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|本期目录/Table of Contents|

 广西含笑的小孢子发生及雄配子体形成的研究()

《广西植物》[ISSN:1000-3142/CN:45-1134/Q]

期数:
2011年03期
页码:
312-317
栏目:
系统与演化植物学
出版日期:
2011-08-01

文章信息/Info

Title:
 Studies of microsporogenesis and male gametophyte formation of Michelia guangxiensis
作者:
 付琳1 徐凤霞1 曾庆文1* 朱开甫2
 1.中国科学院 华南植物园, 广州 510650; 2.徐闻县神州木兰园培植中心, 广东 湛江 524100
Author(s):
 FU Lin1 XU Feng-Xia1 ZENG Qing-Wen1* ZHU Kai-Fu2
 1.South China Botanical Garden, the Chinese Academy of Sciences, Guangzhou 510650, China; 2.Shenzhou Magnolia Garden and Breeding Center of Xuwen, Zhanjiang 524100, China
关键词:
 广西含笑 木兰科 小孢子发生 雄配子体形成
Keywords:
 MagnoliaceaeMichelia guangxiensis microsporogenesis male gametophyte formation
分类号:
-
DOI:
-
文献标识码:
A
摘要:
 对广西含笑的小孢子发生和雄配子体形成过程进行了解剖学研究。广西含笑的花药具4个花粉囊,花药壁由表皮、药室内壁、中层(3~5层)和绒毡层(1~2层)组成。绒毡层为腺质绒毡层,细胞具2至多核,到花粉成熟时自溶消失。小孢子母细胞减数分裂的胞质分裂为修饰性同时型,四分体排列方式为交叉型、对称型、“T”型(极少),成熟花粉粒具单沟,散粉时为二细胞型。在200个样品中,约有30%花药的小孢子母细胞在减数分裂前败育,还有40%的花药具有大量萎缩变形的花粉粒,花粉萌发率最高值只有25%。
Abstract:
 Microsporogenesis and male gametophyte formation of Michelia guangxiensis  were first observed in this paper. Anthers are tetrasporangiate and anther wall is composed of epidermis,fibrous endothecium,middle layer(3-5 layers)and tapetum(1-2 layers). The tapetum is of glandular type with 2 or more nucleus,which degenerate and finally disappear when the pollens are mature. Cytokinesis in meiosis is modified simultaneous type,resulting in decussate,isobilateral or Tshaped(rarely)tetrads. Pollen is monocolpate and sheds at the 2cell stage. Among the 200 samples,the microspore mother cells in 30% anthers degenerate before meiosis and the microspores in 40% anthers degenerate seriously. The highest pollen germination rate is 25% only.

参考文献/References

备注/Memo

备注/Memo:
更新日期/Last Update: 2011-07-01