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植物研究 ›› 2022, Vol. 42 ›› Issue (5): 741-745.doi: 10.7525/j.issn.1673-5102.2022.05.004

• 系统与进化 • 上一篇    下一篇

长柄马兰(菊科)的形态补充描述及细胞学研究

肖佳伟1, 王颖嘉1, 黄文轩2, 黎维平2(), 康公平3   

  1. 1.邵阳学院城乡建设学院,邵阳 422004
    2.湖南师范大学生命科学学院,长沙 410081
    3.贵州省梵净山地区生物多样性保护与利用重点实验室,铜仁学院,铜仁 554300
  • 收稿日期:2022-04-11 出版日期:2022-09-20 发布日期:2022-09-15
  • 通讯作者: 黎维平 E-mail:lwp2018@aliyun.com
  • 作者简介:肖佳伟(1992—),男,博士,助理研究员,主要从事紫菀族的分类研究。
  • 基金资助:
    国家自然科学基金(31370265);贵州省梵净山地区生物多样性保护与利用重点实验室开放课题基金资助(黔科合平台人才[2020]2003)

Supplementary Description on Morphology and Cytology of Aster longipetiolatus C.C.Chang (Asteraceae)

Jiawei XIAO1, Yingjia WANG1, Wenxuan HUANG2, Weiping LI2(), Gongping KANG3   

  1. 1.College of Urban and Rural Construction,Shaoyang University,Shaoyang 422004
    2.College of Life Sciences,Hunan Normal Changsha,Hunan 410081
    3.Guizhou Provincial Key Laboratory for Biodiversity Conservation and Utilization in the Fanjing Mountain Region(Tongren University),Tongren 554300
  • Received:2022-04-11 Online:2022-09-20 Published:2022-09-15
  • Contact: Weiping LI E-mail:lwp2018@aliyun.com
  • About author:XIAO Jiawei(1992—),male,doctor,assistant researcher,majoring in the taxonomy of the Trib. Astereae.
  • Supported by:
    National Natural Science Foundation of China(31370265);Supported by the Open Research Fund of Guizhou Provincial Key Laboratory for Biodiversity Conservation and Utilization in the Fanjing Mountain Region([2020]2003)

摘要:

结合模式产地采集的长柄马兰(Aster longipetiolatus C.C.Chang)标本以及查阅相关文献资料,发现已有的形态描述不充分且缺乏细胞学方面的报道。本研究对长柄马兰的形态特征进行补充描述和核型分析,为探讨其分类地位提供资料。结果包括:①发现并补充长柄马兰新的形态特征:花序托凸起、总苞片3~4层、舌状花具有退化雄蕊、舌片具柔毛、瘦果5肋。②细胞学结果表明,长柄马兰的染色体数目为2n=18,核型公式为2n= 18=16m+2sm,核型属于1A。

关键词: 菊科, 形态学, 退化雄蕊, 核型分析

Abstract:

The morphological description of Aster longipetiolatus C.C.Chang was inadequate in the original literature when compared with the specimen which we collected from its type locality, and there was a lack of cytological reports. The detailed morphological and cytological description of A. longipetiolatus were carried out, and the new evidences of plant taxonomical revision would be provided. The results showed that: ①There were some newly-discovered characteristics for A. longipetiolatus. For example, the receptacle was convex, phyllaries 3- or 4-seriate, ray floret staminodes, lamina pilosulose and achenes 5-ribbed; ②Its cytology evidence revealed that the chromosome number was 2n=18 and the karyotype formulae was 2n=2x=16m+2sm, belonged to the type 1A.

Key words: Asteraceae, morphology, staminode, karyotype analysis

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