitochondria, Golgi body, endoplasm reticulum in the cell was complete. There were plenty of plasmalemma invaginations in the cell, which was related to cell wall substances accumulation. In the transformed stage, the mitosis of vascular cambial cell ceased, and the cell wall became thicken again. The volume of vacuole decreased, but the amount of vacuoles increased. Synchronously, starch, lipid and protein began to accumulate in the cell. During the periodicity of vascular cambial activity, the ultrastructural character of dormant stage was opposite to that of active stage completely. However, the ultrastructural character of the renewed active looked like that of the transformed stage, it could be a reversible process.

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更新日期/Last Update: 2013-05-20