中国独行菜族部分属种的叶表皮观察

Observation on the leaf epidermis of partial genera and species of Lepidieae from China

利用光学显微镜对中国十字花科独行菜族部分广布属及相关属植物进行了叶表皮微形态学观察研究,结果表明:所研究的中国独行菜族植物叶表皮微形态具有多样性,可以划分为两种类型:第一类,叶上下表皮同形或近同形,叶表面被单毛或光滑无毛,包括独行菜属、群心菜属、菘蓝属和菥蓂属;第二类,叶上下表皮不同形,叶表面被分支毛和单毛,包括荠属和亚麻荠属;叶表皮微形态结果支持荠属应从独行菜族中移出,独行菜族是一多系类群,同时认为荠属与亚麻荠属植物具有较近的亲缘关系。

Leaf epidermal features of partial genera and related genera of Lepidieae（Brassicaceae）from China were investigated by using light microscopy（LM）.The results show：the studied species of Lepidieae from China have diversity in the leaf features and they can be divided into two types：first,the morphology of the upper epidermis and the lower epidermis is similar,and with simple trichomes or glabrous on the leaf surface,including Lepidium,Cardaria,Isatis and Thlaspi;second,the morphology of lower epidermis is different from which of the upper epidermis,and with branched and simple trichomes on the leaf surface,including Capsella and Camelina.The results support that Capsella should moved out from Lepidieae,which is a polyphyletic group and Capsella is closely related to Camelina.