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植物研究 ›› 2016, Vol. 36 ›› Issue (1): 43-51.doi: 10.7525/j.issn.1673-5102.2016.01.006

• 论文 • 上一篇    下一篇

19个木莲属树种的花粉形态观察及其分类学意义

桑子阳1;张德春1,2;王玉兵2;马履一1*   

  1. 1.北京林业大学省部共建森林培育与保护教育部重点实验室,北京 100083;
    2.三峡大学生物技术研究中心,宜昌 443002
  • 出版日期:2016-01-15 发布日期:2016-05-18

Taxonomy Significance Based on Pollen Morphology Observation of 19 Species of Manglietia

SANG Zi-Yang1;ZHANG De-Chun1,2;WANG Yu-Bing2;MA Lü-Yi1*   

  1. 1.The Key Laboratory for Silviculture and Conservation of Ministry of Education,Beijing Forestry University,Beijing 100083;
    2.Biotechnology Research Center,China Three Gorges University,Yichang 443002
  • Online:2016-01-15 Published:2016-05-18

摘要: 通过对19个木莲属树种的花粉进行扫描电子显微镜观察拍照,观察描述花粉的形态学特征,测量花粉极轴与赤道轴长度、花粉表面孔穴和突起的密度并据此进行聚类分析。扫描电子显微镜下形态学观察结果表明:木莲属19个种的花粉均为舟形,且具有长及两端的远极萌发单沟等一致特征,花粉表面孔穴、突起等特征在种内部比较稳定,不同种之间差异明显,具有一定的分类学意义,但作为属下分类依据需慎重。聚类分析结果表明:相同地区或分布地域相近的树种花粉特征更相近,证明的遗传分枝与地理分布有很强的相关性。

关键词: 木莲属, 花粉形态, 分类

Abstract: We studied the pollen morphology of 19 species of Manglietia with scanning electron microscope(SEM), and measured the pollen size and densities of cavity and protuberance. The hierachical cluster analysis(HCA) was done based on the metrical data. Under SEM, all the pollens appear as boats, each pollen has a sprout channel whose length almost equal to the longer axis of pollen, the characters of pollen surfaces such as cavity and protuberance are steadily in same species, but there are some visible differences among pollen of different species. The result of HCA shows that the pollen morphology characteristics of the different species distributed in the same geographical region or similar areas have more similarities department, and there is a strong correlation between genetic branches and geographical distribution.

Key words: Manglietia, pollen morphology, taxonomy