10 种茶藨子属植物导管分子形态特征及其生态适应性比较研究简

利用光学显微镜和扫描电子显微电镜，以10种茶藨子属植物为研究材料，观察了其导管分子的形态结构。结果显示：（1）所研究的茶藨子属植物导管分子穿孔板为梯状穿孔板，且穿孔板上横隔分布的数量不同，端壁倾斜角度种间变化不大；（2）导管分子纹孔式样为互列式或兼有互列式和对列式，纹孔形状种间存在差异；（3）有的种类导管分子内壁有螺纹加厚或网状凸起。研究表明，不同生境下的茶藨子属植物导管形态与其生态适应性之间有较强的相关性，表现为湿生环境的物种导管较短，直径较宽；旱生环境的物种导管较长，直径较小；中生环境的居中。本文分析了茶藨子属植物导管分子形态特征的生态适应性。

Comparative Study on Morphological Characteristics and Ecological Adaptability of Vessel Elements of Ten Ribes L. Varieties

The morphological structure of vessel elements of ten Ribes L. varieties were observed and studied by optical microscope and scanning electron microscopy (SEM). The results are as follows: (1) The perforations for vessel elements of the ten Ribes L. varieties are scalariform perforation plate, and the number of perforation plate bars is different while the angles of end wall are in the little change. (2) There are alternate pitting and both alternate pitting and opposite pitting, and the shape of pits are different. (3) In the inner wall of some vessel elements, there are spiral thickenings and nets embossment. The researches show that Ribes L. varieties under different habitats have strong correlation between morphological structure and its ecological adaptability. The results show that the vessel elements of hygrophilous species are shorter and wider in diameter, while the vessel element of the xerophytes species are longer and smaller in diameter and ones of mesial species are in the middle size in both length and diameter. The relationship between the morphological characteristics of vessel elements and their ecological adaptability was analyzed in this paper.