伞形科部分类群气孔结构及其分类学价值

摘要

该研究对变豆菜亚科及芹亚科基础类群20属29种（变豆菜亚科9属11种，芹亚科基础类群11属18种）植物叶片（苞片或果实）的气孔结构进行显微观察分析，以明确变豆菜亚科及芹亚科基础类群的气孔特征及其与伞形科其他类群的区别。结果显示：（1）变豆菜亚科及芹亚科基础类群的气孔类型有无规则型、不等型和平列型3种，其中变豆菜亚科的变豆菜族气孔为无规则型（占总气孔比例的35％～75％）及不等型（25％～65％），仅刺芹属（Eryngium）具平列型，而Steganotaenieae族的气孔均为无规则型；芹亚科基础类群除柴胡属（Bupleurum）外多为或仅为无规则型（75％～100％），少为不等型（5％～25％）。（2）气孔结构支持分子系统学将 A rctopus放入变豆菜亚科的变豆菜族，Choritaenia移入芹亚科。（3）变豆菜亚科气孔特征同芹亚科及牵环花亚科的较为相似，而同参棕亚科差别较大。%The stomatal structures of leaves (bracts or fruits) from 20 genera and 29 species (9 genera and 11 species of subfamily Saniculoideae ,11 genera and 18 species of basal subfamily Apioideae) .The results show that :(1) three types of stomata ,anomocytic ,anisocytic ,and paracytic .The stomata in tribe Sani‐culeae of Saniculoideae are anomocytic (35% -75% ) and anisocytic (25% -65% ) (in the total number of stomata) .The genus Eryngium has all three types ,and only anomocytic type in tribe Steganotaenieae .In the basal taxa of subfamily Apioideae (except Bup leurum) the stomata are more anomocytic (75% -100% ) and less anisocytic (5% -25% ) .(2)The stomatal features studied support to place A rctopus in Saniculeae and to move Choritaenia to Apioideae confirmed by molecular data .(3) The stomata structures of Saniculoideae are similar with those of Apioideae and Azorelloideae ,but differ from Mackinlayoideae .