中国大蒜芥属(十字花科)叶表皮微形态学研究

利用光学显微镜观察了中国十字花科大蒜芥属9种1变种植物的叶表皮形态。结果表明：中国大蒜芥属植物叶上表皮细胞通常为多边形，垂周壁平直或弓形，少有稍浅波状，叶下表皮细胞为不规则形，垂周壁波状或深波状；气孔器类型均以不等细胞型为主，少有无规则型，偶有平列型。依据叶表皮特征，可将中国大蒜芥属划分为三种类型： （1）叶上表皮无气孔分布或偶见； （2）叶上表皮气孔常明显几个聚成一簇或排成短列，气孔密度小于叶下表皮； （3）叶上表皮气孔比较均匀分布，气孔密度与叶下表皮近相似。

Studies on the Leaf Epidermal Micromorphology of Sisymbrium ( Brassicaceae ) from China

Leaf epidermis of 9 species and 1 variety of Sisymbium was investigated using light microscopy(LM). The main conclusions are as follows: The cells of the upper epidermis are usually polygonal, and the patterns of anticlinal walls are straight or arched, few slightly sinuolate. The cells of the lower epidermis are usually irregular and the patterns of anticlinal walls are sinuous or sinuate. The type of stomatal apparatuses is mainly anisocytic, rarely anomocytic and only occasionally paracytic. According to the leaf epidermal characters, the genus Sisymbrium from China can be divided into three types: (1) The upper epidermis has no or very few stomatal apparatuses. (2)The stomatal apparatuses of upper epidermis are usually gathered with 3 or 5 or arranged in short rows，and the stomatal density is less than that of the lower epidermis. (3) The stomatal apparatuses of upper epidermis are regularly dispersed, and the stomatal density is similar to that of lower epidermis.Leaf epidermis of 9 species and 1 variety of Sisymbium was investigated using light microscopy(LM). The main conclusions are as follows: The cells of the upper epidermis are usually polygonal, and the patterns of anticlinal walls are straight or arched, few slightly sinuolate. The cells of the lower epidermis are usually irregular and the patterns of anticlinal walls are sinuous or sinuate. The type of stomatal apparatuses is mainly anisocytic, rarely anomocytic and only occasionally paracytic. According to the leaf epidermal characters, the genus Sisymbrium from China can be divided into three types: (1) The upper epidermis has no or very few stomatal apparatuses. (2)The stomatal apparatuses of upper epidermis are usually gathered with 3 or 5 or arranged in short rows，and the stomatal density is less than that of the lower epidermis. (3) The stomatal apparatuses of upper epidermis are regularly dispersed, and the stomatal density is similar to that of lower epidermis.