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林业科学 ›› 2012, Vol. 48 ›› Issue (7): 182-185.doi: 10.11707/j.1001-7488.20120728

• 研究简报 • 上一篇    下一篇

几种梓属植物花粉形态及分类学意义

贾继文1,2, 麻文俊1, 王军辉1, 张金凤2, 张守攻1, 张建国1, 赵鲲3   

  1. 1. 中国林业科学研究院林业研究所林木遗传育种国家重点实验室 北京 100091;2. 北京林业大学林木育种国家工程实验室 林木花卉遗传育种教育部重点实验室 北京 100083;3. 洛阳市农林科学院 洛阳 471002
  • 收稿日期:2009-02-27 修回日期:2012-05-22 出版日期:2012-07-25 发布日期:2012-07-25
  • 通讯作者: 王军辉

Pollen Morphology of Several Species in Catalpa and Its Taxonomic Significance

Jia Jiwen1,2, Ma Wenjun1, Wang Junhui1, Zhang Jinfeng2, Zhang Shougong1, Zhang Jianguo1, Zhao Kun3   

  1. 1. State Key Laboratory of Tree Genetics and Breeding Research Institute of Forestry, Chinese Academy of Forestry Beijing 100091;2. National Engineering Laboratory for Tree Breeding Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants of Ministry of Education Beijing Forestry University Beijing 100083;3. Luoyang Academy of Agriculture and Forestry Sciences Luoyang 471002
  • Received:2009-02-27 Revised:2012-05-22 Online:2012-07-25 Published:2012-07-25

关键词: 梓属, 花粉形态, 四合花粉, 分类学意义

Abstract:

Using scanning electron microscopy (SEM), pollen morphology of 23 individual plants from 5 species of Catalpa was observed. All of them were aggregated into tetrad with tetrahedron or crisscross or squareness or rhombus or erose arrangement. The tetrads were spherical or subspherical, and the diameter was from 29.1 μm to 65.1 μm. The tetrad was inaperturate, and the surface was bestrewed with colpates which were communicated with each other with anomalous directions. There was a reticulate pattern with various sizes and shapes of lumina that were sunken while the muri were protuberant. These species were differentiated mainly in the size and exine sculpture of the pollen tetrads. Catalpa speciosa had the largest pollen with 55.8 μm in average, and Catalpa ovata had the smallest pollen with 42.4 μm. Between the two there were Catalpa fargesii f. duclouxii, Catalpa fargesii, and Catalpa bungei with their pollen of 52.9, 47.2, and 42.7 μm, respectively. C. bungei and C. fargesii f. duclouxii had similar exine sculpture, while C. fargesii, C. ovata and C. speciosa shared similar exine sculpture. The pollen morphology is overlapped with each other between two groups of Catalpa, and it cannot be used for taxonomy, but there is taxonomic significance at species level within group. Special pollens with protuberance in colpus without reticulate sculpture were observed in C. bungei and C. fargesii f. duclouxii, however, was not observed in other three species.

Key words: Catalpa, pollen morphology, tetrad, taxonomic significance

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