| 不同生长条件下复叶槭生态型叶片显微形态特征的变化(英文) |
| |
| 引用本文： | 沈应柏,平立岩,骆有庆,陈华君,郝建华.不同生长条件下复叶槭生态型叶片显微形态特征的变化(英文)[J].中国林学,2001,3(1). |
| |
| 作者姓名： | 沈应柏 平立岩 骆有庆 陈华君 郝建华 |
| |
| 作者单位： | 1. 北京林业大学生物学院植物学系,北京,100083
2. 北京林业大学资源与环境学院,北京,100083 |
| |
| 摘 要： | 复叶槭 (AcernegundoLinn .)自 10 0年前从北美引种到中国 ,在内蒙古东部的生态交错带上 ,为了适应严酷的生存环境 ,形成了很多特殊的形态特征 .在不同的植被带生长的两个复叶槭生态型 ,其叶片并没有肉眼可见的差异 ,但它们的叶片显微形态特征却完全不同 .来自更加干旱温暖的种源的叶片具有更多的表皮毛、更多而小的气孔、更大的副卫细胞、更厚的栅栏组织 ,且其叶表角质层更加平滑 .来自干热地区种源的叶片显微特征有利于植物降低叶温、保持水分 .植物长期适应不同生存环境会形成具有不同叶部显微形态特征的生态型 ,当叶部显微形态特征用作植物分类的依据时应予以考虑 .
|
| 关 键 词： | 复叶槭 显微形态特征 生态型 扫描电子显微镜 |
Leaf Micro-Morphology in Two Ecotypes of Ashleaf Maple Adaptated to Different Survival Environments |
| |
| Shen Yingbai,Ping Liyan,Luo Youqing,Chen Huajun,Hao Jianhua.Leaf Micro-Morphology in Two Ecotypes of Ashleaf Maple Adaptated to Different Survival Environments[J].Forestry Studies in China,2001,3(1). |
| |
| Authors: | Shen Yingbai Ping Liyan Luo Youqing Chen Huajun Hao Jianhua |
| |
| Institution: | Shen Yingbai ** Ping Liyan Luo Youqing Hao Jianhua Chen HuajunShen Yingbai,Ping Liyan,Luo Youqing,Chen Huajun. Institute of Plant Sciences,College of Biology,Beijing Forestry University,Beijing 100083,P. R. China Hao Jianhua. College of |
| |
| Abstract: | Through one hundred years of adaptation in China, The Acer negundo Linn. (as hlea f maple), originally grown in North America, has developed morphological charact er istics to cope the severe situation of its habitats. Two ecotypes from different vegetation belts in the ecotone of eastern Inner Mongolia Autonomous Region wer e detected. Although there was no macroscopic difference, contrasting micro-ch a racteristics had been observed between the two sources. The leaves from more dro ught and warmer zone were found with more trichomes, more and smaller stomata, l arger subsidiary cells, thicker palisade and flatter epidermal wax than those of leaves from the more humid and colder zone. Microstructures of the leaves from xeric sources can more effectively reduce leaf temperature and conserving water than those of mesic sources. Intra-species difference of the two ecotypes is th e result of adaptation in different environments. This should be considered when characteristics of foliage are used as characters of species in taxonomy. |
| |
| Keywords: | Acer negundo micro-morphology ecotype SEM |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
