园艺学报 ›› 2020, Vol. 47 ›› Issue (5): 893-906.doi: 10.16420/j.issn.0513-353x.2019-0426

• 研究论文 • 上一篇    下一篇

凤仙花组(Impatiens sect. Impatiens)植物花粉形态研究

王 茜1,2,3,杨旭东2,4,5,夏常英1,3,4,李 瑾4,5,于胜祥4,5,*   

  1. 1西南大学生命科学学院三峡库区生态环境教育部重点实验室,重庆 400715;2西南大学生命科学学院,重庆 400715;3西南大学生命科学学院植物资源保护与种质创新重庆市重点实验室,重庆 400715;4中国科学院植物研究所系统与进化植物学国家重点实验室,北京 100093;5中国科学院大学,北京 100049
  • 出版日期:2020-05-25 发布日期:2020-05-25
  • 基金资助:

Pollen Morphology of Impatiens sect. Impatiens(Balsaminaceae)

WANG Qian1,2,3,YANG Xudong2,4,5,XIA Changying1,3,4,LI Jin4,5,and YU Shengxiang4,5,*   

  1. 1Key Laboratory of Eco-Environments in Three Gorges Reservoir Region,Ministry of Education,School of Life Sciences,Southwest University,Chongqing 400715,China;2School of Life Sciences,Southwest University,Chongqing 400715,China;3Chongqing Key Laboratory of Plant Resource Conservation and Germplasm Innovation,School of Life Sciences,Southwest University,Chongqing 400715,China;4State Key Laboratory of Systematic and Evolutionary Botany,Institute of Botany,Chinese Academy of Sciences,Beijing 100093,China;5University of Chinese Academy of Sciences,Beijing 100049,China
  • Online:2020-05-25 Published:2020-05-25

摘要: 运用扫描电镜对国产凤仙花组30种植物的花粉形态进行观察研究。结果表明:该组植物的花粉普遍表现为单粒4沟花粉,极面观多为矩圆形,具角萌发沟,表面具网状纹饰;此外,不同种花粉在大小、极面观形状、网脊形态、网眼大小、网眼内颗粒状附属物密度等性状上有明显差异,如极面观多为矩圆形,偶见近圆形、近方形等,花粉表面网状纹饰的网眼有疏密均匀和疏密不均匀两种类型,网脊边缘形状有平滑和波状,网眼内颗粒状附属物不同的密度等。综合以上性状将本组植物的花粉划分为2个类型,8个亚类型。本研究的结果表明花粉形态特征,特别是花粉表面纹饰的网眼是否均匀、网脊形态、网眼大小、网眼内颗粒状附属物的密度等特征可作为凤仙花组组下划分的依据,对其种水平的界定也有一定的帮助。

关键词: 凤仙花属, 凤仙花组, 花粉形态, 扫描电镜, 分类学

Abstract: To study the taxonomic value and systematic implications of the pollen morphology of sect. Impatiens,30 species from this section were studied by Scanning Electron Microscope. The results indicated that the morphological characteristics of the pollen grains are generally shown as follows:single and 4-colpate pollen grains are mostly oblong,germinal furrow are horned,the exine of pollen grains are of reticulate ornamentation. In addition,pollens of different species have significant differences in size, polar shape,muri shape,lumen size and the density of granular appendages in the lumen. For example,polar shape is mostly oblong,occasionally,there are also sub-rounded and sub-quadrate. Lumina on the surface of pollen distributed in two types:even and uneven. The muri of lumen are smooth or sinuate towards margin. There are granular appendages in the lumina with different densities. Based on above characteristics,the pollen of sect. Impatiens was divided into two types and eight subtypes. This study indicated that the morphological characteristics of pollen,especially if the lumen is even,muri shape,lumen size,and granules density in the lumen,could be used as the basis for classification of sect. Impatiens and the definition of species level.

Key words: Impatiens, sect. Impatiens, pollen morphology, SEM, taxonomy