中国菊科绢蒿属植物叶表皮特征观察

利用扫描电镜对17种绢蒿属植物叶表皮特征进行了观察。结果表明,该属植物叶表面有大量带状蜡质和表皮毛覆盖,在蜡质成分的外面分泌有盐分颗粒,表现出明显的旱生结构特征。表皮毛在种间无明显差异,而气孔器在保卫细胞形状和表面纹饰等特征组合方面存在较大差异,说明叶表皮气孔器特征对于绢蒿属植物的系统分类有参考价值。

Epidermal Characteristics of Seriphidium (Compositae) Leaves in China

The leaf epidermises of seventeen species belonging Seriphidium were observed with scanning electron microscope and the leaf surface of these species were founded to have great amounts of banded waxy substances on the outer surface of which there distributed salt grains and great numbers of epidermal hair,thereby presenting distinct exeric structural characteristics.The epidermal hair did not significantly differed among the species but the stomatal apparatuses differed much in guard cell and surface ornamentation,which indicated that the characteristics of epidermal stomata apparatuses were of high reference value for the classification of the plants in the genus.