Karyomorphology of three species in Dipentodon(Dipentodontaceae),Perrottetia(Celastraceae),and Tapiscia(Tapisciaceae) of the order Huerteales and their phylogenetic implications

作     者：Jing YANG Jiang-Chong WU Zhi-Jian GU~* (Kunming Botanical Garden,Kunming Institute of Botany,Chinese Academy of Sciences,Kunming 650204,China) 

作者机构：(Kunming Botanical Garden Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China) 

出 版 物：《Journal of Systematics and Evolution》 (植物分类学报(英文版))

年 卷 期：2009年第47卷第4期

页      面：291-296页

核心收录：

学科分类：0710[理学-生物学] 071001[理学-植物学] 07[理学] 

基　　金：provided by the Knowledge Innovation Project of Kunming Institute of Botany(grant no.54O7064713K1) 

主　　题：chromosome number Dipentodon karyomorphology Perrottetia phylogenetic relationship Tapiscia. 

摘      要：The karyomorphology of three species in Dipentodon(Dipentodontaceae),Perrottetia(Celastraceae),and Tapiscia(Tapisciaceae),namely Dipentodon sinicus,Perrottetia racemosa,and Tapiscia sinensis,was investigated in the present *** molecular research has discovered close relationships among these three genera, which has led to the establishment of the order Huerteales with Perrottetia being placed in Dipentodontaceae. Herein we report the chromosome numbers of *** and P racemosa for the first time,and present their karyotype formulas as 2n = 34 = 22 sm+12 st(***),2n = 20 = 11 m+9 sm(***),and 2n = 30 = 22 m(2SAT)+8sm(***).Asymmetry of their karyotypes is categorized to be Type 3B in ***,Type 2A in ***,and Type 2A in *** of the species shows special cytological features. Compared with Perrottetia,Dipentodon has a different basic chromosome number,a higher karyotype asymmetry, and different karyomorphology of its interphase nuclei,mitotic prophase,and ***,on the basis of these results,we have reservations regarding the suggestion of placing Dipentodon and Perrottetia together in the family Dipentodontaceae.