高茎紫菀(菊科)形态描述补充及细胞学和分子系统学研究  

Supplementary Description,Cytological and Molecular Systematics of Aster procerus(Asteraceae)

作　　者：陶丽男 向丽 王玉琴 张代贵[3] 杨贤均 肖佳伟 TAO Li'nan;XIANG Li;WANG Yuqin;ZHANG Daigui;YANG Xianjun;XIAO Jiawei(College of Urban and Rural Construction, Shaoyang University, Shaoyang, Hunan 422004, China;2College of Life Sciences, Shanghai Normal University, Shanghai 200234, China;3College of Biology and Environmental Sciences, Jishou University, Jishou, Hunan 416000, China)

机构地区：[1]邵阳学院城乡建设学院,湖南邵阳422004 [2]上海师范大学生命科学学院,上海200234 [3]吉首大学生物资源与环境科学学院,湖南吉首416000

出　　处：《西北植物学报》2022年第1期66-74,共9页Acta Botanica Boreali-Occidentalia Sinica

基　　金：湖南省大学生创新创业训练项目[湘教通(2021)197号-3403];湖南省教育厅重点项目(20A451);中国科学院科技服务网络计划(KFJ-3W-NO1);2017年中医药公共卫生服务补助专项(财社[2017]66号);国家级大学生创新创业训练计划(202110547092)。

摘　　要：结合在模式产地采集的高茎紫菀(Aster procerus Hemsley)以及查阅文献资料,发现原始文献对其形态描述不充分且缺乏细胞学和分子系统学方面的报道。本研究对高茎紫菀的形态特征进行了补充描述以及核型特征和系统位置分析,为紫菀属的修订提供资料。结果表明:(1)依据观察结果,补充了高茎紫菀新的形态特征:基生叶羽状分裂,成熟的基生叶较大,长可达26 cm,宽可达8 cm;花序托圆锥状。(2)高茎紫菀的染色体数目为2n=18;核型公式为2n=2x=16 m+2 M,核型属于1 A。(3)基于ITS和ETS标记的分子系统发育树分析表明,高茎紫菀不同居群的2个个体在同一进化支上(LP=100,PP=1.00),且位于核心紫菀属(LP=100,PP=1.00),与女菀[Turczaninovia fastigiata(Fischer)Candolle]构成姐妹类群(LP=52,PP=0.99)。研究认为,高茎紫菀基生叶和花序托的特征可为紫菀属的分类提供新的证据,支持高茎紫菀位于紫菀属(Aster L.)内,建议将女菀并入紫菀属。The morphological description of Aster procerus Hemsley was not complete enough in the original literature when compared with the specimen which we collected from its type locality.Additionally,there is a lack of reports from cytology and molecular phylogeny in recent studies.We made a detailed description of A.procerus and did some studied about cytology and molecular phylogenetic on this species,and provided new evidences for the revision of Aster.The results reveal that:(1)there are some new characteristics for A.procerus that basal leaves pinnatilobed,larger when matured,up to 26 cm in length and 8 cm in width,and receptacle convex.(2)The cytology evidence showed that the number of chromosome was 2n=18 and the karyotype formulae was 2n=2x=16 m+2 M,belongs to 1A.(3)The molecular phylogenetic analysis which based on ITS and ETS showed that these two populations of A.procerus formed a highly supported clade(LP=100,PP=1.00)and was nested within the core Aster clade(LP=100,PP=1.00).Furthermore,phylogenetic analysis indicated that A.procerus was sister to Turczaninovia fastigiata(Fischer)Candolle.Our results supported A.procerus belongs to Aster and suggested transferring T.fastigiata to Aster.

关 键 词：菊科 形态学 核型分析 分子系统学 

分 类 号：Q948.15[生物学—植物学] Q949.783.5