九种海滨沙生植物解剖构造及其生态适应性研究

利用常规石蜡制片法，对生长于北戴河海滨沙地的9种沙生植物的营养器官的形态结构进行比较观察。结果表明：(1)叶结构出现各种旱生和盐生植物特征，如一些植物叶的栅栏组织发达，海绵组织退化；多数植物的叶片较小；多数植物支脉和侧脉多等；(2)轴器官具有发达的表皮和机械组织，有异常结构的出现。说明北戴河海滨沙滩生长的9种植物的营养器官存在一系列的旱生结构特征，这些结构在减少蒸腾作用，增强光合作用，储存水分，增强器官的机械强度方面具有积极的作用。

Anatomical structures and ecological adaptability research of nine species of psammophytes on beach

The morphology and anatomy of vegetative organs of psammophytes of 9 species on Beidaihe beach was studied using traditional paraffin section. The results were as follows:(1)The leaves showed the features of xerophil,for instance,palisade tissues were very developed,while their spongy tissues degenerated in some plants; The leaves of the most plants showed very small and has more ramificate vein;(2)The axial organs had more developed epidermis and strong mechanical tissue,and abnormal structures appeared. These results suggested that vegetative organs of psammophytes on Beidaihe beach showed a series of xeric structures. These features of structure had a positive effect on reducing transpiration,boosting up photosynthesis,saving up water,enhancing strength of organs.