植物分类学报

• 研究论文 • 上一篇    下一篇

濒危植物巴东木莲花粉母细胞减数分裂观察

何子灿, 李晓东, 李建强*   

  1. (中国科学院武汉植物园 武汉 430074)
  • 收稿日期:2004-10-19 修回日期:2005-07-05 出版日期:2005-11-18 发布日期:2005-11-18
  • 通讯作者: 李建强 E-mail:jianqiangl@hotmail.comlu

Meiotic observations on the pollen mother cells of Manglietia patungensis, an endangered species

HE Zi-Can, LI Xiao-Dong, LI Jian-Qiang*   

  1. (Wuhan Botanical Garden, the Chinese Academy of Sciences, Wuhan 430074, China)
  • Received:2004-10-19 Revised:2005-07-05 Online:2005-11-18 Published:2005-11-18
  • Contact: LI Jian-Qiang< E-mail:jianqiangl@hotmail.comlu

Abstract: A comparative study of meiosis of pollen mother cells in Manglietia patungensis Hu and its closely related species M. yuyuanensis Law was carried out. These two species had the same chromosome number of 2n=38 and the same karyotype, but their chromosomal behaviors in meiosis were different. In M. patungensis, the typical chromosome configurations observed at metaphase were 2n=0.30IV+18.33II+0.15I, whereas those in M. yuyuanensis were 2n=19II, indicating that some chromosomes in M. patungensis might have undergone inversion and that some chromosome components were possibly paracentric inversion heterozygotes. The abnormal rate of chromosomal behaviors at anaphase I and II was different in the two species. At anaphase II, 8.8% cells were observed with lagging chromosomes which in each cell did not exceed two in M. yuyuanensis, but in M. patungensis, 29.2% cells were observed with lagging chromosomes which could reach 11 in each cell. Additionally, broken chromosomes were observed in M. patungensis. The above results indicate that the abnormal rate of chromosomal behaviors in the meiosis of M. patungensis was higher than that in M. yuyuanensis. The abnormal behaviors of the chromosomes in meiosis observed in M. patungensis may have affected the development of pollen grains in this species.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 赵良成, 吴志毅. 川蔓藻属系统分类和演化评述[J]. 植物分类学报, 2008, 46(4): 467 -478 .
[2] 王玛丽, 徐皓, 郑玲. 直立介蕨是假蹄盖蕨属的成员[J]. 植物分类学报, 2006, 44(2): 204 -210 .
[3] 傅承新, 沈朝栋. 贵州菝葜属一新种[J]. 植物分类学报, 1997, 35(1): 70 -72 .
[4] 郑洪萍, 陈灼华. 中国转板藻属一新种[J]. 植物分类学报, 1998, 36(5): 463 -464 .
[5] 李复兴. 一种高产优质饲料作物——聚合草[J]. 植物分类学报, 1977, 15(1): 94 .
[6] 向巧萍, 傅立国. 冷杉属植物叶角质层内表面的观察及其系统学意义[J]. 植物分类学报, 1998, 36(5): 441 -448 .
[7] 黄双全, 郭友好, 陈家宽. 渐危植物鹅掌楸的授粉率及花粉管生长[J]. 植物分类学报, 1998, 36(4): 310 -316 .
[8] 郑向炜, 潘海韵, 王玉国, 陈家宽. 宽叶泽苔草萜类化学成分分析及其化学分类学意义[J]. 植物分类学报, 2007, 45(4): 570 -575 .
[9] 朱华, 王洪, 李保贵. 裸花属——中国一新记录属及其生物地理学意义[J]. 植物分类学报, 2000, 38(5): 462 -463 .
[10] 王印政. 异叶苣苔属地上茎的生长式样及其系统发育意义[J]. 植物分类学报, 2000, 38(3): 231 -235 .