新疆四种补血草属植物叶片的解剖学研究

Study on the anatomy structure of blades of four Limonium species

关键词:  新疆  补血草属  叶片解剖

Key words:  Xinjiang  Limonium  blade anatomy

摘要:

利用叶片离析法和石蜡切片法研究了补血草属4种植物叶片的形态结构。结果表明:(1)4种植物的叶片有许多共同的结构适应特征,表皮细胞排列紧密,表面有厚的角质层; 气孔类型均为不等型,气孔位置为平置或略微下陷; 上下表皮还具有多细胞构成的盐腺; 栅栏组织发达,多为等面叶; 存在粘液细胞和单宁细胞; 机械组织和维管组织都不发达等。(2)不同种间有不同的结构适应特征,如表皮细胞的形状、大小、垂周壁饰样,气孔密度,盐腺密度,叶片厚度和栅栏组织厚度等。通过叶的结构特征反映出盐生植物与旱生植物的不同。

Abstract:

Anatomy structure of blades of four Limonium species were studied by using blade segregation and paraffin method. The results are as follows:(1)These blades of four species have many identically structural adaptations:epidermis cells have thick cuticle. The type of stomata is anisocytic one,stomata are at the same level as epidermis cells,sometimes even lower. There are glands which consist of several cells in upper and lower epidermis; flourishing palisade tissue,most of them are equilateral; existing mucilage cells and tannin idioblasts; have less vascular tissue and mechanical tissue.(2)Different plants have different adaptional features. There are differences in the shape,the form of radical wall and the area of epidermis cell as well as stomata frequency,the salt gland frequency,the thickness of blade and that of palisade. Leaves of halophytes have differently structural characteristics compared with those of xerophytes.