Anatomical adaptations of three species of Chinese xerophytes （Zygophyllaceae）  

作　　者：YANG Shu-min FURUKAWA Ikuo 

机构地区：[1]Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, 100091, P. R. China [2]Faculty of Agriculture, Tottori University, Koyama, Tottori 680-8553, Japan

出　　处：《Journal of Forestry Research》2006年第3期247-251,共5页林业研究（英文版）

摘　　要：Secondary xylem characteristics and horizontal variations were described in three xerophytic species, Zygophyllum xanthoxylon, Nitraria tangutorum, Tetraena mongolica of Zygophyllaceae native to western China. All the species have obvious growth ring boundaries except sometimes discontinuous in T. mongolica and Z xanthoxylum ring to semi-ring-porosity; simple perforation plate; alternate intervessel pitting; non-septate fibres; paratracheal confluent axial parenchyrna; helical thickenings and heterocellular rays. However the vessel arrangement and quantitative features of vessels were different. Vessel elements tend to be shorter and narrower and more frequent in T. mongolica than in other two species that are hardly different could lead to greater conductive safety. The variation of vessel element length and fibre length along radial direction showed irregular tendency. There was significant difference in both fibre length and vessel element length among-tree and within-tree. Furthermore, the relationships between anatomical features and adaptability to desert environments were also discussed.第二等的木部特征和水平变化在三 xerophytic 种被描述， Zygophyllum xanthoxylon， Nitraria tangutorum，到西方的中国的蒺藜科土著人的 Tetraena 蒙古人集成通信适配器。所有种类让明显的生长除了，包围边界在 T 有时不连续。蒙古人集成通信适配器和 Z xanthoxylum 戒指到 semi-ring-porosity；简单穿孔板；轮流出现内部容器 pitting；非有中隔的纤维；帕拉气管的汇合的轴的实质；螺旋状的变厚和异种细胞的光线。然而，容器安排和容器的量的特征是不同的。容器元素趋于在 T 更短、更狭窄、更经常。蒙古人集成通信适配器能比在几乎不是不同的另外的二种导致更大的传导性的安全。沿着光线的方向的容器元素长度和纤维长度的变化显示出不规则的趋势。在两纤维长度和容器元素长度在树之中和在内树有重要差别。而且，在到荒芜的环境的解剖特征和适应性之间的关系也被讨论。

关 键 词：Anatomical adaptations Horizontal variations Xerophytes Zygophyllaceae 

分 类 号：S781.1[农业科学—木材科学与技术]