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作 者 ：李超；葛伟娜；李明

期 刊 ：植物研究 2015年 35卷 2期 页码：161-164

关键词：石竹科；孩儿参属；叶表皮；形态特征；

Keywords:Caryophyllaceae, Pseudostellaria, epidermis, characteristics,

摘 要 ：采用光学显微镜，对中国孩儿参属6种植物的叶表皮微形态进行观察、统计并测量表皮细胞和气孔的大小和密度。结果表明：孩儿参属植物叶片上下表皮细胞形状均无规则，垂周壁波状或深波状。上表皮细胞大小在61.7×95.8 μm～115.3×179.3 μm，细胞密度约为76～158个·mm^-2；下表皮细胞大小在46.4×72.4 μm～91.9×150.4 μm，细胞密度约为104～287个/mm^-2。上表皮仅少数种类存在气孔器，下表皮均有气孔器，气孔器为无规则型，气孔密度约为30～143个·mm^-2，气孔大小在21.5×28.6 μm～30.4×47.2 μm，气孔指数为19.5～31.6。气孔椭圆形，两端有加厚。叶表皮特征表明孩儿参属与繁缕属较为近缘，为较进化的类群。

Abstract:We observed the leaf epidermis characteristics of six species from the genus Pseudostellaria in China under the light microscopy, measured and calculated the size and density of epidermal cell and stomata apparatus. The shapes of leaf epidermal cells are irregular, anticlines walls are repand or sinuate. The size of adaxial epidermis cell is about 61.7×95.8 μm-115.3×179.3 μm, the density is about 76-158 mm^-2, the size of abaxial epidermis cell is about 46.4×72.4 μm-91.9×150.4 μm, and the density is about 104-287 mm^-2. Most of species have stomata apparatus only on abaxial epidermis, the type of stomata apparatus is anomocytic, the density is about 30-143 mm^-2, and the size is about 21.5×28.6 μm-30.4×47.2 μm. The stomata index is about 19.5-31.6. Stomata is oblong and thickened at the ending parts. Pseudostellaria is related to Stellaria, and is a derived taxon.

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